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arXiv 2018年

作者： Álvarez-Muñiz, Jaime batista, Rafael Alves balagopal, Aswathi V. bolmont, Julien bustamante, Mauricio Jr, Washington Carvalho Charrier, Didier Cognard, Ismaël Decoene, Valentin Denton, Peter b. de Jong, sijbrand de Vries, Krijn D. engel, Ralph Fang, Ke Finley, Chad Gabici, stefano Gou, Quanbu Gu, Junhua Guépin, Claire Hu, Hongbo Huang, Yan Kotera, Kumiko Le Coz, sandra Lenain, Jean-Philippe Lü, Guoliang Martineau-Huynh, Olivier Mostafá, Miguel Mottez, Fabrice Murase, Kohta Niess, Valentin Oikonomou, Foteini Pierog, Tanguy Qian, Xiangli Qin, bo Ran, Duan Renault-Tinacci, Nicolas Roth, Markus schröder, Frank G. schüssler, Fabian Tasse, Cyril Timmermans, Charles Tueros, Matías Wu, Xiangping Zarka, Philippe Zech, Andreas Zhang, b. Theodore Zhang, Jianli Zhang, Yi Zheng, Qian Zilles, Anne Departamento de Física de Partículas Instituto Galego de Física de Altas Enerxías Universidad de Santiago de Compostela Santiago de Compostela15782 Spain Instituto de Astronomia Geofísica e Ciências Atmosféricas Universidade de São Paulo Rua do Matão 1226 São Paulo-SP05508-090 Brazil Department of Physics – Astrophysics University of Oxford DWB Keble Road OxfordOX1 3RH United Kingdom KarlsruheD-76021 Germany 4 place Jussieu Paris Cedex 5F-75252 France Niels Bohr International Academy and DARK Niels Bohr Institute Copenhagen2100 Denmark Discovery Center Niels Bohr Institute Copenhagen2100 Denmark Dep. of Physics Ohio State University ColumbusOH43210 United States Universidade de Santiago de Compostela Santiago de Compostela15782 Spain SUBATECH Institut Mines-Telecom Atlantique – CNRS/IN2P3 Université de Nantes Nantes France Laboratoire de Physique et Chimie de l’Environnement et de l’Espace LPC2E CNRS-Université d’Orléans OrléansF-45071 France Station de Radioastronomie de Nançay Observatoire de Paris CNRS/INSU NançayF-18330 France Sorbonne Université UMR 7095 Institut d’Astrophysique de Paris 98 bis bd Arago Paris75014 France Radboud Universiteit Nijmegen Netherlands Nationaal Instituut voor Kernfysica en Hoge Energie Fysica Nikhef Netherlands IIHE/ELEM Vrije Universiteit Brussel Pleinlaan 2 Brussels1050 Belgium KarlsruheD-76021 Germany Einstein Fellow Stanford University StanfordCA94305 United States Department of Astronomy University of Maryland College ParkMD20742-2421 United States Joint Space-Science Institute College ParkMD20742-2421 United States Oskar Klein Centre Stockholm University StockholmSE-10691 Sweden Department of Physics Stockholm University StockholmSE-10691 Sweden Univ. Paris Diderot CNRS/IN2P3 CEA/Irfu Obs. de Paris Sorbonne Paris Cité France Institute of High Energy Physics Chinese Academy of Sciences 19B YuquanLu Beijing100049 China National Astronomical Observatories Chinese Ac

The Giant Radio Array for Neutrino Detection (GRAND)1 is a planned large-scale ob.e.vatory of ultra-high-energy (UHe) cosmic particles — cosmic rays, gamma rays, and neutrinos with energies exceeding 108 GeV. Its ultimate goal is to solve the long-standing mystery of the origin of UHe cosmic rays. It will do so by detecting an unprecedented number of UHeCRs and by looking with unmatched sensitivity for the undiscovered UHe neutrinos and gamma rays associated to them. Three key features of GRAND will make this possib.e. its large exposure at ultra-high energies, sub-degree angular resolution, and sensitivity to the unique signals made by UHe neutrinos. The strategy of GRAND is to detect the radio emission coming from large particle showers that develop in the terrestrial atmosphere — extensive air showers — as a result of the interaction of UHe cosmic rays, gamma, rays, and neutrinos. To achieve this, GRAND will be the largest array of radio antennas ever built. The relative affordability of radio antennas makes the scale of construction possib.e. GRAND will build on years of progress in the field of radio-detection and apply the large body of technological, theoretical, and numerical advances, for the first time, to the radio-detection of air showers initiated by UHe neutrinos. The design of GRAND will be modular, consisting of several independent sub-arrays, each of 10 000 radio antennas deployed over 10 000 km2 in radio-quiet locations. A staged construction plan ensures that key techniques are progressively validated, while simultaneously achieving important science goals in UHeCR physics, radioastronomy, and cosmology early during construction. Already by 2025, using the first sub-array of 10 000 antennas, GRAND could discover the long-sought cosmogenic neutrinos — produced by interactions of ultra-high-energy cosmic-rays with cosmic photon fields — if their flux is as high as presently allowed, by reaching a sensitivity comparab.e.to planned upgraded versions o

