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Home > Advances in High Energy Physics (Hindawi) > Event Patterns Extracted from Transverse Momentum and Rapidity Spectra of <math id="M1" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>Z</mi></mrow></math> 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 ( ${p}_{T}$ ) and rapidity ( $y$ ) spectra of $Z$ bosons and quarkonium states (some charmonium $c\overline{c}$ mesons such as $J/\psi $ and $\psi (\mathrm{2}S)$ and some bottomonium $b\overline{b}$ mesons such as $\mathrm{{\rm Y}}(\mathrm{1}S)$ , $\mathrm{{\rm Y}}(\mathrm{2}S)$ , and $\mathrm{{\rm Y}}(\mathrm{3}S)$ ) 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 ${p}_{T}$ 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 $\sqrt{s}=\mathrm{2.76}$ and 7 TeV and in Pb-Pb collisions at center-of-mass energy per nucleon pair $\sqrt{{s}_{\mathrm{N}\mathrm{N}}}=\mathrm{2.76}$ TeV. Based on the parameter values extracted from ${p}_{T}$ and $y$ spectra, the event patterns (particle scatter plots) in two-dimensional ${p}_{T}$ - $y$ 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