Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Cleymans, Jean, Wellington Paradza, Masimba 
Lenguaje:eng
Publicado: 2021
Materias:
Acceso en línea:https://dx.doi.org/10.3390/physics2040038
http://cds.cern.ch/record/2750401
_version_ 1780969102535294976
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