关键词： Gamma rays

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erratum to: search for heavy resonances decaying into a W or Z boson and a Higgs boson in final states with leptons and b-jets in 36 fb−1 of TeV pp collisions with the ATLAs detector

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Journal of High energy Physics 2018年第11期2018卷 1-18页

作者： Aaboud, M. Aad, G. Abbott, b. Abdinov, O. Abeloos, b. Abidi, s. H. AbouZeid, O. s. Abraham, N. L. Abramowicz, H. Ab.e., H. Ab.e., R. Abulaiti, Y. Acharya, b. s. Adachi, s. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A. A. Afik, Y. Agatonovic-Jovin, T. Agheorghiesei, C. Aguilar-saavedra, J. A. Ahlen, s. P. Ahmadov, F. Aielli, G. Akatsuka, s. Akerstedt, H. Åkesson, T. P. A. Akilli, e. Akimov, A. V. Alberghi, G. L. Albert, J. Albicocco, P. Alconada Verzini, M. J. Alderweireldt, s. C. Aleksa, M. Aleksandrov, I. N. Alexa, C. Alexander, G. Alexopoulos, T. Alhroob, M. Ali, b. Aliev, M. Alimonti, G. Alison, J. Alkire, s. P. Allbrooke, b. M. M. Allen, b. W. Allport, P. P. Aloisio, A. Alonso, A. Alonso, F. Alpigiani, C. Alshehri, A. A. Alstaty, M. I. Alvarez Gonzalez, b. Álvarez Piqueras, D. Alviggi, M. G. Amadio, b. T. Amaral Coutinho, Y. Amelung, C. Amidei, D. Amor Dos santos, s. P. Amoroso, s. Amundsen, G. Anastopoulos, C. Ancu, L. s. Andari, N. Andeen, T. Anders, C. F. Anders, J. K. Anderson, K. J. Andreazza, A. Andrei, V. Angelidakis, s. Angelozzi, I. Angerami, A. Anisenkov, A. V. Anjos, N. Annovi, A. Antel, C. Antonelli, M. Antonov, A. Antrim, D. J. Anulli, F. Aoki, M. Aperio bella, L. Arabidze, G. Arai, Y. Araque, J. P. Araujo Ferraz, V. Arce, A. T. H. Ardell, R. e. Arduh, F. A. Arguin, J-F. Argyropoulos, s. Arik, M. Armbruster, A. J. Armitage, L. J. Arnaez, O. Arnold, H. Arratia, M. Arslan, O. Artamonov, A. Artoni, G. Artz, s. Asai, s. Asbah, N. Ashkenazi, A. Asquith, L. Assamagan, K. Astalos, R. Atkinson, M. Atlay, N. b. Augsten, K. Avolio, G. Axen, b. Ayoub, M. K. Azuelos, G. baas, A. e. baca, M. J. bachacou, H. bachas, K. backes, M. bagnaia, P. bahmani, M. bahrasemani, H. baines, J. T. bajic, M. baker, O. K. bakker, P. J. baldin, e. M. balek, P. balli, F. balunas, W. K. banas, e. bandyopadhyay, A. banerjee, sw. bannoura, A. A. e. barak, L. barberio, e. L. barberis, D. barbero, M. barillari, T. barisits, M-s barkeloo, J. T. barklow, T. barlow, N. barnes, s. L. barnett, b. M. barnett, R. M. barnovs Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman United States of America Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics University of Toronto Toronto Canada Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz United States of America Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel Center for High Energy Physics University of Oregon Eugene United States of America Department of Physics Stockholm University Stockholm Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Department of Physics King’s College London London United Kingdom International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb United States of America Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Institute of Physics University of Belgrade Belgrade Serbia Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Laboratório de Instrumentação e Física Experimental de Partículas – LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos Universidad de Granada Granada Portugal Department of Physics Boston University Boston United States of America Joi

One correction is noted for the paper. The exclusion limits for the gluon-gluon fusion production of an A boson reported in the conclusions did not correspond to the exclusion plots shown in figure 6a.

