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Longitudinal asymmetry and its effect on pseudorapidity distributions in Pb-Pb collisions at root s(NN)=2.76 TeV
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SYSNO ASEP 0491109 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Longitudinal asymmetry and its effect on pseudorapidity distributions in Pb-Pb collisions at root s(NN)=2.76 TeV Author(s) Acharya, S. (IN)
Adam, J. (US)
Adamová, Dagmar (UJF-V) RID, ORCID, SAI
Bielčík, J. (CZ)
Bielčíková, Jana (UJF-V) RID, ORCID, SAI
Broz, M. (CZ)
Contreras, J. G. (CZ)
Hladký, Jan (FZU-D) RID, ORCID, SAI
Horák, D. (CZ)
Křížek, Filip (UJF-V) RID, ORCID, SAI
Kučera, Vít (UJF-V) RID
Kushpil, Svetlana (UJF-V) RID, ORCID, SAI
Lavička, R. (CZ)
Mareš, Jiří A. (FZU-D) RID, ORCID
Petráček, V. (CZ)
Šumbera, Michal (UJF-V) RID, ORCID, SAI
Vaňát, Tomáš (UJF-V) ORCID, SAI
Závada, Petr (FZU-D) RID, ORCIDNumber of authors 1012 Source Title Physics Letters. B. - : Elsevier - ISSN 0370-2693
Roč. 781, č. 6 (2018), s. 20-32Number of pages 13 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords ALICE collaboration ; heavy ion collisions ; density Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nuclear physics Subject RIV - cooperation Institute of Physics - Elementary Particles and High Energy Physics R&D Projects LG15052 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LTT17018 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 ; UJF-V - RVO:61389005 UT WOS 000435653100003 EID SCOPUS 85045043683 DOI 10.1016/j.physletb.2018.03.051 Annotation First results on the longitudinal asymmetry and its effect on the pseudorapidity distributions in Pb-Pb collisions at root s(NN) = 2.76 TeV at the Large Hadron Collider are obtained with the ALICE detector. The longitudinal asymmetry arises because of an unequal number of participating nucleons from the two colliding nuclei, and is estimated for each event by measuring the energy in the forward neutron-Zero-Degree-Calorimeters (ZNs). The effect of the longitudinal asymmetry is measured on the pseudorapidity distributions of charged particles in the regions vertical bar eta vertical bar < 0.9, 2.8 < eta < 5.1 and -3.7 < eta < -1.7 by taking the ratio of the pseudorapidity distributions from events corresponding to different regions of asymmetry. The coefficients of a polynomial fit to the ratio characterise the effect of the asymmetry. A Monte Carlo simulation using a Glauber model for the colliding nuclei is tuned to reproduce the spectrum in the ZNs and provides a relation between the measurable longitudinal asymmetry and the shift in the rapidity (y(0)) of the participant zone formed by the unequal number of participating nucleons. The dependence of the coefficient of the linear term in the polynomial expansion, c(1), on the mean value of y(0) is investigated. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2019
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