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Pseudorapidity distributions of charged hadrons in xenon-xenon collisions at sNN=5.44 TeV

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2019
1-s2.0-S0370269319307713-main.pdf (1.479Mb)
Authors
Sirunyan, A M
Tumasyan, A
Adam, W
Ambrogi, F
Adžić, Petar
Ćirković, Predrag
Devetak, Damir
Đorđević, Miloš
Milošević, Jovan
Contributors
CMS Collaboration
CMS Collaboration (ukupan broj autora: 2293)
Article (Published version)
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© 2019, The Author(s)
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Abstract
Measurements of the pseudorapidity distributions of charged hadrons produced in xenon-xenon collisions at a nucleon-nucleon centre-of-mass energy of sNN=5.44 TeV are presented. The measurements are based on data collected by the CMS experiment at the LHC. The yield of primary charged hadrons produced in xenon-xenon collisions in the pseudorapidity range |η|<3.2 is determined using the silicon pixel detector in the CMS tracking system. For the 5% most central collisions, the charged-hadron pseudorapidity density in the midrapidity region |η|<0.5 is found to be 1187±36 (syst), with a negligible statistical uncertainty. The rapidity distribution of charged hadrons is also presented in the range |y|<3.2 and is found to be independent of rapidity around y=0. Existing Monte-Carlo event generators are unable to simultaneously describe both results. Comparisons of charged-hadron multiplicities between xenon-xenon and lead-lead collisions at similar collision energies show that particl...e production at midrapidity is strongly dependent on the collision geometry in addition to the system size and collision energy. © 2019 The Author(s)

Source:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2019, 799

DOI: 10.1016/j.physletb.2019.135049

ISSN: 0370-2693

WoS: 000500331400022

Scopus: 2-s2.0-85074402046
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http://vinar.vin.bg.ac.rs/handle/123456789/8633
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