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search for Resonant and Nonresonant Higgs boson Pair Production in the bb¯τ+τ− Decay Channel in pp Collisions at s=13 TeV with the ATLAs Detector

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Physical Review Letters 2018年第19期121卷 191801-191801页

作者： M. Aaboud G. Aad b. Abbott O. Abdinov b. Abeloos D. K. Abhayasinghe s. H. Abidi O. s. AbouZeid N. L. Abraham H. Abramowicz H. Ab.e. Y. Abulaiti b. s. Acharya s. Adachi L. Adamczyk J. Adelman M. Adersberger A. Adiguzel T. Adye A. A. Affolder Y. Afik C. Agheorghiesei J. A. Aguilar-saavedra F. Ahmadov G. Aielli s. Akatsuka T. P. A. Åkesson e. Akilli A. V. Akimov G. L. Alberghi J. Albert P. Albicocco M. J. Alconada Verzini s. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos M. Alhroob b. Ali G. Alimonti J. Alison s. P. Alkire C. Allaire b. M. M. Allbrooke b. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani A. A. Alshehri M. I. Alstaty b. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi b. T. Amadio Y. Amaral Coutinho L. Ambroz C. Amelung D. Amidei s. P. Amor Dos santos s. Amoroso C. s. Amrouche C. Anastopoulos L. s. Ancu N. Andari T. Andeen C. F. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei C. R. Anelli s. Angelidakis I. Angelozzi A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo L. Aperio bella G. Arabidze J. P. Araque V. Araujo Ferraz R. Araujo Pereira A. T. H. Arce R. e. Ardell F. A. Arduh J-F. Arguin s. Argyropoulos A. J. Armbruster L. J. Armitage A Armstrong O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni s. Artz s. Asai N. Asbah A. Ashkenazi e. M. Asimakopoulou L. Asquith K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay K. Augsten G. Avolio R. Avramidou M. K. Ayoub G. Azuelos A. e. baas M. J. baca H. bachacou K. bachas M. backes P. bagnaia M. bahmani H. bahrasemani A. J. bailey J. T. baines M. bajic C. bakalis O. K. baker P. J. bakker D. bakshi Gupta e. M. baldin P. balek F. balli W. K. balunas J. balz e. banas A. bandyopadhyay s. banerjee A. A. e. bannoura L. barak W. M. barbe e. L. barberio D. barberis M. barbero T. barillari M-s. barisits J. barkeloo T. barklow N. barlow R. barnea s. L. barnes b. M. barnett R. M. barnett Z. barnovska-b.e.essy A. baroncelli Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Université Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto Ontario Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Departamento de Física Teorica y del Cosmos Universidad de Granada Granada (Spain) Spain Laboratório de Instrumentação e Física Experimental de Partículas - LIP Portugal Joint Institute for Nuclear Research Dubna Russia INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Università di Roma T

A search for resonant and nonresonant pair production of Higgs bosons in the bb¯τ+τ− final state is presented. The search uses 36.1 fb−1 of pp collision data with s=13 TeV recorded by the ATLAs experiment at the LHC in 2015 and 2016. Decays of the τ-lepton pairs with at least one τ lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is ob.e.ved in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doub.e.s and a Randall-sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305 GeVeV in the simplified hMssM minimal supersymmetric model for tanβ=2 and excluding bulk Randall-sundrum gravitons GKK in the mass range 325 GeVeV for k/M¯Pl=1.

关键词： extensions of Higgs sector spontaneous symmetry b.e.king Higgs bosons Hypothetical scalars

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Combination of the searches for Pair-Produced Vectorlike Partners of the Third-Generation Quarks at s=13 TeV with the ATLAs Detector

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Physical Review Letters 2018年第21期121卷 211801-211801页

作者： M. Aaboud G. Aad b. Abbott O. Abdinov b. Abeloos D. K. Abhayasinghe s. H. Abidi O. s. AbouZeid N. L. Abraham H. Abramowicz H. Ab.e. Y. Abulaiti b. s. Acharya s. Adachi L. Adam L. Adamczyk J. Adelman M. Adersberger A. Adiguzel T. Adye A. A. Affolder Y. Afik C. Agheorghiesei J. A. Aguilar-saavedra F. Ahmadov G. Aielli s. Akatsuka T. P. A. Åkesson e. Akilli A. V. Akimov G. L. Alberghi J. Albert P. Albicocco M. J. Alconada Verzini s. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos M. Alhroob b. Ali G. Alimonti J. Alison s. P. Alkire C. Allaire b. M. M. Allbrooke b. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani A. A. Alshehri M. I. Alstaty b. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi b. T. Amadio Y. Amaral Coutinho A. Amb.e. L. Ambroz C. Amelung D. Amidei s. P. Amor Dos santos s. Amoroso C. s. Amrouche C. Anastopoulos L. s. Ancu N. Andari T. Andeen C. F. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei C. R. Anelli s. Angelidakis I. Angelozzi A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo L. Aperio bella G. Arabidze J. P. Araque V. Araujo Ferraz R. Araujo Pereira A. T. H. Arce R. e. Ardell F. A. Arduh J-F. Arguin s. Argyropoulos A. J. Armbruster L. J. Armitage A. Armstrong O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni s. Artz s. Asai N. Asbah e. M. Asimakopoulou L. Asquith K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay K. Augsten G. Avolio R. Avramidou M. K. Ayoub A. M. Azoulay G. Azuelos A. e. baas M. J. baca H. bachacou K. bachas M. backes P. bagnaia M. bahmani H. bahrasemani A. J. bailey J. T. baines M. bajic C. bakalis O. K. baker P. J. bakker D. bakshi Gupta s. balaji e. M. baldin P. balek F. balli W. K. balunas J. balz e. banas A. bandyopadhyay s. banerjee A. A. e. bannoura L. barak W. M. barbe e. L. barberio D. barberis M. barbero T. barillari M-s. barisits J. barkeloo T. barklow R. barnea s. L. barnes b. M. barnett R. M. barnett Z. barnovska-ble Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Université Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto Ontario Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics University of Tokyo Tokyo Japan Institut für Physik Universität Mainz Mainz Germany AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Departamento de Física Teorica y del Cosmos Universidad de Granada Granada (Spain) Spain Laboratório de Instrumentação e Física Experimental de Partículas—LIP Portugal Joint Institute for Nuclear Research Dubna Russia INFN Sezione di Roma Tor Vergat

