Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC

Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC

The transverse momentum spectra of π-, π+, K-, K+, p¯, and p produced in Au+Au collisions at center-of-mass energy sNN=7.7, 11.5, 19.6, 27, 39, 62.4, 130, and 200 GeV are analyzed in the framework of a multisource thermal model. The experimental data measured at midrapidity by the STAR Collaboration...

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Main Authors: Ya-Qin Gao, Hai-Ling Lao, Fu-Hu Liu
Format: Article
Language:English
Published: Hindawi Limited 2018-01-01
Series:Advances in High Energy Physics
Online Access:http://dx.doi.org/10.1155/2018/6047960
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spelling doaj-cd6bf5b28f9c4d9781c16a1167354d5e2020-11-25T00:47:13ZengHindawi LimitedAdvances in High Energy Physics1687-73571687-73652018-01-01201810.1155/2018/60479606047960Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHICYa-Qin Gao0Hai-Ling Lao1Fu-Hu Liu2Department of Physics, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, ChinaInstitute of Theoretical Physics & State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan, Shanxi 030006, ChinaInstitute of Theoretical Physics & State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan, Shanxi 030006, ChinaThe transverse momentum spectra of π-, π+, K-, K+, p¯, and p produced in Au+Au collisions at center-of-mass energy sNN=7.7, 11.5, 19.6, 27, 39, 62.4, 130, and 200 GeV are analyzed in the framework of a multisource thermal model. The experimental data measured at midrapidity by the STAR Collaboration are fitted by the (two-component) standard distribution. The effective temperature of emission source increases obviously with the increase of the particle mass and the collision energy. At different collision energies, the chemical potentials of up, down, and strange quarks are obtained from the antiparticle to particle yield ratios in given transverse momentum ranges available in experiments. With the increase of logarithmic collision energy, the chemical potentials of light flavor quarks decrease exponentially.http://dx.doi.org/10.1155/2018/6047960
collection DOAJ
language English
format Article
sources DOAJ
author Ya-Qin Gao
Hai-Ling Lao
Fu-Hu Liu
spellingShingle Ya-Qin Gao
Hai-Ling Lao
Fu-Hu Liu
Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC
Advances in High Energy Physics
author_facet Ya-Qin Gao
Hai-Ling Lao
Fu-Hu Liu
author_sort Ya-Qin Gao
title Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC
title_short Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC
title_full Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC
title_fullStr Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC
title_full_unstemmed Chemical Potentials of Light Flavor Quarks from Yield Ratios of Negative to Positive Particles in Au+Au Collisions at RHIC
title_sort chemical potentials of light flavor quarks from yield ratios of negative to positive particles in au+au collisions at rhic
publisher Hindawi Limited
series Advances in High Energy Physics
issn 1687-7357
1687-7365
publishDate 2018-01-01
description The transverse momentum spectra of π-, π+, K-, K+, p¯, and p produced in Au+Au collisions at center-of-mass energy sNN=7.7, 11.5, 19.6, 27, 39, 62.4, 130, and 200 GeV are analyzed in the framework of a multisource thermal model. The experimental data measured at midrapidity by the STAR Collaboration are fitted by the (two-component) standard distribution. The effective temperature of emission source increases obviously with the increase of the particle mass and the collision energy. At different collision energies, the chemical potentials of up, down, and strange quarks are obtained from the antiparticle to particle yield ratios in given transverse momentum ranges available in experiments. With the increase of logarithmic collision energy, the chemical potentials of light flavor quarks decrease exponentially.
url http://dx.doi.org/10.1155/2018/6047960
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AT hailinglao chemicalpotentialsoflightflavorquarksfromyieldratiosofnegativetopositiveparticlesinauaucollisionsatrhic
AT fuhuliu chemicalpotentialsoflightflavorquarksfromyieldratiosofnegativetopositiveparticlesinauaucollisionsatrhic
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