A systematic analysis of transverse momentum spectra of J/ψ mesons in high energy collisions

被引：8

作者：

Zhang, Xu-Hong ^{[1
,2
,3
]}

Liu, Fu-Hu ^{[1
,2
,3
]}

Olimov, Khusniddin K. ^{[4
]}

机构：

[1] Shanxi Univ, Inst Theoret Phys, Taiyuan 030006, Peoples R China

[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China

[3] Shanxi Univ, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China

[4] Uzbek Acad Sci, Phys Tech Inst SPA Phys Sun, Chingiz Aytmatov St 2b, Tashkent 100084, Uzbekistan

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2021年 / 30卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Transverse momentum spectrum; J/psi meson; TP-like function; convolution; EXTENSIVE STATISTICAL-MECHANICS; QUARK-GLUON PLASMA; PLUS P COLLISIONS; TSALLIS DISTRIBUTION; MULTI-STRANGE; DEPENDENCE; MATTER; PAIR; MULTIPLICITY; PARAMETERS;

D O I：

10.1142/S0218301321500518

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We aggregate the transverse momentum spectra of J/psi mesons produced in high energy gold-gold (Au-Au), deuteron-gold (d-Au), lead-lead (Pb-Pb), proton-lead (p-Pb), and proton-(anti)proton (p-p((p) over bar)) collisions measured by several collaborations at the Relativistic Heavy Ion collider (RHIC), the Tevatron Proton-Antiproton Collider, and the Large Hadron Collider (LHC). The collision energy (the center-of-mass energy) gets involved in a large range from dozens of GeV to 13 TeV (the top LHC energy). We consider two participant or contributor partons, a charm quark and an anti-charm quark, in the production of J/psi The probability density of each quark is described by means of the modified Tsallis-Pareto-type function (the TP-like function) while considering that both quarks make suitable contributions to the J/psi transverse momentum spectrum. Therefore, the convolution of two TP-like functions is applied to represent the J/psi spectrum. We adopt the mentioned convolution function to fit the experimental data and find out the trends of the power exponent, effective temperature, and of the revised index with changing the centrality, rapidity, and collision energy. Beyond that, we capture the characteristic of J/psi spectrum, which is of great significance to better understand the production mechanism of J/psi in high energy collisions.

引用

页数：41

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