A combination of the searches for pair-produced vectorlike partners of the top and bottom quarks in various decay channels (T→Zt/Wb/Ht, b→Zb/Wt/Hb) is performed using 36.1 fb−1 of pp collision data at s=13 TeV with the ATLAs detector at the Large Hadron Collider. The ob.e.ved data are found to be in good agreement with the standard model background prediction in all individual searches. Therefore, combined 95% confidence-level upper limits are set on the production cross section for a range of vectorlike quark scenarios, significantly improving upon the reach of the individual searches. Model-independent limits are set assuming the vectorlike quarks decay to standard model particles. A singlet T is excluded for masses below 1.31 TeV and a singlet b is excluded for masses below 1.22 TeV. Assuming a weak isospin (T,b) doub.e. and |VTb|≪|Vtb|, T and b masses below 1.37 TeV are excluded.

关键词： extensions of fermion sector Particle production Hypothetical fermions Quarks Hadron colliders Particle data analysis

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Ob.e.vation of Centrality-Dependent Acoplanarity for Muon Pairs Produced via Two-Photon scattering in Pb+Pb Collisions at sNN=5.02 TeV with the ATLAs Detector

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Physical Review Letters 2018年第21期121卷 212301-212301页

作者： M. Aaboud G. Aad b. Abbott O. Abdinov b. Abeloos D. K. Abhayasinghe s. H. Abidi O. s. AbouZeid N. L. Abraham H. Abramowicz H. Ab.e. Y. Abulaiti b. s. Acharya s. Adachi L. Adamczyk J. Adelman M. Adersberger A. Adiguzel T. Adye A. A. Affolder Y. Afik C. Agheorghiesei J. A. Aguilar-saavedra F. Ahmadov G. Aielli s. Akatsuka T. P. A. Åkesson e. Akilli A. V. Akimov G. L. Alberghi J. Albert P. Albicocco M. J. Alconada Verzini s. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos M. Alhroob b. Ali G. Alimonti J. Alison s. P. Alkire C. Allaire b. M. M. Allbrooke b. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani A. A. Alshehri M. I. Alstaty b. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi b. T. Amadio Y. Amaral Coutinho L. Ambroz C. Amelung D. Amidei s. P. Amor Dos santos s. Amoroso C. s. Amrouche C. Anastopoulos L. s. Ancu N. Andari T. Andeen C. F. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei C. R. Anelli s. Angelidakis I. Angelozzi A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo L. Aperio bella G. Arabidze J. P. Araque V. Araujo Ferraz R. Araujo Pereira A. T. H. Arce R. e. Ardell F. A. Arduh J-F. Arguin s. Argyropoulos A. J. Armbruster L. J. Armitage A. Armstrong O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni s. Artz s. Asai N. Asbah A. Ashkenazi e. M. Asimakopoulou L. Asquith K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay K. Augsten G. Avolio R. Avramidou M. K. Ayoub G. Azuelos A. e. baas M. J. baca H. bachacou K. bachas M. backes P. bagnaia M. bahmani H. bahrasemani A. J. bailey J. T. baines M. bajic C. bakalis O. K. baker P. J. bakker D. bakshi Gupta e. M. baldin P. balek F. balli W. K. balunas J. balz e. banas A. bandyopadhyay s. banerjee A. A. e. bannoura L. barak W. M. barbe e. L. barberio D. barberis M. barbero T. barillari M-s. barisits J. barkeloo T. barklow N. barlow R. barnea s. L. barnes b. M. barnett R. M. barnett Z. barnovska-b.e.essy A. baroncelli Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Université Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto Ontario Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Departamento de Física Teorica y del Cosmos Universidad de Granada Granada (Spain) Spain Laboratório de Instrumentação e Física Experimental de Partículas - LIP Portugal Joint Institute for Nuclear Research Dubna Russia INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Università di Roma T

