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Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at sNN=8.16TeV

Physical Review C 2021年第1期103卷 014902-014902页

作者： A. M. Sirunyan A. Tumasyan W. Adam F. Ambrogi E. Asilar T. Bergauer J. Brandstetter M. Dragicevic J. Erö A. Escalante Del Valle M. Flechl R. Frühwirth V. M. Ghete J. Hrubec M. Jeitler N. Krammer I. Krätschmer D. Liko T. Madlener I. Mikulec N. Rad H. Rohringer J. Schieck R. Schöfbeck M. Spanring D. Spitzbart A. Taurok W. Waltenberger J. Wittmann C.-E. Wulz M. Zarucki V. Chekhovsky V. Mossolov J. Suarez Gonzalez E. A. De Wolf D. Di Croce X. Janssen J. Lauwers M. Pieters H. Van Haevermaet P. Van Mechelen N. Van Remortel S. Abu Zeid F. Blekman J. D'Hondt I. De Bruyn J. De Clercq K. Deroover G. Flouris D. Lontkovskyi S. Lowette I. Marchesini S. Moortgat L. Moreels Q. Python K. Skovpen S. Tavernier W. Van Doninck P. Van Mulders I. Van Parijs D. Beghin B. Bilin H. Brun B. Clerbaux G. De Lentdecker H. Delannoy B. Dorney G. Fasanella L. Favart R. Goldouzian A. Grebenyuk A. K. Kalsi T. Lenzi J. Luetic N. Postiau E. Starling L. Thomas C. Vander Velde P. Vanlaer D. Vannerom Q. Wang T. Cornelis D. Dobur A. Fagot M. Gul I. Khvastunov D. Poyraz C. Roskas D. Trocino M. Tytgat W. Verbeke B. Vermassen M. Vit N. Zaganidis H. Bakhshiansohi O. Bondu S. Brochet G. Bruno C. Caputo P. David C. Delaere M. Delcourt A. Giammanco G. Krintiras V. Lemaitre A. Magitteri A. Mertens M. Musich K. Piotrzkowski A. Saggio M. Vidal Marono S. Wertz J. Zobec F. L. Alves G. A. Alves M. Correa Martins Junior G. Correia Silva C. Hensel A. Moraes M. E. Pol P. Rebello Teles E. Belchior Batista Das Chagas W. Carvalho J. Chinellato E. Coelho E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza H. Malbouisson D. Matos Figueiredo M. Melo De Almeida C. Mora Herrera L. Mundim H. Nogima W. L. Prado Da Silva L. J. Sanchez Rosas A. Santoro A. Sznajder M. Thiel E. J. Tonelli Manganote F. Torres Da Silva De Araujo A. Vilela Pereira S. Ahuja C. A. Bernardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov R. Hadjiiska P. Iaydjiev A. Marinov M. Misheva M. Rodo Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussels Brussels Belgium Université Libre de Bruxelles Bruxelles Belgium The University of Kansas Lawrence Kansas USA Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China University of Virginia Charlottesville Virginia USA National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Institute of High Energy Physics Beijing China CERN European Organization for Nuclear Research Geneva Switzerland Texas Tech University Lubbock Texas USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif

Event-by-event long-range correlations of azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV pPb data, collected by the CMS experiment at the CERN Large Hadron Collider, are extracted using a subevent four-particle cumulant technique applied to very low multiplicity events. Each combination of four charged particles is selected from either two, three, or four distinct subevent regions of a pseudorapidity range from −2.4 to 2.4 of the CMS tracker, and with transverse momentum between 0.3 and 3.0 GeV. Using the subevent cumulant technique, correlations between vn of different orders are measured as functions of particle multiplicity and compared to the standard cumulant method without subevents over a wide event multiplicity range. At high multiplicities, the v2 and v3 coefficients exhibit an anticorrelation; this behavior is observed consistently using various methods. The v2 and v4 correlation strength is found to depend on the number of subevents used in the calculation. As the event multiplicity decreases, the results from different subevent methods diverge because of different contributions of noncollective or few-particle correlations. Correlations extracted with the four-subevent method exhibit a tendency to diminish monotonically toward the lowest multiplicity region (about 20 charged tracks) investigated. These findings extend previous studies to a significantly lower event multiplicity range and establish the evidence for the onset of long-range collective multiparticle correlations in small system collisions.

关键词： Particle correlations & fluctuations Relativistic heavy-ion collisions Hadron colliders

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Seismic response assessment of base-isolated bridges accounting for the stress-softening behaviour of high damping natural rubber bearings

Seismic response assessment of base-isolated bridges account...

