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Enhanced Deuteron Coalescence Probability in Jets

physical Review Letters 2023年第4期131卷 042301-042301页

作者： S. Acharya D. Adamová A. Adler G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt I. Altsybeev M. N. Anaam C. Andrei A. Andronic V. Anguelov F. Antinori P. Antonioli N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli M. Aresti R. Arnaldi J. G. M. C. A. Arneiro I. C. Arsene M. Arslandok A. Augustinus R. Averbeck M. D. Azmi A. Badalà J. Bae Y. W. Baek X. Bai R. Bailhache Y. Bailung A. Balbino A. Baldisseri B. Balis D. Banerjee Z. Banoo R. Barbera F. Barile L. Barioglio M. Barlou G. G. Barnaföldi L. S. Barnby V. Barret L. Barreto C. Bartels K. Barth E. Bartsch N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden C. Beattie P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov A. Berdnikova L. Bergmann M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin M. A. Bhat B. Bhattacharjee L. Bianchi N. Bianchi J. Bielčík J. Bielčíková J. Biernat A. P. Bigot A. Bilandzic G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume G. Boca F. Bock T. Bodova A. Bogdanov S. Boi J. Bok L. Boldizsár A. Bolozdynya M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov A. G. Borquez Carcamo H. Bossi E. Botta Y. E. M. Bouziani L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno M. D. Buckland D. Budnikov H. Buesching S. Bufalino O. Bugnon P. Buhler Z. Buthelezi S. A. Bysiak M. Cai H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo M. Carabas A. A. Carballo F. Carnesecchi R. Caron L. A. D. Carvalho J. Castillo Castellanos F. Catalano C. Ceballos Sanchez I. Chakaberia P. Chakraborty S. Chandra S. Chapeland M. Chartier S. Chattopadhyay T. G. Chavez T. Cheng C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato E. S. Chizzali J. Cho S. Cho P. Chochula P. Chri Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Nuclear Physics Institute of the Czech Academy of Sciences Husinec-Řež Czech Republic Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik Fachbereich Informatik und Mathematik Frankfurt Germany European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy INFN Sezione di Bologna Bologna Italy Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafárik University Košice Slovak Republic Affiliated with an institute covered by a cooperation agreement with CERN Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Bologna Italy University of Houston Houston Texas United States Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania Westfälische Wilhelms-Universität Münster Institut für Kernphysik Munster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy Lawrence Berkeley National Laboratory Berkeley California United States SUBATECH IMT Atlantique Nantes Université CNRS-IN2P3 Nantes France Laboratoire de Physique Subatomique et de Cosmologie Université Grenoble-Alpes CNRS-IN2P3 Grenoble France Universidade de São Pa

The transverse-momentum (pT) spectra and coalescence parameters B2 of (anti)deuterons are measured in p-p collisions at s=13 TeV for the first time in and out of jets. In this measurement, the direction of the leading particle with the highest pT in the event (pTlead>5 GeV/c) is used as an approximation for the jet axis. The event is consequently divided into three azimuthal regions, and the jet signal is obtained as the difference between the toward region, that contains jet fragmentation products in addition to the underlying event (UE), and the transverse region, which is dominated by the UE. The coalescence parameter in the jet is found to be approximately a factor of 10 larger than that in the underlying event. This experimental observation is consistent with the coalescence picture and can be attributed to the smaller average phase-space distance between nucleons in the jet cone as compared with the underlying event. The results presented in this Letter are compared to predictions from a simple nucleon coalescence model, where the phase-space distributions of nucleons are generated using pythia8 with the Monash 2013 tuning, and to predictions from a deuteron production model based on ordinary nuclear reactions with parametrized energy-dependent cross sections tuned on data. The latter model is implemented in pythia8.3. Both models reproduce the observed large difference between in-jet and out-of-jet coalescence parameters, although the almost flat trend of the B2Jet is not reproduced by the models, which instead give a decreasing trend.

关键词： Hadron-hadron interactions

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Measurement of the Lifetime and Λ Separation Energy of HΛ3

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physical Review Letters 2023年第10期131卷 102302-102302页

作者： S. Acharya D. Adamová A. Adler G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali Y. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt I. Altsybeev M. N. Anaam C. Andrei A. Andronic V. Anguelov F. Antinori P. Antonioli C. Anuj N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli M. Aresti R. Arnaldi I. C. Arsene M. Arslandok A. Augustinus R. Averbeck M. D. Azmi A. Badalà Y. W. Baek X. Bai R. Bailhache Y. Bailung R. Bala A. Balbino A. Baldisseri B. Balis D. Banerjee Z. Banoo R. Barbera F. Barile L. Barioglio M. Barlou G. G. Barnaföldi L. S. Barnby V. Barret L. Barreto C. Bartels K. Barth E. Bartsch F. Baruffaldi N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden C. Beattie P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov A. Berdnikova L. Bergmann M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin M. A. Bhat B. Bhattacharjee L. Bianchi N. Bianchi J. Bielčík J. Bielčíková J. Biernat A. P. Bigot A. Bilandzic G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume G. Boca F. Bock T. Bodova A. Bogdanov S. Boi J. Bok L. Boldizsár A. Bolozdynya M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov A. G. Borquez Carcamo H. Bossi E. Botta Y. E. M. Bouziani L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno M. D. Buckland D. Budnikov H. Buesching S. Bufalino O. Bugnon P. Buhler Z. Buthelezi J. B. Butt S. A. Bysiak M. Cai H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo M. Carabas A. A. Carballo F. Carnesecchi R. Caron J. Castillo Castellanos F. Catalano C. Ceballos Sanchez I. Chakaberia P. Chakraborty S. Chandra S. Chapeland M. Chartier S. Chattopadhyay T. G. Chavez T. Cheng C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato E. S. Chizzali J. Cho S. Cho P. Chochula P. Chri Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Nuclear Physics Institute of the Czech Academy of Sciences Husinec-Řež Czech Republic Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik Fachbereich Informatik und Mathematik Frankfurt Germany European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy INFN Sezione di Bologna Bologna Italy Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafárik University Košice Slovak Republic Affiliated with an institute covered by a cooperation agreement with CERN Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico COMSATS University Islamabad Islamabad Pakistan Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Bologna Italy University of Houston Houston Texas United States Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania Westfälische Wilhelms-Universität Münster Institut für Kernphysik Munster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy Lawrence Berkeley National Laboratory California United States SUBATECH IMT Atlantique Nantes Université CNRS-IN2P3 Nantes France Laboratoire de Physique Subatomique et de Cosmologie Université Grenoble-Alpes CNRS-IN2P3

The most precise measurements to date of the HΛ3 lifetime τ and Λ separation energy BΛ are obtained using the data sample of Pb-Pb collisions at sNN=5.02 TeV collected by ALICE at the LHC. The HΛ3 is reconstructed via its charged two-body mesonic decay channel (HΛ3→He3+π− and the charge-conjugate process). The measured values τ=[253±11(stat)±6(syst)] ps and BΛ=[102±63(stat)±67(syst)] keV are compatible with predictions from effective field theories and confirm that the HΛ3 structure is consistent with a weakly bound system.

