Measurement of longitudinal flow decorrelations in Pb Pb collisions at √sNN=2.76 and 5.02 TeV with the ATLAS detector

M Aaboud; G Aad; B Abbott; O Abdinov; B Abeloos; SH Abidi; OS AbouZeid; NL Abraham; H Abramowicz; H Abreu; R Abreu; Y Abulaiti; BS Acharya; S Adachi; L Adamczyk; J Adelman; M Adersberger; T Adye; AA Affolder; Y Afik; T Agatonovic-Jovin; C Agheorghiesei; JA Aguilar-Saavedra; SP Ahlen; F Ahmadov; G Aielli; S Akatsuka; H Akerstedt; TPA Åkesson; E Akilli; AV Akimov; GL Alberghi; J Albert; P Albicocco; MJ Alconada Verzini; SC Alderweireldt; 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; AA Alshehri; MI Alstaty; B Alvarez Gonzalez; D Álvarez Piqueras; MG Alviggi; BT Amadio; Y Amaral Coutinho; C Amelung; D Amidei; SP Amor Dos Santos; S Amoroso; G Amundsen; C Anastopoulos; LS Ancu; N Andari; T Andeen; CF Anders; JK Anders; KJ Anderson; A Andreazza; V Andrei; S Angelidakis; I Angelozzi; A Angerami; AV Anisenkov; N Anjos; A Annovi; C Antel; M Antonelli; A Antonov; DJ Antrim; F Anulli; M Aoki; L Aperio Bella; G Arabidze; Y Arai; JP Araque; V Araujo Ferraz; ATH Arce; RE Ardell; FA Arduh; JF Arguin; S Argyropoulos; M Arik; AJ Armbruster; LJ Armitage

Journal article

Measurement of longitudinal flow decorrelations in Pb Pb collisions at √sNN=2.76 and 5.02 TeV with the ATLAS detector

M Aaboud, G Aad, B Abbott, O Abdinov, B Abeloos, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, R Abreu, Y Abulaiti, BS Acharya, S Adachi, L Adamczyk, J Adelman, M Adersberger, T Adye, AA Affolder, Y Afik Show all

European Physical Journal C | SPRINGER | Published : 2018

DOI: 10.1140/epjc/s10052-018-5605-7

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Abstract

Measurements of longitudinal flow correlations are presented for charged particles in the pseudorapidity range | η| < 2.4 using 7 and 470 μ b - 1 of Pb+Pb collisions at sNN=2.76 and 5.02 TeV, respectively, recorded by the ATLAS detector at the LHC. It is found that the correlation between the harmonic flow coefficients vn measured in two separated η intervals does not factorise into the product of single-particle coefficients, and this breaking of factorisation, or flow decorrelation, increases linearly with the η separation between the intervals. The flow decorrelation is stronger at 2.76 TeV than at 5.02 TeV. Higher-order moments of the correlations are also measured, and the corresponding..

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University of Melbourne Researchers

Elisabetta Barberio Author

Federico Scutti Author

G. N. Taylor Author

Phillip Urquijo Author

Grants

Awarded by Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)

Funding Acknowledgements

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-DRF/IRFU, France; SRNSF, 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; 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; 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, ERDF, 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 programmes co-financed by EU-ESF and the Greek NSRF; BSF, GIF and Minerva, Israel; BRF, Norway; CERCA Programme Generalitat de Catalunya, Generalitat Valenciana, Spain; the Royal Society and Leverhulme Trust, United Kingdom.