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作者： Tubaldi, E. Ahmadi, H. Muhr, A. Ragni, L. Dall'asta, A. School of Architecture and Design University of Camerino Italy Tun Abdul Razak Research Centre Brickendonbury United Kingdom Department of Civil Engineering Construction and Architecture Polytechnic University of Marche Italy

In the last few decades, high damping natural rubber (HDNR) bearings have been extensively employed for seismic isolation of bridges and buildings because of their low horizontal stiffness and high damping capacity, which allows shifting the vibration period of the isolated structure away from where the earthquake input has the highest energy content and at the same time controlling the motion of the system. In HDNR material, filler is added to the natural rubber in order to improve its properties such as stiffness and dissipative capacity. The addition of the filler induces also a stress-softening behaviour, known as "Mullins effect". This effect makes the response of HDNR bearings path-history dependent and thus may influence the seismic performance of isolated systems. Published literature has shown that the initial "virgin" properties of the material are recovered. Accordingly, current seismic codes make the assumption that "Mullins effect" is a reversible phenomenon. Thus, they suggest simplified methods based on the use of property modification factors for the bearing model properties to account for this effect in the seismic response evaluation of structures isolated with HDNR bearings. The present paper is a study of the consequences of such strain-history dependent behaviour on the seismic response of structural systems isolated with HDNR bearings. In particular, the bearing behaviour is described by a non-linear processdependent constitutive model based on one previously developed. This model allows separation of the contribution to the response due to the path-history dependent component from the contribution resulting from the stable (scragged) component. The model properties are calibrated against double-shear tests carried out on HDNR compounds commonly employed for seismic isolators. In particular, the response of a realistic isolated bridge is analyzed under ground motions with different characteristics by considering two different conditions for the

关键词： Seismic response

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The effect of natural pozzolan on sulfate resisting cement exposed to sodium sulfate attack for attaining sustainable building material

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Key engineering Materials 2015年 650卷 122-130页

作者： Chihaoui, Ramdane Khelafi, Hamid Mouli, Mohamed LABMAT Laboratory Department of Civil Engineering National Polytechnic School ENPO BP 1523 El-M'Naouer Oran31000 Algeria Faculty of Architecture and Civil Engineering University of Sciences and Technology USTO-MB BP 1505 E1-M'Naouer Oran31000 Algeria

This paper investigates the sulfate resistance of blended cements produced by replacing 10, 20, and 30% of sulfate resisting cement (SRC) with Algerian natural pozzolan. Ordinary and blended cement mortar specimens were cast and immersed in a 5% sodium sulfate solution for 3 years. The sulfate resistance of mortars was evaluated by visual examination, compressive strength, mass change and diffraction (XRD), which was used to identify the degradation products formed by sulfate attack. The test results demonstrated that the sulfate resisting cement incorporating 10% of natural pozzolan was less susceptible to sulfate attack. In addition to improved performance, the results promise the production of a sustainable building material with environmental and economic benefits due to the reduced amount of overly-high-energy-consuming cement used and the potential reduction of the cost of sulfate resisting cement. © (2015) Trans Tech Publications, Switzerland.

关键词： Compressive strength

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Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN=2.76TeV

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Physical Review C 2019年第6期99卷 064901-064901页