关键词： Meson & hyperon induced nuclear reactions Relativistic heavy-ion collisions Hyperons

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Studying the interaction between charm and light-flavor mesons

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physical Review D 2024年第3期110卷 032004-032004页

作者： S. Acharya D. Adamová G. Aglieri Rinella L. Aglietta M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov V. Akishina M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt A. R. Altamura I. Altsybeev J. R. Alvarado M. N. Anaam C. Andrei N. Andreou A. Andronic E. Andronov V. Anguelov F. Antinori P. Antonioli N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli M. Aresti R. Arnaldi J. G. M. C. A. Arneiro I. C. Arsene M. Arslandok A. Augustinus R. Averbeck M. D. Azmi H. Baba A. Badalà J. Bae Y. W. Baek X. Bai R. Bailhache Y. Bailung R. Bala A. Balbino A. Baldisseri B. Balis D. Banerjee Z. Banoo F. Barile L. Barioglio M. Barlou B. Barman G. G. Barnaföldi L. S. Barnby E. Barreau V. Barret L. Barreto C. Bartels K. Barth E. Bartsch N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden C. Beattie P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova L. G. E. Beltran Y. A. V. Beltran G. Bencedi A. Bensaoula S. Beole Y. Berdnikov A. Berdnikova L. Bergmann M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin M. A. Bhat B. Bhattacharjee L. Bianchi N. Bianchi J. Bielčík J. Bielčíková A. P. Bigot A. Bilandzic G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume G. Boca F. Bock T. Bodova J. Bok L. Boldizsár M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov A. G. Borquez Carcamo H. Bossi E. Botta Y. E. M. Bouziani L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno M. D. Buckland D. Budnikov H. Buesching S. Bufalino P. Buhler N. Burmasov Z. Buthelezi A. Bylinkin S. A. Bysiak J. C. Cabanillas Noris M. F. T. Cabrera M. Cai H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo S. L. Cantway M. Carabas A. A. Carballo F. Carnesecchi R. Caron L. A. D. Carvalho J. Castillo Castellanos M. Castoldi F. Catalano S. Cattaruzzi C. Ceballos Sanchez R. Cerri I. Chakaberia P. Chakraborty S. Ch Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Nuclear Physics Institute of the Czech Academy of Sciences Husinec-Řež Czech Republic Geneva Switzerland Dipartimento di Fisica dell’Università and Sezione INFN Turin Italy Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Bologna Italy Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafárik University Košice Slovak Republic Affiliated with an institute covered by a cooperation agreement with CERN Frankfurt Institute for Advanced Studies Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico University of Houston Houston Texas USA Sungkyunkwan University Suwon City Republic of Korea Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany INFN Sezione di Bari Bari Italy Physik Department Technische Universität München Munich Germany High Energy Physics Group Universidad Autónoma de Puebla Puebla Mexico Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania University of Derby Derby United Kingdom Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy INFN Sezione di Bologna Bologna Italy Lawrence Berkeley National Laboratory

The two-particle momentum correlation functions between charm mesons (D*± and D±) and charged light-flavor mesons (π± and K±) in all charge combinations are measured for the first time by the ALICE Collaboration in high-multiplicity proton–proton collisions at a center-of-mass energy of s=13 TeV. For DK and D*K pairs, the experimental results are in agreement with theoretical predictions of the residual strong interaction based on quantum chromodynamics calculations on the lattice and chiral effective field theory. In the case of Dπ and D*π pairs, tension between the calculations including strong interactions and the measurement is observed. For all particle pairs, the data can be adequately described by Coulomb interaction only, indicating a shallow interaction between charm and light-flavor mesons. Finally, the scattering lengths governing the residual strong interaction of the Dπ and D*π systems are determined by fitting the experimental correlation functions with a model that employs a Gaussian potential. The extracted values are small and compatible with zero.

关键词： Hadron-hadron interactions Strong interaction Charmed mesons

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System-size dependence of the hadronic rescattering effect at energies available at the CERN Large Hadron Collider

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physical Review C 2024年第1期109卷 014911-014911页

