Extraction of inclusive photon production at mid-rapidity in p + p and Au + Au collisions at $$\sqrt{s_{\rm{NN}}}$$ = 200 GeV

Zhang, Shenghui; Ma, R.; Zhang, Yifei; Chen, Xiaolong; Li, Xiujun; Si, F.; Li, Cheng; Shao, M.; Sun, Y. J.; Tang, Z.; Zha, W.

doi:10.1007/s41365-020-00840-4

Cited by 7 publications

(1 citation statement)

References 45 publications

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“…Heavy flavor quarks have a high probability of experiencing a relatively complete evolution process of QCD materials, so heavy flavor quarks are ideal probes to study QGP properties in heavyion collisions. In particular, it is crucial to study the interaction between heavy flavor quarks and medium by measuring the nuclear modification factor, flow and production yield of charmed meson [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Non-extensive statistical distributions of charmed meson production in Pb-Pb and pp($\overline{\text{p}}$) collisions

Su,

Chen,

Sun

et al. 2021

Preprint

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The mid-rapidity transverse-momentum spectra of charmed meson in Pb-Pb and pp(p) collisions are analyzed by Tsallis-Pareto distribution derived from non-extensive statistics. We perform a uniform description for both small and large systems over a wide range of collision energy and hadron transverse momentum. By establishing the relation between the event multiplicity and the Tsallis parameters, we observe that there is a significant linearity between thermal temperature and Tsallis-q parameter in Pb-Pb collisions at √ sNN = 2.76 TeV and 5.02 TeV. And the slope of T -(q − 1) parameter is positively correlated with the hadron mass. In addition, the charmed mesons have higher thermal temperature than the light hadrons at the same q − 1, indicating that charmed flavor requires a higher temperature to achieve the same degree of non-extensive as light flavors in the heavy-ion collision. A same fit is performed to the transverse momentum spectra of charmed meson in pp(p) collision over a large energy range with Tsallis-Pareto distribution. It is found that the thermal temperature increases with system energy while the q parameter shows a saturated trend and stops at pp(p) limit, q − 1 = 0.142 ± 0.010. Meanwhile, the results of most peripheral Pb-Pb collisions are found to approach the pp(p) limit, which suggests that less medium effect and more in similarity with pp(p) collisions are found in more peripheral heavy-ion collisions.

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Section: Introductionmentioning

confidence: 99%

Non-extensive statistical distributions of charmed meson production in Pb-Pb and pp($\overline{\text{p}}$) collisions

Su,

Chen,

Sun

et al. 2021

Preprint

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An Energy Independent Scaling of Transverse Momentum Spectra of Direct (Prompt) Photons from Two‐Body Processes in High‐Energy Proton–Proton Collisions

et al. 2022

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Transverse momentum spectra of direct (prompt) photons from two-body processes in high-energy proton-proton (p+p) collisions are analyzed in this paper. The experimental invariant cross-sections are collected at mid-rapidity in p+p collisions measured by the UA6, CCOR, R806, R110, PHENIX, NA24, CMS, ALICE, and ATLAS Collaborations over a center-of-mass energy range from 24.3 GeV to 13 TeV. In fitting the data, different kinds of functions are used which include the revised Tsallis-Pareto-type function (the TP-like function) at the particle level, the convolution of two TP-like functions at the quark level, and the root-sum-of-squares of two revised Tsallis-like functions in which the quark chemical potentials 𝝁 i = 𝝁 B ∕3 or 𝝁 i = 0, where 𝝁 B is the baryon chemical potential. The values of three main free parameters have been extracted: the effective temperature T, power index n 0 (or entropy index q), and correction index a 0 . After analyzing the changing trends of the parameters, it is found that T, q, and a 0 increase and n 0 decreases with the increase of collision energy. Based on the analyses of transverse momentum spectra, an energy independent scaling, that is, the x T scaling, is obtained.

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Measurement of electrons from open heavy-flavor hadron decays in Au+Au collisions at $$ \sqrt{s_{\textrm{NN}}} $$ = 200 GeV with the STAR detector

Collaboration¹,

Abdulhamid

Aboona

et al. 2023

J. High Energ. Phys.

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We report a new measurement of the production of electrons from open heavy-flavor hadron decays (HFEs) at mid-rapidity (|y| < 0.7) in Au+Au collisions at $$ \sqrt{s_{\textrm{NN}}} $$ s NN = 200 GeV. Invariant yields of HFEs are measured for the transverse momentum range of 3.5 < pT< 9 GeV/c in various configurations of the collision geometry. The HFE yields in head-on Au+Au collisions are suppressed by approximately a factor of 2 compared to that in p + p collisions scaled by the average number of binary collisions, indicating strong interactions between heavy quarks and the hot and dense medium created in heavy-ion collisions. Comparison of these results with models provides additional tests of theoretical calculations of heavy quark energy loss in the quark-gluon plasma.

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Extraction of inclusive photon production at mid-rapidity in p + p and Au + Au collisions at $$\sqrt{s_{\rm{NN}}}$$ = 200 GeV

Cited by 7 publications

References 45 publications

Non-extensive statistical distributions of charmed meson production in Pb-Pb and pp($\overline{\text{p}}$) collisions

Non-extensive statistical distributions of charmed meson production in Pb-Pb and pp($\overline{\text{p}}$) collisions

An Energy Independent Scaling of Transverse Momentum Spectra of Direct (Prompt) Photons from Two‐Body Processes in High‐Energy Proton–Proton Collisions

Measurement of electrons from open heavy-flavor hadron decays in Au+Au collisions at $$ \sqrt{s_{\textrm{NN}}} $$ = 200 GeV with the STAR detector

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