作者： S. Acharya F. T.-. Acosta D. Adamová J. Adolfsson M. M. Aggarwal G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. U. Ahn S. Aiola A. Akindinov M. Al-Turany S. N. Alam D. S. D. Albuquerque D. Aleksandrov B. Alessandro R. Alfaro Molina Y. Ali A. Alici A. Alkin J. Alme T. Alt L. Altenkamper I. Altsybeev C. Andrei D. Andreou H. A. Andrews A. Andronic M. Angeletti V. Anguelov C. Anson T. Antičić F. Antinori P. Antonioli R. Anwar N. Apadula L. Aphecetche H. Appelshäuser S. Arcelli R. Arnaldi O. W. Arnold I. C. Arsene M. Arslandok B. Audurier A. Augustinus R. Averbeck M. D. Azmi A. Badalà Y. W. Baek S. Bagnasco R. Bailhache R. Bala A. Baldisseri M. Ball R. C. Baral A. M. Barbano R. Barbera F. Barile L. Barioglio G. G. Barnaföldi L. S. Barnby V. Barret P. Bartalini K. Barth E. Bartsch N. Bastid S. Basu G. Batigne B. Batyunya P. C. Batzing J. L. Bazo Alba I. G. Bearden H. Beck C. Bedda N. K. Behera I. Belikov F. Bellini H. Bello Martinez R. Bellwied L. G. E. Beltran V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov D. Berenyi R. A. Bertens D. Berzano L. Betev P. P. Bhaduri A. Bhasin I. R. Bhat H. Bhatt B. Bhattacharjee J. Bhom A. Bianchi L. Bianchi N. Bianchi J. Bielčík J. Bielčíková A. Bilandzic G. Biro R. Biswas S. Biswas J. T. Blair D. Blau C. Blume G. Boca F. Bock A. Bogdanov L. Boldizsár M. Bombara G. Bonomi M. Bonora H. Borel A. Borissov M. Borri E. Botta C. Bourjau L. Bratrud P. Braun-Munzinger M. Bregant T. A. Broker M. Broz E. J. Brucken E. Bruna G. E. Bruno D. Budnikov H. Buesching S. Bufalino P. Buhler P. Buncic O. Busch Z. Buthelezi J. B. Butt J. T. Buxton J. Cabala D. Caffarri H. Caines A. Caliva E. Calvo Villar R. S. Camacho P. Camerini A. A. Capon F. Carena W. Carena F. Carnesecchi J. Castillo Castellanos A. J. Castro E. A. R. Casula C. Ceballos Sanchez S. Chandra B. Chang W. Chang S. Chapeland M. Chartier S. Chattopadhyay A. Chauvin C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato S. Cho P. Chochula T. Chowdhury P. Christakoglou C. H. Christensen P. Christiansen T. Chujo S. U. Chung C Variable Energy Cyclotron Centre Kolkata India Department of Physics University of California Berkeley California USA Nuclear Physics Institute of the Czech Academy of Sciences Řež u Prahy Czech Republic Lund University Department of Physics Division of Particle Physics Lund Sweden Physics Department Panjab University Chandigarh India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Indian Institute of Technology Bombay (IIT) Mumbai India Korea Institute of Science and Technology Information Daejeon Republic of Korea Yale University New Haven Connecticut United States Institute for Theoretical and Experimental Physics Moscow Russia Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany Universidade Estadual de Campinas (UNICAMP) Campinas Brazil National Research Centre Kurchatov Institute Moscow Russia INFN Sezione di Torino Turin Italy Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi ” Rome Italy INFN Sezione di Bologna Bologna Italy Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Department of Physics and Technology University of Bergen Bergen Norway Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany V. Fock Institute for Physics St. Petersburg State University St. Petersburg Russia Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Westfälische Wilhelms-Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut

The production of the ρ(770)0 meson has been measured at midrapidity (|y|<0.5) in pp and centrality differential Pb-Pb collisions at sNN= 2.76 TeV with the ALICE detector at the Large Hadron Collider. The particles have been reconstructed in the ρ(770)0→π+π− decay channel in the transverse-momentum (pT) range 0.5–11 GeV/c. A centrality-dependent suppression of the ratio of the integrated yields 2ρ(770)0/(π++π−) is observed. The ratio decreases by ∼40% from pp to central Pb-Pb collisions. A study of the pT-differential 2ρ(770)0/(π++π−) ratio reveals that the suppression occurs at low transverse momenta, pT<2 GeV/c. At higher momentum, particle ratios measured in heavy-ion and pp collisions are consistent. The observed suppression is very similar to that previously measured for the K*(892)0/K ratio and is consistent with EPOS3 predictions that may imply that rescattering in the hadronic phase is a dominant mechanism for the observed suppression.

关键词： Nucleon induced nuclear reactions Nucleon-nucleon interactions Particle & resonance production Relativistic heavy-ion collisions Mesons

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Direct photon production at low transverse momentum in proton-proton collisions at s=2.76 and 8 TeV

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Physical Review C 2019年第2期99卷 024912-024912页