作者： S. Acharya D. Adamová G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt A. R. Altamura I. Altsybeev J. R. Alvarado M. N. Anaam C. Andrei N. Andreou A. Andronic V. Anguelov F. Antinori P. Antonioli N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli M. Aresti R. Arnaldi J. G. M. C. A. Arneiro I. C. Arsene M. Arslandok A. Augustinus R. Averbeck M. D. Azmi H. Baba A. Badalà J. Bae Y. W. Baek X. Bai R. Bailhache Y. Bailung A. Balbino A. Baldisseri B. Balis D. Banerjee Z. Banoo R. Barbera F. Barile L. Barioglio M. Barlou B. Barman G. G. Barnaföldi L. S. Barnby V. Barret L. Barreto C. Bartels K. Barth E. Bartsch N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden C. Beattie P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova Y. A. V. Beltran G. Bencedi S. Beole Y. Berdnikov A. Berdnikova L. Bergmann M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin M. A. Bhat B. Bhattacharjee L. Bianchi N. Bianchi J. Bielčík J. Bielčíková J. Biernat A. P. Bigot A. Bilandzic G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume G. Boca F. Bock T. Bodova A. Bogdanov S. Boi J. Bok L. Boldizsár M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov A. G. Borquez Carcamo H. Bossi E. Botta Y. E. M. Bouziani L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno M. D. Buckland D. Budnikov H. Buesching S. Bufalino P. Buhler N. Burmasov Z. Buthelezi A. Bylinkin S. A. Bysiak M. Cai H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo S. L. Cantway M. Carabas A. A. Carballo F. Carnesecchi R. Caron L. A. D. Carvalho J. Castillo Castellanos F. Catalano C. Ceballos Sanchez I. Chakaberia P. Chakraborty S. Chandra S. Chapeland M. Chartier S. Chattopadhyay T. Cheng C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato E. Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Nuclear Physics Institute of the Czech Academy of Sciences Husinec-Řež Czech Republic European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy INFN Sezione di Bologna Bologna Italy Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafárik University Košice Slovak Republic Affiliated with an institute covered by a cooperation agreement with CERN Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy University of Houston Houston Texas USA Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany INFN Sezione di Bari Bari Italy Physik Department Technische Universität München Munich Germany High Energy Physics Group Universidad Autónoma de Puebla Puebla Mexico Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania University of Derby Derby United Kingdom Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy Lawrence Berkeley National Laboratory Berkeley California USA SUBATECH IMT Atlantique Nantes Université CNRS-IN2P3 Nantes France Laboratoire de Physique Subatomique et de Cosmologie Université Grenoble-Alpes CN

The first measurements of K*(892)0 resonance production as a function of charged-particle multiplicity in Xe-Xe collisions at sNN=5.44 TeV and pp collisions ats=5.02 TeV using the ALICE detector are presented. The resonance is reconstructed at midrapidity (|y| < 0.5) using the hadronic decay channel K*0 →K±π∓. Measurements of transverse-momentum integrated yield, mean transverse-momentum, nuclear modification factor of K*0, and yield ratios of resonance to stable hadron (K*0/K) are compared across different collision systems (pp, p-Pb, Xe-Xe, and Pb-Pb) at similar collision energies to investigate how the production of K*0 resonances depends on the size of the system formed in these collisions. The hadronic rescattering effect is found to be independent of the size of colliding systems and mainly driven by the produced charged-particle multiplicity, which is a proxy of the volume of produced matter at the chemical freeze-out. In addition, the production yields of K*0 in Xe-Xe collisions are utilized to constrain the dependence of the kinetic freeze-out temperature on the system size using the hadron resonance gas–partial chemical equilibrium model.

关键词： Hadron-hadron interactions Particle & resonance production Relativistic heavy-ion collisions

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Beyond the Standard Model with SWGO 38

Beyond the Standard Model with SWGO

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38th International Cosmic Ray Conference, ICRC 2023

作者： Patrick Harding, J. Abreu, P. Albert, A. Alfaro, R. Alfonso, A. Álvarez, C. An, Q. Angüner, E.O. Arcaro, C. Arceo, R. Arias, S. Arnaldi, H. Assis, P. Ayala Solares, H.A. Bakalova, A. de Almeida, U. Barres Batkovic, I. Bazo, J. Bellido, J. Belmont, E. BenZvi, S.Y. Bernal, A. Bian, W. Bigongiari, C. Bottacini, E. Brogueira, P. Bulik, T. Busetto, G. Caballero-Mora, K.S. Camarri, P. Campos, S. Cao, W. Cao, Z. Cao, Z. Capistrán, T. Cardillo, M. Carquin, E. Carramiñana, A. Castromonte, C. Chang, J. Chaparro, O. Chen, S. Chianese, M. Chiavassa, A. Chytka, L. Colallillo, R. Conceição, R. Consolati, G. Cordero, R. Costa, P.J. Cotzomi, J. Dasso, S. De Angelis, A. Desiati, P. Di Pierro, F. Di Sciascio, G. Díaz Vélez, J.C. Dib, C. Dingus, B. Djuvsland, J. Dobrigkeit, C. Domingues Mendes, L.M. Dorigo, T. Doro, M. dos Reis, A.C. Du Vernois, M. Echiburú, M. Elsaesser, D. Engel, K. Ergin, T. Espinoza, F. Fang, K. Farfán Carreras, F. Fazzi, A. Feng, C. Feroci, M. Fraija, N. Fraija, S. Franceschini, A. Franco, G.F. Funk, S. Garcia, S. García-González, J.A. Garfias, F. Giacinti, G. Gibilisco, L. Glombitza, J. Goksu, H. Gong, G. González, B.S. Gonzalez, M.M. Goodman, J. Gu, M. Guarino, F. Gupta, S. Haist, F. Hakobyan, H. Han, G. Hansen, P. Harding, J.P. Helo, J. Herzog, I. Hidalgo, H.D. Hinton, J. Hu, K. Huang, D. Huentemeyer, P. Hueyotl-Zahuantitla, F. Iriarte, A. Isakovic, J. Isolia, A. Joshi, V. Juryšek, J. Kaci, S. Kieda, D. La Monaca, F. La Mura, G. Lang, R.G. Laspiur, R. Lavitola, L. Lee, J. Leitl, F. Lessio, L. Li, C. Li, J. Li, K. Li, T. Liberti, B. Lin, S. Liu, D. Liu, J. Liu, R. Longo, F. Luo, Y. Lv, J. Macerata, E. Malone, K. Mandat, D. Manganaro, M. Mariani, M. Mariazzi, A. Mariotti, M. Marrodan, T. Martinez, J. Martínez-Huerta, H. Medina, S. Melo, D. Mendes, L.F. Meza, E. Miceli, D. Miozzi, S. Mitchell, A. Molinario, A. Morales-Olivares, O.G. Moreno, E. Morselli, A. Laboratório de Instrumentação de Física Experimental de Partículas - LIP Av. Prof. Gama Pinto 2 Lisboa1649-003 Portugal Departamento de Física Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais 1 Lisboa1049-001 Portugal Physics Division Los Alamos National Laboratory Los AlamosNM United States Instituto de Física Universidad Nacional Autónoma de México Circuito de la Investigación Científica C.U. A. Postal 70-364 Cd. de México04510 Mexico Universidad de La Serena Chile Facultad de Ciencias en Física y Matemáticas Universidad Autónoma de Chiapas Chiapas Tuxtla Gutiérrez29050 Mexico School of Physical Science University of Science and Technology of China 96 Jinzhai Road Anhui Hefei230026 China TÜBITAK Research Institute for Fundamental Sciences Gebze41470 Turkey INFN Sezione di Padova PadovaI-35131 Italy Universidad Nacional de San Antonio Abad del Cusco Av. de la Cultura Nro. 733 Cusco Peru Av. E. Bustillo 9500 San Carlos de Bariloche Rio Negro8400 Argentina Department of Physics Pennsylvania State University University ParkPA United States Institute of Physics The Czech Academy of Sciences Prague Czech Republic Rua Dr. Xavier Sigaud 150 Rio de Janeiro22290-180 Brazil Universidade de São Paulo Instituto de Astronomia Geofísica e Ciências Atmosféricas Departamento de Astronomia Rua do Matão 1226 São Paulo05508-090 Brazil Università di Padova PadovaI-35131 Italy Pontificia Universidad Católica del Perú Av. Universitaria 1801 San Miguel Lima15088 Peru Universidad Nacional de San Agustin de Arequipa Santa Catalina Nro. 117. Arequipa Peru University of Adelaide AdelaideSA Australia Department of Physics and Astronomy University of Rochester RochesterNY United States Instituto de Astronomía Universidad Nacional Autónoma de México Circuito Exterior C.U. A. Postal 70-264 Cd. de México04510 Mexico Tsung-Dao Lee Institute School of Physics and Astronomy Shanghai Jiao Tong University 520 Shengrong Road Shanghai

