Analysis of identified particle transverse momentum spectra produced in pp, p--Pb and Pb--Pb collisions at the LHC using Tsallis--Pareto-type function

Article
Report number	arXiv:2112.13223
Title	Analysis of identified particle transverse momentum spectra produced in pp, p--Pb and Pb--Pb collisions at the LHC using Tsallis--Pareto-type function
Author(s)	Yang, Pei-Pin (Shanxi U.) ; Duan, Mai-Ying (Shanxi U.) ; Liu, Fu-Hu (Shanxi U.) ; Sahoo, Raghunath (Indian Inst. Tech., Indore ; CERN)
Publication	2022-07-26
Imprint	2021-12-25
Number of pages	30
Note	Please see the published version in the journal Symmetry following the reference and DOI
In:	Symmetry 14 (2022) 1530
DOI	10.3390/sym14081530 (publication)
Subject category	nucl-th ; Nuclear Physics - Theory ; nucl-ex ; Nuclear Physics - Experiment ; hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Accelerator/Facility, Experiment	CERN LHC ; ALICE
Abstract	In the framework of a multi-source thermal model at the partonic-level, we have analyzed transverse momentum spectra of hadrons measured by the ALICE Collaboration in proton-proton ($pp$ or $p$-$p$) collisions at the center-of-mass energy of $\sqrt{s}=7$ and 13 TeV, proton-lead ($p$-Pb) collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV, and lead-lead (Pb-Pb) collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV. For meson(baryon), the contributions of two(three) constituent quarks are considered, in which each quark contributes to hadron transverse momentum to obey the revised phenomenological Tsallis transverse momentum distribution for the Maxwell-Boltzmann particles (the TP-like function in short) with isotropic random azimuthal angle. Three main parameters, namely, the revised index $a_0$, effective temperature $T$, and entropy-related index $n$ are obtained, which show the same tendency for small and large systems with respect to the centrality (or multiplicity) of events, rest mass of hadrons, and constituent mass of quarks.
Copyright/License	publication: © 2022-2024 The authors (License: CC BY 4.0) preprint: (Licenses: CC BY 4.0, CC BY-SA 4.0)

$-0+Fig. 1. Multiplicity dependent $p_{T}$ spectra of $\pi^++\pi^-$ (a), $K^{+}+K^{-}$ (b), $p+\overline{p}$ (c), $K^{0}_{S}$ (d), $K^{*}+\overline{K}{}^*$ (e), $\Lambda+\overline{\Lambda}$ (f), $\Xi^{-}+\overline\Xi{}^{+}$ (g), and $\Omega^{-}+\overline{\Omega}{}^{+}$ (h) with $|y|<0.5$, produced in $pp$ collisions at $\sqrt{s}=7$ TeV. Different symbols represent the experimental data for different multiplicity classes measured by the ALICE Collaboration~\cite{44}, where in most cases the data are scaled by constant multipliers marked in the panels for clarity. The curves represent our fit results based on the Monte Carlo calculations.fig1.eps$ $-+Fig. 2. Same as Figure 1, but showing the multiplicity dependent $p_{T}$ spectra of $\pi^++\pi^-$ (a), $K^{+}+K^{-}$ (b), $p+\overline{p}$ (c), $K^{0}_{S}$ (d), $K^{*0}$ (e), $\Lambda+\overline{\Lambda}$ (f), $\Xi^{-}+\overline\Xi{}^{+}$ (g), and $\Omega^{-}+\overline{\Omega}{}^{+}$ (h) with $|y|<0.5$ produced in $pp$ collisions at $\sqrt{s}=13$ TeV measured by the ALICE Collaboration~\cite{45,46,47}.fig2.eps0$ $-0+Fig. 3. The centrality dependent $p_T$ spectra of $\pi^++\pi^-$ (a), $K^{+}+K^{-}$ (b), $p+\overline{p}$ (c), $K^{0}_{S}$ (d), $\Sigma(1385)^+$ (e), $\Lambda+\overline{\Lambda}$ (f), $(\Xi^{-}+\overline\Xi{}^{+})/2$ (g), and $(\Omega^{-}+\overline{\Omega}{}^{+})/2$ (h) with $-0.5<y<0$ (a--c, e, g, h) or $0<y<0.5$ (d, f) produced in $p$--Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV measured by the ALICE Collaboration~\cite{10,48,49,50}. Different symbols represent the experimental data with different centrality classes, where different constant multipliers are used to re-scale the data for clarity. The curves are our fit results based on the Monte Carlo calculations.fig3.eps$ Show more plots

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ჩანაწერი შექმნილია 2021-12-28, ბოლოს შესწორებულია 2024-09-18

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2112.13223 - სრული ტექსტის ჩამოტვირთვა

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