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Temperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p-Pb and Pb-Pb collisions

We present a new approach to take into account resonance decays in the blast-wave model fits of identified hadron spectra. Thanks to precalculated decayed particle spectra, we are able to extract, in a matter of seconds, the multiplicity dependence of the single freeze-out temperature Tfo, average f...

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Detalles Bibliográficos
Autores principales: Mazeliauskas, Aleksas, Vislavicius, Vytautas
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.101.014910
http://cds.cern.ch/record/2799965
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author Mazeliauskas, Aleksas
Vislavicius, Vytautas
author_facet Mazeliauskas, Aleksas
Vislavicius, Vytautas
author_sort Mazeliauskas, Aleksas
collection CERN
description We present a new approach to take into account resonance decays in the blast-wave model fits of identified hadron spectra. Thanks to precalculated decayed particle spectra, we are able to extract, in a matter of seconds, the multiplicity dependence of the single freeze-out temperature Tfo, average fluid velocity βT, velocity exponent n, and the volume dV/dy of an expanding fireball. In contrast to blast-wave fits without resonance feed-down, our approach results in a freeze-out temperature of Tfo≈150MeV, which has only weak dependence on multiplicity and collision system. Finally, we discuss separate chemical and kinetic freeze-outs separated by partial chemical equilibrium.
id cern-2799965
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2019
record_format invenio
spelling cern-27999652022-01-25T11:04:34Zdoi:10.1103/PhysRevC.101.014910http://cds.cern.ch/record/2799965engMazeliauskas, AleksasVislavicius, VytautasTemperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p-Pb and Pb-Pb collisionsParticle Physics - PhenomenologyNuclear Physics - TheoryNuclear Physics - ExperimentWe present a new approach to take into account resonance decays in the blast-wave model fits of identified hadron spectra. Thanks to precalculated decayed particle spectra, we are able to extract, in a matter of seconds, the multiplicity dependence of the single freeze-out temperature Tfo, average fluid velocity βT, velocity exponent n, and the volume dV/dy of an expanding fireball. In contrast to blast-wave fits without resonance feed-down, our approach results in a freeze-out temperature of Tfo≈150MeV, which has only weak dependence on multiplicity and collision system. Finally, we discuss separate chemical and kinetic freeze-outs separated by partial chemical equilibrium.We present a new approach to take into account resonance decays in the blast-wave model fits of identified hadron spectra. Thanks to pre-calculated decayed particle spectra, we are able to extract, in a matter of seconds, the multiplicity dependence of the single freeze-out temperature $T_{\rm fo}$, average fluid velocity $\left<\beta_{\rm T}\right>$, velocity exponent $n$, and the volume $dV/dy$ of an expanding fireball. In contrast to blast-wave fits without resonance feed-down, our approach results in a freeze-out temperature of $T_{\rm fo}\approx 150\,\text{MeV}$, which has only weak dependence on multiplicity and collision system. Finally, we discuss separate chemical and kinetic freeze-outs separated by partial chemical equilibrium.arXiv:1907.11059oai:cds.cern.ch:27999652019-07-25
spellingShingle Particle Physics - Phenomenology
Nuclear Physics - Theory
Nuclear Physics - Experiment
Mazeliauskas, Aleksas
Vislavicius, Vytautas
Temperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p-Pb and Pb-Pb collisions
title Temperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p-Pb and Pb-Pb collisions
title_full Temperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p-Pb and Pb-Pb collisions
title_fullStr Temperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p-Pb and Pb-Pb collisions
title_full_unstemmed Temperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p-Pb and Pb-Pb collisions
title_short Temperature and fluid velocity on the freeze-out surface from $\pi$, $K$, $p$ spectra in pp, p-Pb and Pb-Pb collisions
title_sort temperature and fluid velocity on the freeze-out surface from $\pi$, $k$, $p$ spectra in pp, p-pb and pb-pb collisions
topic Particle Physics - Phenomenology
Nuclear Physics - Theory
Nuclear Physics - Experiment
url https://dx.doi.org/10.1103/PhysRevC.101.014910
http://cds.cern.ch/record/2799965
work_keys_str_mv AT mazeliauskasaleksas temperatureandfluidvelocityonthefreezeoutsurfacefrompikpspectrainppppbandpbpbcollisions
AT vislaviciusvytautas temperatureandfluidvelocityonthefreezeoutsurfacefrompikpspectrainppppbandpbpbcollisions