This Letter presents a measurement of γγ→μ+μ− production in Pb+Pb collisions recorded by the ATLAs detector at the Large Hadron Collider at sNN=5.02 TeV with an integrated luminosity of 0.49 nb−1. The azimuthal angle and transverse momentum correlations between the muons are measured as a function of collision centrality. The muon pairs are produced from γγ through the interaction of the large electromagnetic fields of the nuclei. The contribution from background sources of muon pairs is removed using a template fit method. In peripheral collisions, the muons exhibit a strong back-to-back correlation consistent with previous measurements of muon pair production in ultraperipheral collisions. The angular correlations are ob.e.ved to broaden significantly in central collisions. The modifications are qualitatively consistent with rescattering of the muons while passing through the hot matter produced in the collision.

关键词： Relativistic heavy-ion collisions

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search for Low-Mass Dijet Resonances Using Trigger-Level Jets with the ATLAs Detector in pp Collisions at s=13 TeV

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Physical Review Letters 2018年第8期121卷 081801-081801页

作者： M. Aaboud G. Aad b. Abbott O. Abdinov b. Abeloos s. H. Abidi O. s. AbouZeid N. L. Abraham H. Abramowicz H. Ab.e. Y. Abulaiti b. s. Acharya s. Adachi L. Adamczyk J. Adelman M. Adersberger A. Adiguzel T. Adye A. A. Affolder Y. Afik C. Agheorghiesei J. A. Aguilar-saavedra F. Ahmadov G. Aielli s. Akatsuka T. P. A. Åkesson e. Akilli A. V. Akimov G. L. Alberghi J. Albert P. Albicocco M. J. Alconada Verzini s. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa G. Alexander T. Alexopoulos M. Alhroob b. Ali G. Alimonti J. Alison s. P. Alkire C. Allaire b. M. M. Allbrooke b. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani A. A. Alshehri M. I. Alstaty b. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi b. T. Amadio Y. Amaral Coutinho L. Ambroz C. Amelung D. Amidei s. P. Amor Dos santos s. Amoroso C. s. Amrouche C. Anastopoulos L. s. Ancu N. Andari T. Andeen C. F. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei s. Angelidakis I. Angelozzi A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony M. Antonelli D. J. A. Antrim F. Anulli M. Aoki L. Aperio bella G. Arabidze Y. Arai J. P. Araque V. Araujo Ferraz R. Araujo Pereira A. T. H. Arce R. e. Ardell F. A. Arduh J-F. Arguin s. Argyropoulos A. J. Armbruster L. J. Armitage O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni s. Artz s. Asai N. Asbah A. Ashkenazi e. M. Asimakopoulou L. Asquith K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay K. Augsten G. Avolio R. Avramidou b. Axen M. K. Ayoub G. Azuelos A. e. baas M. J. baca H. bachacou K. bachas M. backes P. bagnaia M. bahmani H. bahrasemani A. J. bailey J. T. baines M. bajic O. K. baker P. J. bakker D. bakshi Gupta e. M. baldin P. balek F. balli W. K. balunas e. banas A. bandyopadhyay s. banerjee A. A. e. bannoura L. barak W. M. barbe e. L. barberio D. barberis M. barbero T. barillari M-s. barisits J. barkeloo T. barklow N. barlow R. barnea s. L. barnes b. M. barnett R. M. barnett Z. barnovska-b.e.essy A. baroncelli G. barone A. J. barr L. barranco Navarro F. barreiro Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Université Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics University of Toronto Toronto Ontario Canada Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Departamento de Física Teorica y del Cosmos Universidad de Granada Granada (Spain) Spain Laboratório de Instrumentação e Física Experimental de Partículas - LIP Portugal Joint Institute for Nuclear Research Dubna Russia INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Università di Roma Tor Vergata Roma Italy Faculty of Science Kyoto University Kyoto Japan Fysiska institutionen Lunds universitet Lund Sweden Département de Phys

searches for dijet resonances with sub-TeV masses using the ATLAs detector at the Large Hadron Collider can be statistically limited by the bandwidth availab.e.to inclusive single-jet triggers, whose data-collection rates at low transverse momentum are much lower than the rate from standard model multijet production. This Letter describes a new search for dijet resonances where this limitation is overcome by recording only the event information calculated by the jet trigger algorithms, thereby allowing much higher event rates with reduced storage needs. The search targets low-mass dijet resonances in the range 450–1800 GeV. The analyzed data set has an integrated luminosity of up to 29.3 fb−1 and was recorded at a center-of-mass energy of 13 TeV. No excesses are found; limits are set on Gaussian-shaped contributions to the dijet mass distribution from new particles and on a model of dark-matter particles with axial-vector couplings to quarks.