Observations of very high-energy (>1 TeV) cosmic gamma rays are a powerful, unique tool to explore new physics beyond the Standard Model. The Southern Wide-field Gamma-Ray Observatory (SWGO), a next-generation experiment looking for cosmic gamma rays, will be situated in the Southern hemisphere with gamma-ray sensitivity up to hundreds of TeV. This observatory will have an order of magnitude better sensitivity than the current-generation High Altitude Water Cherenkov (HAWC) observatory. Because of its increased sensitivity and location in the Southern hemisphere, SWGO will be ideally situated to look for dark matter signals from the Milky Way. Specifically, SWGO will be able to search for dark matter signals a thousand times dimmer than those observable with HAWC. SWGO will also be well-situated to search for other phenomena Beyond-the-Standard-Model, including Primordial Black Holes, Axion-like Particles, and Violations of Lorentz Invariance. In this presentation, I will discuss the prospects for SWGO as a leading observatory in next-generation searches for physics beyond the Standard Model. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Dark Matter

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Manufacture Details of a SWGO Double-Layer Tank Design - Water Cherenkov Detector Prototype 38

Manufacture Details of a SWGO Double-Layer Tank Design - Wat...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Bellido, José Schneider, Michael Abreu, P. Albert, A. Alfaro, R. Alfonso, A. Álvarez, C. An, Q. Angüner, E.O. Arcaro, C. Arceo, R. Arias, S. Arnaldi, H. Assis, P. Ayala Solares, H.A. Bakalova, A. Barres de Almeida, U. Batković, I. Bazo, J. Bellido, J. Belmont, E. BenZvi, S.Y. Bernal, A. Bian, W. Bigongiari, C. Bottacini, E. Brogueira, P. Bulik, T. Busetto, G. Caballero-Mora, K.S. Camarri, P. Campos, S. Cao, W. Cao, Z. Cao, Z. Capistrán, T. Cardillo, M. Carquin, E. Carramiñana, A. Castromonte, C. Chang, J. Chaparro, O. Chen, S. Chianese, M. Chiavassa, A. Chytka, L. Colallillo, R. Conceição, R. Consolati, G. Cordero, R. Costa, P.J. Cotzomi, J. Dasso, S. De Angelis, A. Desiati, P. Di Pierro, F. Di Sciascio, G. Díaz Vélez, J.C. Dib, C. Dingus, B. Djuvsland, J. Dobrigkeit, C. Domingues Mendes, L.M. Dorigo, T. Doro, M. dos Reis, A.C. Du Vernois, M. Echiburú, M. Elsaesser, D. Engel, K. Ergin, T. Espinoza, F. Fang, K. Farfán Carreras, F. Fazzi, A. Feng, C. Feroci, M. Fraija, N. Fraija, S. Franceschini, A. Franco, G.F. Funk, S. Garcia, S. García-González, J.A. Garfias, F. Giacinti, G. Gibilisco, L. Glombitza, J. Goksu, H. Gong, G. González, B.S. Gonzalez, M.M. Goodman, J. Gu, M. Guarino, F. Gupta, S. Haist, F. Hakobyan, H. Han, G. Hansen, P. Harding, J.P. Helo, J. Herzog, I. Hidalgo, H.D. Hinton, J. Hu, K. Huang, D. Huentemeyer, P. Hueyotl-Zahuantitla, F. Iriarte, A. Isaković, J. Isolia, A. Joshi, V. Juryšek, J. Kaci, S. Kieda, D. La Monaca, F. La Mura, G. Lang, R.G. Laspiur, R. Lavitola, L. Lee, J. Leitl, F. Lessio, L. Li, C. Li, J. Li, K. Li, T. Liberti, B. Lin, S. Liu, D. Liu, J. Liu, R. Longo, F. Luo, Y. Lv, J. Macerata, E. Malone, K. Mandat, D. Manganaro, M. Mariani, M. Mariazzi, A. Mariotti, M. Marrodan, T. Martinez, J. Martínez-Huerta, H. Medina, S. Melo, D. Mendes, L.F. Meza, E. Miceli, D. Miozzi, S. Mitchell, A. Molinario, A. Morales-Olivares, O.G. The University of Adelaide North TerraceSA Australia University of Maryland College ParkMD United States Laboratório de Instrumentação e Física Experimental de Partículas - LIP Av. Prof. Gama Pinto 2 Lisboa1649-003 Portugal Departamento de Física Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais 1 Lisboa1049-001 Portugal Physics Division Los Alamos National Laboratory Los AlamosNM United States Instituto de Física Universidad Nacional Autónoma de México Circuito de la Investigación científica C.U. A. Postal 70-364 Cd. de México04510 Mexico Universidad de La Serena Chile Facultad de Ciencias en Física y Matemáticas Universidad Autónoma de Chiapas Chiapas Tuxtla GutiérrezC. P. 29050 Mexico School of physical science University of Science and Technology of China 96 Jinzhai Road Anhui Hefei230026 China TÜBİTAK Research Institute for Fundamental Sciences Gebze41470 Turkey INFN - Sezione di Padova PadovaI-35131 Italy Universidad Nacional de San Antonio Abad del Cusco Av. de la Cultura Nro. 733 Cusco Peru Av. E. Bustillo 9500 Rio Negro San Carlos de Bariloche8400 Argentina Department of Physics Pennsylvania State University University ParkPA United States Institute of Physics The Czech Academy of Sciences Prague Czech Republic Rua Dr. Xavier Sigaud 150 Rio de Janeiro22290-180 Brazil Universidade de São Paulo Instituto de Astronomia Geofísica e Ciências Atmosféricas Departamento de Astronomia Rua do Matão 1226 São Paulo05508-090 Brazil Università di Padova PadovaI-35131 Italy Pontificia Universidad Católica del Perú Av. Universitaria 1801 Lima San Miguel15088 Peru Universidad Nacional de San Agustin de Arequipa Santa Catalina Nro. 117 Arequipa Peru University of Adelaide AdelaideSA Australia Department of Physics and Astronomy University of Rochester RochesterNY United States Instituto de Astronomía Universidad Nacional Autónoma de México Circuito Exterior C.U. A. Postal 70-264 Cd. de México04510 Mexico Ts