作者： S. Acharya F. T.-. Acosta D. Adamová J. Adolfsson M. M. Aggarwal G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. U. Ahn S. Aiola A. Akindinov M. Al-Turany S. N. Alam D. S. D. Albuquerque D. Aleksandrov B. Alessandro R. Alfaro Molina Y. Ali A. Alici A. Alkin J. Alme T. Alt L. Altenkamper I. Altsybeev C. Andrei D. Andreou H. A. Andrews A. Andronic M. Angeletti V. Anguelov C. Anson T. Antičić F. Antinori P. Antonioli R. Anwar N. Apadula L. Aphecetche H. Appelshäuser S. Arcelli R. Arnaldi O. W. Arnold I. C. Arsene M. Arslandok B. Audurier A. Augustinus R. Averbeck M. D. Azmi A. Badalà Y. W. Baek S. Bagnasco R. Bailhache R. Bala A. Baldisseri M. Ball R. C. Baral A. M. Barbano R. Barbera F. Barile L. Barioglio G. G. Barnaföldi L. S. Barnby V. Barret P. Bartalini K. Barth E. Bartsch N. Bastid S. Basu G. Batigne B. Batyunya P. C. Batzing J. L. Bazo Alba I. G. Bearden H. Beck C. Bedda N. K. Behera I. Belikov F. Bellini H. Bello Martinez R. Bellwied L. G. E. Beltran V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov D. Berenyi R. A. Bertens D. Berzano L. Betev P. P. Bhaduri A. Bhasin I. R. Bhat H. Bhatt B. Bhattacharjee J. Bhom A. Bianchi L. Bianchi N. Bianchi J. Bielčík J. Bielčíková A. Bilandzic G. Biro R. Biswas S. Biswas J. T. Blair D. Blau C. Blume G. Boca F. Bock A. Bogdanov L. Boldizsár M. Bombara G. Bonomi M. Bonora H. Borel A. Borissov M. Borri E. Botta C. Bourjau L. Bratrud P. Braun-Munzinger M. Bregant T. A. Broker M. Broz E. J. Brucken E. Bruna G. E. Bruno D. Budnikov H. Buesching S. Bufalino P. Buhler P. Buncic O. Busch Z. Buthelezi J. B. Butt J. T. Buxton J. Cabala D. Caffarri H. Caines A. Caliva E. Calvo Villar R. S. Camacho P. Camerini A. A. Capon F. Carena W. Carena F. Carnesecchi J. Castillo Castellanos A. J. Castro E. A. R. Casula C. Ceballos Sanchez S. Chandra B. Chang W. Chang S. Chapeland M. Chartier S. Chattopadhyay A. Chauvin C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato S. Cho P. Chochula T. Chowdhury P. Christakoglou C. H. Christensen P. Christiansen T. Chujo S. U. Chung C Variable Energy Cyclotron Centre Kolkata India Department of Physics University of California Berkeley California United States Nuclear Physics Institute of the Czech Academy of Sciences Řež u Prahy Czech Republic Lund University Department of Physics Division of Particle Physics Lund Sweden Physics Department Panjab University Chandigarh India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Indian Institute of Technology Bombay (IIT) Mumbai India Korea Institute of Science and Technology Information Daejeon Republic of Korea Yale University New Haven Connecticut United States Institute for Theoretical and Experimental Physics Moscow Russia Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany Universidade Estadual de Campinas (UNICAMP) Campinas Brazil National Research Centre Kurchatov Institute Moscow Russia INFN Sezione di Torino Turin Italy Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi' Rome Italy INFN Sezione di Bologna Bologna Italy Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Department of Physics and Technology University of Bergen Bergen Norway Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany V. Fock Institute for Physics St. Petersburg State University St. Petersburg Russia Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Creighton Unive

Measurements of inclusive and direct photon production at midrapidity in pp collisions at s=2.76 and 8 TeV are presented by the ALICE experiment at the LHC. The results are reported in transverse momentum ranges of 0.47 GeV/c is at least one σ above unity and consistent with expectations from next-to-leading order pQCD calculations.

关键词： Nuclear reactions Nucleon induced nuclear reactions Perturbative QCD Photon, lepton & quark production Quantum chromodynamics

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Suppression of Λ(1520) resonance production in central Pb-Pb collisions at sNN=2.76 TeV

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Physical Review C 2019年第2期99卷 024905-024905页