关键词： Particle dark matter Quark & gluon jets Weakly interacting massive particles Hadron colliders

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Frontispiece: Quantum Crystallography: Current Developments and Future Perspectives

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Chemistry – A european Journal 2018年第43期24卷

作者： Alessandro Genoni Lukas bučinský Nicolas Claiser Julia Contreras-García birger Dittrich Paulina M. Dominiak enrique espinosa Carlo Gatti Paolo Giannozzi Jean-Michel Gillet Dylan Jayatilaka Piero Macchi Anders Ø. Madsen Lou Massa Chérif F. Matta Kenneth M. Merz Jr. Philip N. H. Nakashima Holger Ott Ulf Ryde Karlheinz schwarz Marek sierka simon Grabowsky Université de Lorraine CNRS Laboratoire LPCT 1 Boulevard Arago F-57078 Metz France Institute of Physical Chemistry and Chemical Physics Slovak University of Technology FCHPT SUT Radlinského 9 SK-812 37 Bratislava Slovakia Université de Lorraine CNRS Laboratoire CRM2 Boulevard des Aiguillettes BP 70239 F-54506 Vandoeuvre-lès-Nancy France Sorbonne Universités UPMC Université Paris 06 CNRS Laboratoire de Chimie Théorique (LCT) 4 Place Jussieu F-75252 Paris Cedex 05 France Anorganische und Strukturchemie II Heinrich-Heine-Universität Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany Biological and Chemical Research Centre Department of Chemistry University of Warsaw ul. Żwirki i Wigury 101 02-089 Warszawa Poland CNR-ISTM Istituto di Scienze e Tecnologie Molecolari via Golgi 19 Milano I-20133 Italy Istituto Lombardo Accademia di Scienze e Lettere via Brera 28 20121 Milano Italy Department of Mathematics Computer Science and Physics University of Udine Via delle Scienze 208 I-33100 Udine Italy Structure Properties and Modeling of Solids Laboratory CentraleSupelec Paris-Saclay University 3 rue Joliot-Curie 91191 Gif-sur-Yvette France School of Molecular Sciences University of Western Australia 35 Stirling Highway Perth WA 6009 Australia Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 CH-3012 Bern Switzerland Department of Pharmacy University of Copenhagen Universitetsparken 2 2100 Copenhagen Denmark Hunter College & the Ph.D. Program of the Graduate Center City University of New York New York USA Department of Chemistry and Physics Mount Saint Vincent University Halifax Nova Scotia B3M 2J6 Canada Department of Chemistry Dalhousie University Halifax Nova Scotia B3H 4J3 Canada Department of Chemistry Saint Mary's University Halifax Nova Scotia B3H 3C3 Canada Département de Chimie Université Laval Québec QC G1V 0A6 Canada Department of Chemistry and Department of Biochemistry and Molecular Biology Michigan Stat

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Probing the Quantum Interference between singly and Doubly Resonant Top-Quark Production in pp Collisions at s=13 TeV with the ATLAs Detector

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Physical Review Letters 2018年第15期121卷 152002-152002页

作者： M. Aaboud G. Aad b. Abbott O. Abdinov b. Abeloos D. K. Abhayasinghe s. H. Abidi O. s. AbouZeid N. L. Abraham H. Abramowicz H. Ab.e. Y. Abulaiti b. s. Acharya s. Adachi L. Adamczyk J. Adelman M. Adersberger A. Adiguzel T. Adye A. A. Affolder Y. Afik C. Agheorghiesei J. A. Aguilar-saavedra F. Ahmadov G. Aielli s. Akatsuka T. P. A. Åkesson e. Akilli A. V. Akimov G. L. Alberghi J. Albert P. Albicocco M. J. Alconada Verzini s. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos M. Alhroob b. Ali G. Alimonti J. Alison s. P. Alkire C. Allaire b. M. M. Allbrooke b. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani A. A. Alshehri M. I. Alstaty b. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi b. T. Amadio Y. Amaral Coutinho L. Ambroz C. Amelung D. Amidei s. P. Amor Dos santos s. Amoroso C. s. Amrouche C. Anastopoulos L. s. Ancu N. Andari T. Andeen C. F. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei C. R. Anelli s. Angelidakis I. Angelozzi A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony M. Antonelli D. J. A. Antrim F. Anulli M. Aoki L. Aperio bella G. Arabidze J. P. Araque V. Araujo Ferraz R. Araujo Pereira A. T. H. Arce R. e. Ardell F. A. Arduh J-F. Arguin s. Argyropoulos A. J. Armbruster L. J. Armitage A Armstrong O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni s. Artz s. Asai N. Asbah A. Ashkenazi e. M. Asimakopoulou L. Asquith K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay K. Augsten G. Avolio R. Avramidou M. K. Ayoub G. Azuelos A. e. baas M. J. baca H. bachacou K. bachas M. backes P. bagnaia M. bahmani H. bahrasemani A. J. bailey J. T. baines M. bajic C. bakalis O. K. baker P. J. bakker D. bakshi Gupta e. M. baldin P. balek F. balli W. K. balunas J. balz e. banas A. bandyopadhyay s. banerjee A. A. e. bannoura L. barak W. M. barbe e. L. barberio D. barberis M. barbero T. barillari M-s. barisits J. barkeloo T. barklow N. barlow R. barnea s. L. barnes b. M. barnett R. M. barnett Z. barnovska-b.e.essy A. baroncelli G. barone A. J. bar Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Université Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto Ontario Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Departamento de Física Teorica y del Cosmos Universidad de Granada Granada Spain Laboratório de Instrumentação e Física Experimental de Partículas - LIP Portugal Joint Institute for Nuclear Research Dubna Russia INFN Sezione di Roma Tor Vergata Roma Italy Dipartimento di Fisica Università di Roma Tor