Water-Cherenkov detectors (WCD) have been manufactured in Australia by the company AQUAMATE as part of the RD activities for SWGO. They consist of a steel tank frame with a bladder on its interior satisfying the SWGO double-layer tank design. Tanks and bladders have been custom designed to optimally accommodate the bladder inside the tank and with minimal material usage. They are delivered in compact boxes that are easy to transport. These boxes are designed to fit 24 tanks in a 20-foot container. The double-layer tank design has introduced new features to improve the discrimination between gamma-rays and cosmic rays. Some of these features created challenges for the manufacturing. Some units have been delivered to one of Peru’s candidate sites at 4800 m and to Mexico (the HAWC Observatory, 4100 m) for prototype tests in real conditions. In this contribution we will describe manufacturing and construction details of the first SWGO prototype WCD. These details were envisaged to facilitate: the transport of the units, the assembly, the deployment and maintenance activities of the detectors. Furthermore, the units need to be resistant to strong winds, rain, snow and *** costs are scalable with the detector volume. This information could be of interest to other Observatories that are in RD phase, such as the Global Cosmic Ray Observatory (GCOS) for the study of the highest-energy particles in the Universe and the Tau Air Shower Mountain-Based Observatory (TAMBO) for the search of PeV neutrinos. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic rays

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Femtoscopic correlations of identical charged pions and kaons in pp collisions at s=13 TeV with event-shape selection

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physical Review C 2024年第2期109卷 024915-024915页

作者： S. Acharya D. Adamová G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt A. R. Altamura I. Altsybeev J. R. Alvarado M. N. Anaam C. Andrei N. Andreou A. Andronic V. Anguelov F. Antinori P. Antonioli N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli M. Aresti R. Arnaldi J. G. M. C. A. Arneiro I. C. Arsene M. Arslandok A. Augustinus R. Averbeck M. D. Azmi H. Baba A. Badalà J. Bae Y. W. Baek X. Bai R. Bailhache Y. Bailung A. Balbino A. Baldisseri B. Balis D. Banerjee Z. Banoo R. Barbera F. Barile L. Barioglio M. Barlou B. Barman G. G. Barnaföldi L. S. Barnby V. Barret L. Barreto C. Bartels K. Barth E. Bartsch N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden C. Beattie P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova Y. A. V. Beltran G. Bencedi S. Beole Y. Berdnikov A. Berdnikova L. Bergmann M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin M. A. Bhat B. Bhattacharjee L. Bianchi N. Bianchi J. Bielčík J. Bielčíková J. Biernat A. P. Bigot A. Bilandzic G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume G. Boca F. Bock T. Bodova A. Bogdanov S. Boi J. Bok L. Boldizsár M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov A. G. Borquez Carcamo H. Bossi E. Botta Y. E. M. Bouziani L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno M. D. Buckland D. Budnikov H. Buesching S. Bufalino P. Buhler N. Burmasov Z. Buthelezi A. Bylinkin S. A. Bysiak M. Cai H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo S. L. Cantway M. Carabas A. A. Carballo F. Carnesecchi R. Caron L. A. D. Carvalho J. Castillo Castellanos F. Catalano C. Ceballos Sanchez I. Chakaberia P. Chakraborty S. Chandra S. Chapeland M. Chartier S. Chattopadhyay T. Cheng C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato E. Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Nuclear Physics Institute of the Czech Academy of Sciences Husinec-Řež Czech Republic European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy INFN Sezione di Bologna Bologna Italy Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P. J. Šafárik University Košice Slovak Republic Affiliated with an institute covered by a cooperation agreement with CERN Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy University of Houston Houston Texas USA Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany INFN Sezione di Bari Bari Italy Physik Department Technische Universität München Munich Germany High Energy Physics Group Universidad Autónoma de Puebla Puebla Mexico Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania University of Derby Derby United Kingdom Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy Lawrence Berkeley National Laboratory Berkeley California USA SUBATECH IMT Atlantique Nantes Université CNRS-IN2P3 Nantes France Laboratoire de Physique Subatomique et de Cosmologie Université Grenoble-Alpes C

Collective behavior has been observed in high-energy heavy-ion collisions for several decades. Collectivity is driven by the high particle multiplicities that are produced in these collisions. At the CERN Large Hadron Collider (LHC), features of collectivity have also been seen in high-multiplicity proton-proton collisions that can attain particle multiplicities comparable to peripheral Pb-Pb collisions. One of the possible signatures of collective behavior is the decrease of femtoscopic radii extracted from pion and kaon pairs emitted from high-multiplicity collisions with increasing pair transverse momentum. This decrease can be described in terms of an approximate transverse mass scaling. In the present work, femtoscopic analyses are carried out by the ALICE Collaboration on charged pion and kaon pairs produced in pp collisions at s=13TeV from the LHC to study possible collectivity in pp collisions. The event-shape analysis method based on transverse sphericity is used to select for spherical versus jetlike events, and the effects of this selection on the femtoscopic radii for both charged pion and kaon pairs are studied. This is the first time this selection method has been applied to charged kaon pairs. An approximate transverse-mass scaling of the radii is found in all multiplicity ranges studied when the difference in the Lorentz boost for pions and kaons is taken into account. This observation does not support the hypothesis of collective expansion of hot and dense matter that should only occur in high-multiplicity events. A possible alternate explanation of the present results is based on a scenario of common emission conditions for pions and kaons in pp collisions for the multiplicity ranges studied.