作者： S. Acharya D. Adamová J. Adolfsson M. M. Aggarwal G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. U. Ahn S. Aiola A. Akindinov M. Al-Turany S. N. Alam D. S. D. Albuquerque D. Aleksandrov B. Alessandro R. Alfaro Molina Y. Ali A. Alici A. Alkin J. Alme T. Alt L. Altenkamper I. Altsybeev M. N. Anaam C. Andrei D. Andreou H. A. Andrews A. Andronic M. Angeletti V. Anguelov C. Anson T. Antičić F. Antinori P. Antonioli R. Anwar N. Apadula L. Aphecetche H. Appelshäuser S. Arcelli R. Arnaldi O. W. Arnold I. C. Arsene M. Arslandok B. Audurier A. Augustinus R. Averbeck M. D. Azmi A. Badalà Y. W. Baek S. Bagnasco R. Bailhache R. Bala A. Baldisseri M. Ball R. C. Baral A. M. Barbano R. Barbera F. Barile L. Barioglio G. G. Barnaföldi L. S. Barnby V. Barret P. Bartalini K. Barth E. Bartsch N. Bastid S. Basu G. Batigne B. Batyunya P. C. Batzing J. L. Bazo Alba I. G. Bearden H. Beck C. Bedda N. K. Behera I. Belikov F. Bellini H. Bello Martinez R. Bellwied L. G. E. Beltran V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov D. Berenyi R. A. Bertens D. Berzano L. Betev P. P. Bhaduri A. Bhasin I. R. Bhat H. Bhatt B. Bhattacharjee J. Bhom A. Bianchi L. Bianchi N. Bianchi J. Bielčík J. Bielčíková A. Bilandzic G. Biro R. Biswas S. Biswas J. T. Blair D. Blau C. Blume G. Boca F. Bock A. Bogdanov L. Boldizsár M. Bombara G. Bonomi M. Bonora H. Borel A. Borissov M. Borri E. Botta C. Bourjau L. Bratrud P. Braun-Munzinger M. Bregant T. A. Broker M. Broz E. J. Brucken E. Bruna G. E. Bruno D. Budnikov H. Buesching S. Bufalino P. Buhler P. Buncic O. Busch Z. Buthelezi J. B. Butt J. T. Buxton J. Cabala D. Caffarri H. Caines A. Caliva E. Calvo Villar R. S. Camacho P. Camerini A. A. Capon F. Carena W. Carena F. Carnesecchi J. Castillo Castellanos A. J. Castro E. A. R. Casula C. Ceballos Sanchez S. Chandra B. Chang W. Chang S. Chapeland M. Chartier S. Chattopadhyay A. Chauvin C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato S. Cho P. Chochula T. Chowdhury P. Christakoglou C. H. Christensen P. Christiansen T. Chujo S. U. Chung C. C Variable Energy Cyclotron Centre Kolkata India Nuclear Physics Institute of the Czech Academy of Sciences Řež u Prahy Czech Republic Lund University Department of Physics Division of Particle Physics Lund Sweden Physics Department Panjab University Chandigarh India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Indian Institute of Technology Bombay (IIT) Mumbai India Korea Institute of Science and Technology Information Daejeon Republic of Korea Yale University New Haven Connecticut USA Institute for Theoretical and Experimental Physics Moscow Russia Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany Universidade Estadual de Campinas (UNICAMP) Campinas Brazil National Research Centre Kurchatov Institute Moscow Russia INFN Sezione di Torino Turin Italy Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi ” Rome Italy INFN Sezione di Bologna Bologna Italy Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Department of Physics and Technology University of Bergen Bergen Norway Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany V. Fock Institute for Physics St. Petersburg State University St. Petersburg Russia Central China Normal University Wuhan China Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Westfälische Wilhelms-Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg

The production yield of the Λ(1520) baryon resonance is measured at midrapidity in Pb-Pb collisions at sNN = 2.76 TeV with the ALICE detector at the Large Hadron Collider (LHC). The measurement is performed in the Λ(1520)→pK− (and charge conjugate) hadronic decay channel as a function of the transverse momentum (pT) and collision centrality. The ratio of the pT-integrated production of Λ(1520) baryons relative to Λ baryons in central collisions is suppressed by about a factor of 2 with respect to peripheral collisions. This is the first observation of the suppression of a baryonic resonance at the LHC and the first 3σ evidence of Λ(1520) suppression within a single collision system. The measured Λ(1520)/Λ ratio in central collisions is smaller than the value predicted by the statistical hadronization model calculations. The shape of the measured pT distribution and the centrality dependence of the suppression are reproduced by the EPOS3 Monte Carlo event generator. The measurement adds further support to the formation of a dense hadronic phase in the final stages of the evolution of the fireball created in heavy-ion collisions, lasting long enough to cause a significant reduction in the observable yield of short-lived resonances.

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

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Publisher Correction: Unveiling the strong interaction among hadrons at the LHC