This Letter presents a normalized differential cross-section measurement in a fiducial phase-space region where interference effects between top-quark pair production and associated production of a single top quark with a W boson and a b-quark are significant. events with exactly two leptons (ee, μμ, or eμ) and two b-tagged jets that satisfy a multiparticle invariant mass requirement are selected from 36.1 fb−1 of proton-proton collision data taken at s=13 TeV with the ATLAs detector at the LHC in 2015 and 2016. The results are compared with predictions from simulations using various strategies for the interference. The standard prescriptions for interference modeling are significantly different from each other but are within 2σ of the data. state-of-the-art predictions that naturally incorporate interference effects provide the best description of the data in the measured region of phase space most sensitive to these effects. These results provide an important constraint on interference models and will guide future model development and tuning.

关键词： Particle interactions Top quark Particle data analysis

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erratum to: Measurement of the W-boson mass in pp collisions at with the ATLAs detector

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The european Physical Journal C 2018年第11期78卷 1-14页

作者： Aaboud, M. Aad, G. Abbott, b. Abdallah, J. Abdinov, O. Abeloos, b. Abidi, s. H. AbouZeid, O. s. Abraham, N. L. Abramowicz, H. Ab.e., H. Ab.e., R. Abulaiti, Y. Acharya, b. s. Adachi, s. Adamczyk, L. Adams, D. L. Adelman, J. Adersberger, M. Adye, T. Affolder, A. A. Agatonovic-Jovin, T. Agheorghiesei, C. Aguilar-saavedra, J. A. Ahlen, s. P. Ahmadov, F. Aielli, G. Akatsuka, s. Akerstedt, H. Åkesson, T. P. A. Akimov, A. V. Alberghi, G. L. Albert, J. Alconada Verzini, M. J. Aleksa, M. Aleksandrov, I. N. Alexa, C. Alexander, G. Alexopoulos, T. Alhroob, M. Ali, b. Aliev, M. Alimonti, G. Alison, J. Alkire, s. P. Allbrooke, b. M. M. Allen, b. W. Allport, P. P. Aloisio, A. Alonso, A. Alonso, F. Alpigiani, C. Alshehri, A. A. Alstaty, M. Alvarez Gonzalez, b. Álvarez Piqueras, D. Alviggi, M. G. Amadio, b. T. Amaral Coutinho, Y. Amelung, C. Amidei, D. Amor Dos santos, s. P. Amorim, A. Amoroso, s. Amundsen, G. Anastopoulos, C. Ancu, L. s. Andari, N. Andeen, T. Anders, C. F. Anders, J. K. Anderson, K. J. Andreazza, A. Andrei, V. Angelidakis, s. Angelozzi, I. Angerami, A. Anghinolfi, F. Anisenkov, A. V. Anjos, N. Annovi, A. Antel, C. Antonelli, M. Antonov, A. Antrim, D. J. Anulli, F. Aoki, M. Aperio bella, L. Arabidze, G. Arai, Y. Araque, J. P. Araujo Ferraz, V. Arce, A. T. H. Ardell, R. e. Arduh, F. A. Arguin, J-F. Argyropoulos, s. Arik, M. Armbruster, A. J. Armitage, L. J. Arnaez, O. Arnold, H. Arratia, M. Arslan, O. Artamonov, A. Artoni, G. Artz, s. Asai, s. Asbah, N. Ashkenazi, A. Asquith, L. Assamagan, K. Astalos, R. Atkinson, M. Atlay, N. b. Augsten, K. Avolio, G. Axen, b. Ayoub, M. K. Azuelos, G. baas, A. e. baca, M. J. bachacou, H. bachas, K. backes, M. backhaus, M. bagiacchi, P. bagnaia, P. baines, J. T. bajic, M. baker, O. K. baldin, e. M. balek, P. balestri, T. balli, F. balunas, W. K. banas, e. banerjee, sw. bannoura, A. A. e. barak, L. barberio, e. L. barberis, D. barbero, M. barillari, T. barisits, M-s. barklow, T. barlow, N. barnes, s. L. barnett, b. M. barnett, R. M. barnovska-b.e.essy, Z. baroncelli, A. barone, G. Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman USA Department of Physics The University of Texas at Arlington Arlington USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics University of Toronto Toronto Canada Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz USA Department of Physics and Astronomy University of Sussex Brighton UK Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel Center for High Energy Physics University of Oregon Eugene USA Department of Physics Stockholm University Stockholm Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland Physics Department Brookhaven National Laboratory Upton USA Department of Physics Northern Illinois University DeKalb USA Fakultät für Physik Ludwig-Maximilians-Universität München Munich Germany Particle Physics Department Rutherford Appleton Laboratory Didcot UK Institute of Physics University of Belgrade Belgrade Serbia Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania Laboratório de Instrumentação e Física Experimental de Partículas-LIP Lisbon Portugal Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Department of Physics Boston University Boston USA Joint Institute for Nuclear Research JINR Dubn

