Event Patterns Extracted from Transverse Momentum and Rapidity Spectra of Z Bosons and Quarkonium States Produced in pp and Pb-Pb Collisions at LHC

Liu, Fu-Hu  (Institute of Theoretical Physics, Shanxi University, Taiyuan, Shanxi 030006, China) ; Chen, Ya-Hui  (Institute of Theoretical Physics, Shanxi University, Taiyuan, Shanxi 030006, China) ; Lacey, Roy A. (Departments of Chemistry & Physics, Stony Brook University, Stony Brook, NY 11794, USA)

31 October 2016

Abstract: Transverse momentum ( pT ) and rapidity ( y ) spectra of Z bosons and quarkonium states (some charmonium cc¯ mesons such as J/ψ and ψ(2S) and some bottomonium bb¯ mesons such as Υ(1S) , Υ(2S) , and Υ(3S) ) produced in proton-proton (pp) and lead-lead (Pb-Pb) collisions at the large hadron collider (LHC) are uniformly described by a hybrid model of two-component Erlang distribution for pT spectrum and two-component Gaussian distribution for y spectrum. The former distribution results from a multisource thermal model, and the latter one results from the revised Landau hydrodynamic model. The modelling results are in agreement with the experimental data measured in pp collisions at center-of-mass energies s=2.76 and 7 TeV and in Pb-Pb collisions at center-of-mass energy per nucleon pair sNN=2.76  TeV. Based on the parameter values extracted from pT and y spectra, the event patterns (particle scatter plots) in two-dimensional pT - y space and in three-dimensional velocity space are obtained.

Published in: Advances in High Energy Physics 2016 (2016) 9876253
Published by: Hindawi Publishing Corporation
DOI: 10.1155/2016/9876253
arXiv: 1601.07072
License: CC-BY-3.0

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