关键词： Hadron-hadron interactions Nucleon induced nuclear reactions Particle correlations & fluctuations Relativistic heavy-ion collisions

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The Southern Wide-field Gamma-ray Observatory 38

The Southern Wide-field Gamma-ray Observatory

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38th International Cosmic Ray Conference, ICRC 2023

作者： Conceição, Ruben Abreu, P. Albert, A. Alfaro, R. Alfonso, A. Álvarez, C. An, Q. Angüner, E.O. Arcaro, C. Arceo, R. Arias, S. Arnaldi, H. Assis, P. Ayala Solares, H.A. Bakalova, A. Barres de Almeida, U. Batkovic, I. Bazo, J. Bellido, J. Belmont, E. BenZvi, S.Y. Bernal, A. Bian, W. Bigongiari, C. Bottacini, E. Brogueira, P. Bulik, T. Busetto, G. Caballero-Mora, K.S. Camarri, P. Campos, S. Cao, W. Cao, Z. Cao, Z. Capistrán, T. Cardillo, M. Carquin, E. Carramiñana, A. Castromonte, C. Chang, J. Chaparro, O. Chen, S. Chianese, M. Chiavassa, A. Chytka, L. Colallillo, R. Conceição, R. Consolati, G. Cordero, R. Costa, P.J. Cotzomi, J. Dasso, S. De Angelis, A. Desiati, P. Di Pierro, F. Di Sciascio, G. Díaz Vélez, J.C. Dib, C. Dingus, B. Djuvsland, J. Dobrigkeit, C. Domingues Mendes, L.M. Dorigo, T. Doro, M. dos Reis, A.C. Du Vernois, M. Echiburú, M. Elsaesser, D. Engel, K. Ergin, T. Espinoza, F. Fang, K. Farfán Carreras, F. Fazzi, A. Feng, C. Feroci, M. Fraija, N. Fraija, S. Franceschini, A. Franco, G.F. Funk, S. Garcia, S. García-González, J.A. Garfias, F. Giacinti, G. Gibilisco, L. Glombitza, J. Goksu, H. Gong, G. González, B.S. Gonzalez, M.M. Goodman, J. Gu, M. Guarino, F. Gupta, S. Haist, F. Hakobyan, H. Han, G. Hansen, P. Harding, J.P. Helo, J. Herzog, I. Hidalgo, H.D. Hinton, J. Hu, K. Huang, D. Huentemeyer, P. Hueyotl-Zahuantitla, F. Iriarte, A. Isakovic, J. Isolia, A. Joshi, V. Juryöek, J. Kaci, S. Kieda, D. La Monaca, F. La Mura, G. Lang, R.G. Laspiur, R. Lavitola, L. Lee, J. Leitl, F. Lessio, L. Li, C. Li, J. Li, K. Li, T. Liberti, B. Lin, S. Liu, D. Liu, J. Liu, R. Longo, F. Luo, Y. Lv, J. Macerata, E. Malone, K. Mandat, D. Manganaro, M. Mariani, M. Mariazzi, A. Mariotti, M. Marrodan, T. Martinez, J. Martínez-Huerta, H. Medina, S. Melo, D. Mendes, L.F. Meza, E. Miceli, D. Miozzi, S. Mitchell, A. Molinario, A. Morales-Olivares, O.G. Moreno, E. Morselli, A. LIP - Laboratório de Instrumentação e Física Experimental de Partículas Lisbon Portugal Departamento de Física Instituto Superior Técnico Universidade de Lisboa Lisbon Portugal Laboratório de Instrumentação de Física Experimental de Partículas - LIP Av. Prof. Gama Pinto 2 Lisboa1649-003 Portugal Departamento de Física Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais 1 Lisboa1049-001 Portugal Physics Division Los Alamos National Laboratory Los AlamosNM United States Instituto de Física Universidad Nacional Autónoma de México Circuito de la Investigación Científica C.U. A. Postal 70-364 Cd. de México04510 Mexico Universidad de La Serena Chile Facultad de Ciencias en Física y Matemáticas Universidad Autónoma de Chiapas Chiapas Tuxtla GutiérrezC. P. 29050 Mexico School of physical science University of Science and Technology of China 96 Jinzhai Road Anhui Hefei230026 China TÜBITAK Research Institute for Fundamental Sciences Gebze41470 Turkey INFN - Sezione di Padova PadovaI-35131 Italy Universidad Nacional de San Antonio Abad del Cusco Av. de la Cultura Nro. 733 Cusco Peru Av. E. Bustillo 9500 Rio Negro San Carlos de Bariloche8400 Argentina Department of Physics Pennsylvania State University University ParkPA United States Institute of Physics The Czech Academy of Sciences Prague Czech Republic Rua Dr. Xavier Sigaud 150 Rio de Janeiro22290-180 Brazil Universidade de São Paulo Instituto de Astronomia Geofísica e Ciências Atmosféricas Departamento de Astronomia Rua do Matão 1226 São Paulo05508-090 Brazil Università di Padova PadovaI-35131 Italy Pontificia Universidad Católica del Perú Av. Universitaria 1801 Lima San Miguel15088 Peru Universidad Nacional de San Agustin de Arequipa Santa Catalina Nro. 117 Arequipa Peru University of Adelaide AdelaideSA Australia Department of Physics and Astronomy University of Rochester RochesterNY United States Instituto de Astronomía Universidad Nacional Autónoma de México