It has b.e. found that Figure 30 shows the 68% and 99% confidence-level contours for the W boson and top quark mass measurements, instead of the 68% and 95% confidence-level contours, as stated in the legend.

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Measurement of jet fragmentation in Pb+Pb and pp collisions at sNN=5.02 TeV with the ATLAs detector

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Physical Review C 2018年第2期98卷 024908-024908页

作者： M. Aaboud G. Aad b. Abbott O. Abdinov b. Abeloos D. K. Abhayasinghe s. H. Abidi O. s. AbouZeid N. L. Abraham H. Abramowicz H. Ab.e. Y. Abulaiti b. s. Acharya s. Adachi L. Adamczyk J. Adelman M. Adersberger A. Adiguzel T. Adye A. A. Affolder Y. Afik C. Agheorghiesei J. A. Aguilar-saavedra F. Ahmadov G. Aielli s. Akatsuka T. P. A. Åkesson e. Akilli A. V. Akimov G. L. Alberghi J. Albert P. Albicocco M. J. Alconada Verzini s. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos M. Alhroob b. Ali G. Alimonti J. Alison s. P. Alkire C. Allaire b. M. M. Allbrooke b. W. Allen P. P. Allport A. Aloisio A. Alonso F. Alonso C. Alpigiani A. A. Alshehri M. I. Alstaty b. Alvarez Gonzalez D. Álvarez Piqueras M. G. Alviggi b. T. Amadio Y. Amaral Coutinho L. Ambroz C. Amelung D. Amidei s. P. Amor Dos santos s. Amoroso C. s. Amrouche C. Anastopoulos L. s. Ancu N. Andari T. Andeen C. F. Anders J. K. Anders K. J. Anderson A. Andreazza V. Andrei C. R. Anelli s. Angelidakis I. Angelozzi A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony M. Antonelli D. J. A. Antrim F. Anulli M. Aoki L. Aperio bella G. Arabidze J. P. Araque V. Araujo Ferraz R. Araujo Pereira A. T. H. Arce R. e. Ardell F. A. Arduh J-F. Arguin s. Argyropoulos A. J. Armbruster L. J. Armitage A Armstrong O. Arnaez H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni s. Artz s. Asai N. Asbah A. Ashkenazi e. M. Asimakopoulou L. Asquith K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. b. Atlay K. Augsten G. Avolio R. Avramidou M. K. Ayoub G. Azuelos A. e. baas M. J. baca H. bachacou K. bachas M. backes P. bagnaia M. bahmani H. bahrasemani A. J. bailey J. T. baines M. bajic C. bakalis O. K. baker P. J. bakker D. bakshi Gupta e. M. baldin P. balek F. balli W. K. balunas J. balz e. banas A. bandyopadhyay s. banerjee A. A. e. bannoura L. barak W. M. barbe e. L. barberio D. barberis M. barbero T. barillari M-s. barisits J. barkeloo T. barklow N. barlow R. barnea s. L. barnes b. M. barnett R. M. barnett Z. barnovska-b.e.essy A. baroncelli G. barone A. J. bar Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Université Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto Ontario Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion Israel Institute of Technology Haifa Israel High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Departamento de Física Teorica y del Cosmos Universidad de Granada Granada Spain Laboratório de Instrumentação e Física Experimental de Partículas - LIP Lisboa Portugal Joint Institute for Nuclear Research Dubna Russia INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Università di Roma Tor Verga

This paper presents a measurement of jet fragmentation functions in 0.49 nb−1 of Pb+Pb collisions and 25 pb−1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAs detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is ob.e.ved, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also ob.e.ved to be enhanced. between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is ob.e.ved in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is ob.e.ved.

关键词： Fragmentation into hadrons Quark & gluon jets Relativistic heavy-ion collisions

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