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Nature 2021年第7844期590卷 E13页

作者： S. Acharya Z. Ahammed S. N. Alam S. Chandra S. Chattopadhyay A. K. Dubey P. Ghosh S. Muhuri P. Pareek S. Sadhu S. K. Saha J. Saini N. Sarkar V. K. Singh V. Singhal S. Thakur D. Adamová J. Bielčíková A. Isakov F. Krizek S. Kushpil M. Šumbera A. Adler A. Gomez Ramirez T. Janson U. Kebschull J. Adolfsson P. Christiansen O. Matonoha A. F. Nassirpour A. Ohlson A. Oskarsson T. Richert O. V. Rueda D. Silvermyr E. Stenlund M. M. Aggarwal S. Dudi L. Kumar S. Parmar A. Sharma N. Sharma G. Aglieri Rinella A. Alkin D. Andreou M. Angeletti A. Augustinus K. Barth F. Bellini L. Betev P. Buncic S. Chapeland V. Chibante Barroso P. Chochula F. Costa A. Di Mauro R. Divià G. Eulisse A. Festanti U. Fuchs C. Gargiulo C. Grigoras J. F. Grosse-Oetringhaus J. A. Hasenbichler H. Hillemanns P. Hristov J. P. Iddon G. M. Innocenti N. Jacazio A. Kalweit M. Keil J. Klein A. Kluge M. L. Knichel P. J. Konopka V. Kučera M. Lamanna K. Lapidus E. Laudi M. Lettrich M. Mager P. Martinengo N. Mohammadi A. Morsch T. Mrnjavac L. Musa O. Pinazza M. Puccio F. Reidt P. Riedler W. Riegler D. Rohr R. Shahoyan G. Simonetti M. Suljic A. Tauro A. Telesca P. Vande Vyvre B. Volkel B. von Haller A. Wegrzynek S. C. Wenzel C. Zampolli N. Zardoshti M. Agnello A. Balbino S. Bufalino F. Catalano P. Fecchio F. Grosa N. Agrawal A. Alici L. Cifarelli D. De Gruttola D. Hatzifotiadou R. Nania F. Noferini S. Pisano J. Wilkinson A. Zichichi P. Antonioli F. Cindolo G. Clai A. Margotti R. Preghenella E. Scapparone S. Ahmad B. Ali M. D. Azmi S. Khan A. Khatun M. Mohisin Khan S. U. Ahn Z. Akbar S. Sumowidagdo A. Akindinov S. Kiselev D. Mal’Kevich K. Mikhaylov S. Shirinkin R. Sultanov K. Voloshin M. Al-Turany R. Averbeck X. Bai P. Braun-Munzinger A. Caliva M. R. Ciupek A. Dubla P. Foka U. Frankenfeld C. Garabatos P. Gasik P. Giubellino V. Gonzalez R. Grosso M. K. Habib A. Harlenderova S. Hornung M. Ivanov T. Kollegger L. Kreis C. Lippmann P. Malzacher A. Marín S. Masciocchi D. Miśkowiec C. Schmidt K. Schwarz K. Schweda I. Selyuzhenkov J. Zhu Y. G. Ma Q. Shou S. Zhang D. S. D. Albu Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Fudan University Shanghai China Institute of Nuclear Physics Homi Bhabha National Institute Kolkata India Indian Institute of Technology Indore Indore India Nuclear Physics Institute of the Czech Academy of Sciences Řež Czech Republic Institut für Informatik Fachbereich Informatik und Mathematik Johann-Wolfgang-Goethe Universität Frankfurt Frankfurt am Main Germany Division of Particle Physics Department of Physics Lund University Lund Sweden Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Niels Bohr Institute University of Copenhagen Copenhagen Denmark Physics Department Panjab University Chandigarh India Physics Department University of Jammu Jammu India European Organization for Nuclear Research (CERN) Geneva Switzerland Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine University of Liverpool Liverpool UK INFN Sezione di Bologna Bologna Italy INFN Sezione di Torino Turin Italy Inha University Incheon Republic of Korea Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Centro Fermi – Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi” Rome Italy Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Bologna Italy INFN Laboratori Nazionali di Frascati Frascati Italy Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Indonesian Institute of Sciences Jakarta Indonesia NRC «Kurchatov» Institute – ITEP Moscow Russia Joint Institute for Nuclear Research (JINR) Dubna Russia Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung Darmstadt Germany Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Physik Department Technische Universität München Munich Germany Wayne State University Detroit MI

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Bridging to the bicentenary: Collaboratively educating engineers and architects

Bridging to the bicentenary: Collaboratively educating engin...

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IABSE Conference, Geneva 2015: Structural engineering: Providing Solutions to Global Challenges

作者： Mistur, Mark Letchford, Chris Stein, Michael School of Architecture Rensselaer Polytechnic Institute TroyNY United States Department of Civil and Environmental Engineering Rensselaer Polytechnic Institute TroyNY United States Schlaich Bergermann and Partner PE New YorkNY United States

ISBN: (纸本)9783857481406

Rensselaer polytechnic Institute (RPI) has been educating civil engineers for almost 200 years and over the last fifteen a unique collaborative program has developed between the department of Civil & Environmental engineering, the School of architecture and prominent structural engineers. Funded by the Bedford Endowment, the program pairs architecture and structural engineering students over their senior semesters in a range of courses designed to improve mutual understanding, develop awareness of design motivations and aesthetics in the engineers and structural forces and forms in the architects. Led by a leading structural engineer from practice on a three year appointment, the Bedford Professor teaches both a seminar and a studio class and leads a ten day travelling workshop at the end of each academic year that exposes engineering and architecture students to best practice examples of collaboration in the design of the built environment.