The Southern Wide-field Gamma-ray Observatory (SWGO) is an R&D project to plan and design the next observatory to detect gamma rays in the Southern hemisphere. The experiment, planned to be placed at an altitude greater than 4400 m, is primarily based on water Cherenkov detectors units and is expected to measure gamma rays from a few hundred GeV up to the PeV scale. SWGO will complement CTA and the existing ground-based particle detectors of the Northern Hemisphere, namely HAWC and LHAASO, having a rich science programme. The collaboration is highly invested in evaluating different detector and array configurations, prototyping, and site search. In this presentation, I shall present an overview of the project’s activities, achievements and future plans. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic ray detectors

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Sb for gamma / hadron separation in SWGO 38

Sb for gamma / hadron separation in SWGO

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38th International Cosmic Ray Conference, ICRC 2023

作者： Vergara Quispe, I.D. Hansen, P.M. Nellen, L. Mariazzi, A.G. Melo, D.G. Abreu, P. Albert, A. Alfaro, R. Alfonso, A. Álvarez, C. An, Q. Angüner, E.O. Arcaro, C. Arceo, R. Arias, S. Arnaldi, H. Assis, P. Ayala Solares, H.A. Bakalova, A. de Almeida, U. Barres Batkovic, I. Bazo, J. Bellido, J. Belmont, E. BenZvi, S.Y. Bernal, A. Bian, W. Bigongiari, C. Bottacini, E. Brogueira, P. Bulik, T. Busetto, G. Caballero-Mora, K.S. Camarri, P. Campos, S. Cao, W. Cao, Z. Cao, Z. Capistrán, T. Cardillo, M. Carquin, E. Carramiñana, A. Castromonte, C. Chang, J. Chaparro, O. Chen, S. Chianese, M. Chiavassa, A. Chytka, L. Colallillo, R. Conceição, R. Consolati, G. Cordero, R. Costa, P.J. Cotzomi, J. Dasso, S. De Angelis, A. Desiati, P. Di Pierro, F. Di Sciascio, G. Díaz Vélez, J.C. Dib, C. Dingus, B. Djuvsland, J. Dobrigkeit, C. Domingues Mendes, L.M. Dorigo, T. Doro, M. dos Reis, A.C. Du Vernois, M. Echiburú, M. Elsaesser, D. Engel, K. Ergin, T. Espinoza, F. Fang, K. Farfán Carreras, F. Fazzi, A. Feng, C. Feroci, M. Fraija, N. Fraija, S. Franceschini, A. Franco, G.F. Funk, S. Garcia, S. García-González, J.A. Garfias, F. Giacinti, G. Gibilisco, L. Glombitza, J. Goksu, H. Gong, G. González, B.S. Gonzalez, M.M. Goodman, J. Gu, M. Guarino, F. Gupta, S. Haist, F. Hakobyan, H. Han, G. Hansen, P. Harding, J.P. Helo, J. Herzog, I. d. Hidalgo, H. Hinton, J. Hu, K. Huang, D. Huentemeyer, P. Hueyotl-Zahuantitla, F. Iriarte, A. Isakovic, J. Isolia, A. Joshi, V. Juryšek, J. Kaci, S. Kieda, D. La Monaca, F. La Mura, G. Lang, R.G. Laspiur, R. Lavitola, L. Lee, J. Leitl, F. Lessio, L. Li, C. Li, J. Li, K. Li, T. Liberti, B. Lin, S. Liu, D. Liu, J. Liu, R. Longo, F. Luo, Y. Lv, J. Macerata, E. Malone, K. Mandat, D. Manganaro, M. Mariani, M. Mariazzi, A. Mariotti, M. Marrodan, T. Martinez, J. Martínez-Huerta, H. Medina, S. Melo, D. Mendes, L.F. Meza, E. Miceli, D. Laboratório de Instrumentação e Física Experimental de Partículas - LIP Av. Prof. Gama Pinto 2 Lisboa1649-003 Portugal Departamento de Física Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais 1 Lisboa1049-001 Portugal Physics Division Los Alamos National Laboratory Los AlamosNM United States Instituto de Física Universidad Nacional Autónoma de México Circuito de la Investigación científica C.U. A. Postal 70-364 Cd. de México04510 Mexico Universidad de La Serena Chile Facultad de Ciencias en Física y Matemáticas Universidad Autónoma de Chiapas Tuxtla Gutiérrez Chiapas29050 Mexico School of Physical Science University of Science and Technology of China 96 Jinzhai Road Anhui Hefei230026 China TÜBITAK Research Institute for Fundamental Sciences Gebze41470 Turkey INFN Sezione di Padova PadovaI-35131 Italy Universidad Nacional de San Antonio Abad del Cusco Av. de la Cultura Nro. 733 Cusco Peru Av. E. Bustillo 9500 San Carlos de Bariloche Rio Negro8400 Argentina Department of Physics Pennsylvania State University University ParkPA United States Institute of Physics The Czech Academy of Sciences Prague Czech Republic Rua Dr. Xavier Sigaud 150 Rio de Janeiro22290-180 Brazil Universidade de São Paulo Instituto de Astronomia Geofísica e Ciências Atmosféricas Departamento de Astronomia Rua do Matão 1226 São Paulo05508-090 Brazil Università di Padova PadovaI-35131 Italy Pontificia Universidad Católica del Perú Av. Universitaria 1801 San Miguel Lima15088 Peru Universidad Nacional de San Agustin de Arequipa Santa Catalina Nro. 117. Arequipa Peru University of Adelaide AdelaideSA Australia Department of Physics and Astronomy University of Rochester RochesterNY United States Instituto de Astronomía Universidad Nacional Autónoma de México Circuito Exterior C.U. A. Postal 70-264 Cd. de México04510 Mexico Tsung-Dao Lee Institute School of Physics and Astronomy Shanghai Jiao Tong University 520 Shengrong Road Shanghai

The Southern Wide-field Gamma-ray Observatory (SWGO) is an international collaboration working on a ground-based gamma-ray observatory that will be located in the southern hemisphere. A crucial step in the analysis is to identify the showers produced by gamma rays and separate them from the abundant background of hadronic showers. In this work, we propose to adapt the observable, Sb, used successfully to composition studies in the Pierre Auger Observatory to the SWGO detector. This observable takes into account the signal and the position of each triggered detector. It characterizes the shape of the lateral distribution of the signal, which depends on the nature of the primary particle. The value of Sb is therefore suited to identify gamma induced showers and to reject the more frequent hadronic showers. This analysis has been performed using a scaling factor to link the observable, Sb, between the central and outrigger array. Also we explore how this new observable improves the separation of primary proton and gamma-induced air showers in terms of the merit factor. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Hadrons

