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Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs
We present an overview of a proposal in relativistic proton-proton (pp) collisions emphasizing the thermal or kinetic freeze-out stage in the framework of the Tsallis distribution. In this paper we take into account the chemical potential present in the Tsallis distribution by following a two step p...
Autores principales: | , |
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Lenguaje: | eng |
Publicado: |
2021
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Acceso en línea: | https://dx.doi.org/10.3390/physics2040038 http://cds.cern.ch/record/2750401 |
_version_ | 1780969102535294976 |
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author | Cleymans, Jean Wellington Paradza, Masimba |
author_facet | Cleymans, Jean Wellington Paradza, Masimba |
author_sort | Cleymans, Jean |
collection | CERN |
description | We present an overview of a proposal in relativistic proton-proton (pp) collisions emphasizing the thermal or kinetic freeze-out stage in the framework of the Tsallis distribution. In this paper we take into account the chemical potential present in the Tsallis distribution by following a two step procedure. In the first step we used the redudancy present in the variables such as the system temperature, T, volume, V, Tsallis exponent, q, chemical potential, μ, and performed all fits by effectively setting to zero the chemical potential. In the second step the value q is kept fixed at the value determined in the first step. This way the complete set of variables T,q,V and μ can be determined. The final results show a weak energy dependence in pp collisions at the centre-of-mass energy s=20 TeV to 13 TeV. The chemical potential μ at kinetic freeze-out shows an increase with beam energy. This simplifies the description of the thermal freeze-out stage in pp collisions as the values of T and of the freeze-out radius R remain constant to a good approximation over a wide range of beam energies. |
id | cern-2750401 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2021 |
record_format | invenio |
spelling | cern-27504012021-05-22T02:29:52Zdoi:10.3390/physics2040038http://cds.cern.ch/record/2750401engCleymans, JeanWellington Paradza, Masimba Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outshep-phParticle Physics - PhenomenologyWe present an overview of a proposal in relativistic proton-proton (pp) collisions emphasizing the thermal or kinetic freeze-out stage in the framework of the Tsallis distribution. In this paper we take into account the chemical potential present in the Tsallis distribution by following a two step procedure. In the first step we used the redudancy present in the variables such as the system temperature, T, volume, V, Tsallis exponent, q, chemical potential, μ, and performed all fits by effectively setting to zero the chemical potential. In the second step the value q is kept fixed at the value determined in the first step. This way the complete set of variables T,q,V and μ can be determined. The final results show a weak energy dependence in pp collisions at the centre-of-mass energy s=20 TeV to 13 TeV. The chemical potential μ at kinetic freeze-out shows an increase with beam energy. This simplifies the description of the thermal freeze-out stage in pp collisions as the values of T and of the freeze-out radius R remain constant to a good approximation over a wide range of beam energies.We present an overview of a proposal in relativistic proton-proton ($pp$) collisions emphasizing the thermal or kinetic freeze-out stage in the framework of the Tsallis distribution. In this paper we take into account the chemical potential present in the Tsallis distribution by following a two step procedure. In the first step we used the redundancy present in the variables such as the system temperature, $T$, volume, $V$, Tsallis exponent, $q$, chemical potential, $\mu$, and performed all fits by effectively setting to zero the chemical potential. In the second step the value $q$ is kept fixed at the value determined in the first step. This way the complete set of variables $T, q, V$ and $\mu$ can be determined. The final results show a weak energy dependence in $pp$ collisions at the centre-of-mass energy $\sqrt{s}= 6$ GeV to 13 TeV. The chemical potential $\mu$ at kinetic freeze-out shows an increase with beam energy. This simplifies the description of the thermal freeze-out stage in $pp$ collisions as the values of $T$ and of the freeze-out radius $R$ vary only mildly over a wide range of beam energies.arXiv:2101.09490oai:cds.cern.ch:27504012021-01-23 |
spellingShingle | hep-ph Particle Physics - Phenomenology Cleymans, Jean Wellington Paradza, Masimba Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs |
title | Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs |
title_full | Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs |
title_fullStr | Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs |
title_full_unstemmed | Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs |
title_short | Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs |
title_sort | tsallis statistics in high energy physics: chemical and thermal freeze-outs |
topic | hep-ph Particle Physics - Phenomenology |
url | https://dx.doi.org/10.3390/physics2040038 http://cds.cern.ch/record/2750401 |
work_keys_str_mv | AT cleymansjean tsallisstatisticsinhighenergyphysicschemicalandthermalfreezeouts AT wellingtonparadzamasimba tsallisstatisticsinhighenergyphysicschemicalandthermalfreezeouts |