关键词： Studios

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Two-particle differential transverse momentum and number density correlations in p−Pb collisions at 5.02 TeV and Pb-Pb collisions at 2.76 TeV at the CERN Large Hadron Collider

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Physical Review C 2019年第4期100卷 044903-044903页

作者： S. Acharya D. Adamová J. Adolfsson M. M. Aggarwal G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. U. Ahn S. Aiola A. Akindinov M. Al-Turany S. N. Alam D. S. D. Albuquerque D. Aleksandrov B. Alessandro R. Alfaro Molina Y. Ali A. Alici A. Alkin J. Alme T. Alt L. Altenkamper I. Altsybeev M. N. Anaam C. Andrei D. Andreou H. A. Andrews A. Andronic M. Angeletti V. Anguelov C. Anson T. Antičić F. Antinori P. Antonioli R. Anwar N. Apadula L. Aphecetche H. Appelshäuser S. Arcelli R. Arnaldi O. W. Arnold I. C. Arsene M. Arslandok B. Audurier A. Augustinus R. Averbeck M. D. Azmi A. Badalà Y. W. Baek S. Bagnasco R. Bailhache R. Bala A. Baldisseri M. Ball R. C. Baral A. M. Barbano R. Barbera F. Barile L. Barioglio G. G. Barnaföldi L. S. Barnby V. Barret P. Bartalini K. Barth E. Bartsch N. Bastid S. Basu G. Batigne B. Batyunya P. C. Batzing J. L. Bazo Alba I. G. Bearden H. Beck C. Bedda N. K. Behera I. Belikov F. Bellini H. Bello Martinez R. Bellwied L. G. E. Beltran V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov D. Berenyi R. A. Bertens D. Berzano L. Betev P. P. Bhaduri A. Bhasin I. R. Bhat H. Bhatt B. Bhattacharjee J. Bhom A. Bianchi L. Bianchi N. Bianchi J. Bielčík J. Bielčíková A. Bilandzic G. Biro R. Biswas S. Biswas J. T. Blair D. Blau C. Blume G. Boca F. Bock A. Bogdanov L. Boldizsár M. Bombara G. Bonomi M. Bonora H. Borel A. Borissov M. Borri E. Botta C. Bourjau L. Bratrud P. Braun-Munzinger M. Bregant T. A. Broker M. Broz E. J. Brucken E. Bruna G. E. Bruno D. Budnikov H. Buesching S. Bufalino P. Buhler P. Buncic O. Busch Z. Buthelezi J. B. Butt J. T. Buxton J. Cabala D. Caffarri H. Caines A. Caliva E. Calvo Villar R. S. Camacho P. Camerini A. A. Capon F. Carena W. Carena F. Carnesecchi J. Castillo Castellanos A. J. Castro E. A. R. Casula C. Ceballos Sanchez S. Chandra B. Chang W. Chang S. Chapeland M. Chartier S. Chattopadhyay A. Chauvin C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato S. Cho P. Chochula T. Chowdhury P. Christakoglou C. H. Christensen P. Christiansen T. Chujo S. U. Chung C. C Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Nuclear Physics Institute of the Czech Academy of Sciences Řež u Prahy Czech Republic Lund University Department of Physics Division of Particle Physics Lund Sweden Physics Department Panjab University Chandigarh India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Indian Institute of Technology Bombay (IIT) Mumbai India Korea Institute of Science and Technology Information Daejeon Republic of Korea Yale University New Haven Connecticut USA Institute for Theoretical and Experimental Physics Moscow Russia Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany Universidade Estadual de Campinas (UNICAMP) Campinas Brazil National Research Centre Kurchatov Institute Moscow Russia INFN Sezione di Torino Turin Italy Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi ” Rome Italy INFN Sezione di Bologna Bologna Italy Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Department of Physics and Technology University of Bergen Bergen Norway Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany St. Petersburg State University St. Petersburg Russia Central China Normal University Wuhan China Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Westfälische Wilhelms-Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg

We present measurements of two-particle differential number correlation functions R2 and transverse momentum correlation functions P2, obtained from p-Pb collisions at 5.02 TeV and Pb-Pb collisions at 2.76 TeV. The results are obtained by using charged particles in the pseudorapidity range |η|<1.0 and transverse momentum range 0.2

关键词： Nucleon induced nuclear reactions Nucleon-nucleon interactions Particle correlations & fluctuations Relativistic heavy-ion collisions Relativistic multiple-particle dynamics

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p−p, p−Λ, and Λ−Λ correlations studied via femtoscopy in pp reactions at s=7TeV

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Physical Review C 2019年第2期99卷 024001-024001页