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Updates on the Lake Design for SWGO 38

Updates on the Lake Design for SWGO

引用

38th International Cosmic Ray Conference, ICRC 2023

作者： Goksu, Hazal Abreu, P. Albert, A. Alfaro, R. Alfonso, A. Álvarez, C. An, Q. Angüner, E.O. Arcaro, C. Arceo, R. Arias, S. Arnaldi, H. Assis, P. Ayala Solares, H.A. Bakalova, A. Barres de Almeida, U. Batkovic, I. Bazo, J. Bellido, J. Belmont, E. BenZvi, S.Y. Bernal, A. Bian, W. Bigongiari, C. Bottacini, E. Brogueira, P. Bulik, T. Busetto, G. Caballero-Mora, K.S. Camarri, P. Campos, S. Cao, W. Cao, Z. Cao, Z. Capistrán, T. Cardillo, M. Carquin, E. Carramiñana, A. Castromonte, C. Chang, J. Chaparro, O. Chen, S. Chianese, M. Chiavassa, A. Chytka, L. Colallillo, R. Conceição, R. Consolati, G. Cordero, R. Costa, P.J. Cotzomi, J. Dasso, S. De Angelis, A. Desiati, P. Di Pierro, F. Di Sciascio, G. Díaz Vélez, J.C. Dib, C. Dingus, B. Djuvsland, J. Dobrigkeit, C. Domingues Mendes, L.M. Dorigo, T. Doro, M. dos Reis, A.C. Du Vernois, M. Echiburú, M. Elsaesser, D. Engel, K. Ergin, T. Espinoza, F. Fang, K. Farfán Carreras, F. Fazzi, A. Feng, C. Feroci, M. Fraija, N. Fraija, S. Franceschini, A. Franco, G.F. Funk, S. Garcia, S. García-González, J.A. Garfias, F. Giacinti, G. Gibilisco, L. Glombitza, J. Goksu, H. Gong, G. González, B.S. Gonzalez, M.M. Goodman, J. Gu, M. Guarino, F. Gupta, S. Haist, F. Hakobyan, H. Han, G. Hansen, P. Harding, J.P. Helo, J. Herzog, I. d. Hidalgo, H. Hinton, J. Hu, K. Huang, D. Huentemeyer, P. Hueyotl-Zahuantitla, F. Iriarte, A. Isaković, J. Isolia, A. Joshi, V. Juryšek, J. Kaci, S. Kieda, D. La Monaca, F. La Mura, G. Lang, R.G. Laspiur, R. Lavitola, L. Lee, J. Leitl, F. Lessio, L. Li, C. Li, J. Li, K. Li, T. Liberti, B. Lin, S. Liu, D. Liu, J. Liu, R. Longo, F. Luo, Y. Lv, J. Macerata, E. Malone, K. Mandat, D. Manganaro, M. Mariani, M. Mariazzi, A. Mariotti, M. Marrodan, T. Martinez, J. Martínez-Huerta, H. Medina, S. Melo, D. Mendes, L.F. Meza, E. Miceli, D. Miozzi, S. Mitchell, A. Molinario, A. Morales-Olivares, O.G. Moreno, E. Morselli, A. Laboratório de Instrumentação de Física Experimental de Partículas - LIP Av. Prof. Gama Pinto 2 Lisboa1649-003 Portugal Departamento de Física Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais 1 Lisboa1049-001 Portugal Physics Division Los Alamos National Laboratory Los AlamosNM United States Instituto de Física Universidad Nacional Autónoma de México Circuito de la Investigación Científica C.U. A. Postal 70-364 Cd. de México04510 Mexico Universidad de La Serena Chile Facultad de Ciencias en Física y Matemáticas Universidad Autónoma de Chiapas Chiapas Tuxtla GutiérrezC. P. 29050 Mexico School of physical science University of Science and Technology of China 96 Jinzhai Road Anhui Hefei230026 China TÜBİTAK Research Institute for Fundamental Sciences Gebze41470 Turkey INFN - Sezione di Padova PadovaI-35131 Italy Universidad Nacional de San Antonio Abad del Cusco Av. de la Cultura Nro. 733 Cusco Peru Av. E. Bustillo 9500 Rio Negro San Carlos de Bariloche8400 Argentina Department of Physics Pennsylvania State University University ParkPA United States Institute of Physics The Czech Academy of Sciences Prague Czech Republic Rua Dr. Xavier Sigaud 150 Rio de Janeiro22290-180 Brazil Universidade de São Paulo Instituto de Astronomia Geofísica e Ciências Atmosféricas Departamento de Astronomia Rua do Matão 1226 São Paulo05508-090 Brazil Università di Padova PadovaI-35131 Italy Pontificia Universidad Católica del Perú Av. Universitaria 1801 Lima San Miguel15088 Peru Universidad Nacional de San Agustin de Arequipa Santa Catalina Nro. 117 Arequipa Peru University of Adelaide AdelaideSA Australia Department of Physics and Astronomy University of Rochester RochesterNY United States Instituto de Astronomía Universidad Nacional Autónoma de México Circuito Exterior C.U. A. Postal 70-264 Cd. de México04510 Mexico Tsung-Dao Lee Institute School of Physics and Astronomy Shanghai Jiao Tong University 520 Shengrong Road Sha

The lake concept is one of the detector design options considered for the Southern Wide-field Gamma-ray Observatory (SWGO), a next-generation high altitude gamma-ray observatory in the southern hemisphere consisting of an array of water Cherenkov detectors. With its wide energy range, wide field of view, large duty cycle and location it will complement the other existing and planned gamma-ray observatories. In the lake concept, instead of having tanks filled with water, bladders filled with clean water are deployed near the surface of a natural or artificial lake. Each bladder is a light-tight stand-alone unit containing one or more photosensors. The prototyping efforts for the lake concept are in an advanced stage with multiple options and factors, such as the impact of chosen materials on water quality, being considered. In this contribution, we will give an update on the planning and prototyping studies for this detector design option. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic ray detectors

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