Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector

M Aaboud; G Aad; B Abbott; J Abdallah; O Abdinov; B Abeloos; R Aben; OS Abouzeid; NL Abraham; H Abramowicz; H Abreu; R Abreu; Y Abulaiti; BS Acharya; L Adamczyk; DL Adams; J Adelman; S Adomeit; T Adye; AA Affolder; T Agatonovic-Jovin; J Agricola; JA Aguilar-Saavedra; SP Ahlen; F Ahmadov; G Aielli; H Akerstedt; TPA Åkesson; AV Akimov; GL Alberghi; J Albert; S Albrand; MJ Alconada Verzini; M Aleksa; IN Aleksandrov; C Alexa; G Alexander; T Alexopoulos; M Alhroob; B Ali; M Aliev; G Alimonti; J Alison; SP Alkire; BMM Allbrooke; BW Allen; PP Allport; A Aloisio; A Alonso; F Alonso; C Alpigiani; M Alstaty; B Alvarez Gonzalez; D Álvarez Piqueras; MG Alviggi; BT Amadio; K Amako; Y Amaral Coutinho; C Amelung; D Amidei; SP Amor Dos Santos; A Amorim; S Amoroso; G Amundsen; C Anastopoulos; LS Ancu; N Andari; T Andeen; CF Anders; G Anders; JK Anders; KJ Anderson; A Andreazza; V Andrei; S Angelidakis; I Angelozzi; P Anger; A Angerami; F Anghinolfi; AV Anisenkov; N Anjos; A Annovi; C Antel; M Antonelli; A Antonov; F Anulli; M Aoki; L Aperio Bella; G Arabidze; Y Arai; JP Araque; ATH Arce; FA Arduh; JF Arguin; S Argyropoulos; M Arik; AJ Armbruster; LJ Armitage; O Arnaez; H Arnold

Journal article

Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector

M Aaboud, G Aad, B Abbott, J Abdallah, O Abdinov, B Abeloos, R Aben, OS Abouzeid, NL Abraham, H Abramowicz, H Abreu, R Abreu, Y Abulaiti, BS Acharya, L Adamczyk, DL Adams, J Adelman, S Adomeit, T Adye, AA Affolder Show all

Physical Review C | AMER PHYSICAL SOC | Published : 2017

DOI: 10.1103/PhysRevC.95.064914

Abstract

Two-particle pseudorapidity correlations are measured in sNN=2.76TeVPb+Pb, sNN=5.02TeVp+Pb, and s=13TeVpp collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7μb-1, 28 nb-1, and 65 nb-1, respectively. The correlation function CN(η1,η2) is measured as a function of event multiplicity using charged particles in the pseudorapidity range |η|<2.4. The correlation function contains a significant short-range component, which is estimated and subtracted. After removal of the short-range component, the shape of the correlation function is described approximately by 1+(a12)1/2η1η2 in all collision systems over the full multiplicity range. The values of (a..

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University of Melbourne Researchers

Elisabetta Barberio Author

Federico Scutti Author

G. N. Taylor Author

Phillip Urquijo Author

Grants

Awarded by National Science Foundation

Funding Acknowledgements

We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC, and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST, and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR, and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DSM/IRFU, France; GNSF, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, I-CORE, and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; and DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, the Canada Council, CANARIE, CRC, Compute Canada, FQRNT, and the Ontario Innovation Trust, Canada; EPLANET, ERC, FP7, Horizon 2020, and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex and Idex, ANR, Region Auvergne, and Fondation Partager le Savoir, France; DFG and AvH Foundation, Germany; Herakleitos, Thales, and Aristeia programs cofinanced by EU-ESF and the Greek NSRF; BSF, GIF, and Minerva, Israel; BRF, Norway; Generalitat de Catalunya, Generalitat Valenciana, Spain; and the Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK), and BNL (USA), the Tier-2 facilities worldwide, and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref. [53].