作者： S. Acharya D. Adamová J. Adolfsson M. M. Aggarwal G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. U. Ahn S. Aiola A. Akindinov M. Al-Turany S. N. Alam D. S. D. Albuquerque D. Aleksandrov B. Alessandro R. Alfaro Molina Y. Ali A. Alici A. Alkin J. Alme T. Alt L. Altenkamper I. Altsybeev M. N. Anaam C. Andrei D. Andreou H. A. Andrews A. Andronic M. Angeletti V. Anguelov C. Anson T. Antičić F. Antinori P. Antonioli R. Anwar N. Apadula L. Aphecetche H. Appelshäuser S. Arcelli R. Arnaldi O. W. Arnold I. C. Arsene M. Arslandok A. Augustinus R. Averbeck M. D. Azmi A. Badalà Y. W. Baek S. Bagnasco R. Bailhache R. Bala A. Baldisseri M. Ball R. C. Baral A. M. Barbano R. Barbera F. Barile L. Barioglio G. G. Barnaföldi L. S. Barnby V. Barret P. Bartalini K. Barth E. Bartsch N. Bastid S. Basu G. Batigne B. Batyunya P. C. Batzing J. L. Bazo Alba I. G. Bearden H. Beck C. Bedda N. K. Behera I. Belikov F. Bellini H. Bello Martinez R. Bellwied L. G. E. Beltran V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov D. Berenyi R. A. Bertens D. Berzano L. Betev P. P. Bhaduri A. Bhasin I. R. Bhat H. Bhatt B. Bhattacharjee J. Bhom A. Bianchi L. Bianchi N. Bianchi J. Bielčík J. Bielčíková A. Bilandzic G. Biro R. Biswas S. Biswas J. T. Blair D. Blau C. Blume G. Boca F. Bock A. Bogdanov L. Boldizsár M. Bombara G. Bonomi M. Bonora H. Borel A. Borissov M. Borri E. Botta C. Bourjau L. Bratrud P. Braun-Munzinger M. Bregant T. A. Broker M. Broz E. J. Brucken E. Bruna G. E. Bruno D. Budnikov H. Buesching S. Bufalino P. Buhler P. Buncic O. Busch Z. Buthelezi J. B. Butt J. T. Buxton J. Cabala D. Caffarri H. Caines A. Caliva E. Calvo Villar R. S. Camacho P. Camerini A. A. Capon F. Carena W. Carena F. Carnesecchi J. Castillo Castellanos A. J. Castro E. A. R. Casula C. Ceballos Sanchez S. Chandra B. Chang W. Chang S. Chapeland M. Chartier S. Chattopadhyay A. Chauvin C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato S. Cho P. Chochula T. Chowdhury P. Christakoglou C. H. Christensen P. Christiansen T. Chujo S. U. Chung C. Cicalo L. Cif Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Nuclear Physics Institute of the Czech Academy of Sciences Řež u Prahy Czech Republic Lund University Department of Physics Division of Particle Physics Lund Sweden Physics Department Panjab University Chandigarh India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Indian Institute of Technology Bombay (IIT) Mumbai India Korea Institute of Science and Technology Information Daejeon Republic of Korea Yale University New Haven Connecticut United States Institute for Theoretical and Experimental Physics Moscow Russia Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany Universidade Estadual de Campinas (UNICAMP) Campinas Brazil National Research Centre Kurchatov Institute Moscow Russia INFN Sezione di Torino Turin Italy Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi” Rome Italy Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy INFN Sezione di Bologna Bologna Italy Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Department of Physics and Technology University of Bergen Bergen Norway Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany St. Petersburg State University St. Petersburg Russia Central China Normal University Wuhan China Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Westfälische Wilhelms-Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität

We report on the first femtoscopic measurement of baryon pairs, such as p−p, p−Λ, and Λ−Λ, measured by ALICE at the Large Hadron Collider (LHC) in proton-proton collisions at s=7TeV. This study demonstrates the feasibility of such measurements in pp collisions at ultrarelativistic energies. The femtoscopy method is employed to constrain the hyperon-nucleon and hyperon-hyperon interactions, which are still rather poorly understood. A new method to evaluate the influence of residual correlations induced by the decays of resonances and experimental impurities is hereby presented. The p−p, p−Λ, and Λ−Λ correlation functions were fitted simultaneously with the help of a new tool developed specifically for the femtoscopy analysis in small colliding systems: Correlation Analysis Tool using the Schrödinger equation (CATS). Within the assumption that in pp collisions the three particle pairs originate from a common source, its radius is found to be equal to r0=1.125±0.018(stat)−0.035+0.058(syst) fm. The sensitivity of the measured p−Λ correlation is tested against different scattering parameters, which are defined by the interaction among the two particles, but the statistics is not sufficient yet to discriminate among different models. The measurement of the Λ−Λ correlation function constrains the phase space spanned by the effective range and scattering length of the strong interaction. Discrepancies between the measured scattering parameters and the resulting correlation functions at LHC and RHIC energies are discussed in the context of various models.

关键词： Nucleon induced nuclear reactions Particle correlations & fluctuations Particle interactions

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