Cargando…
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...
Autores principales: | , |
---|---|
Lenguaje: | eng |
Publicado: |
2019
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevC.101.014910 http://cds.cern.ch/record/2799965 |
_version_ | 1780972603219902464 |
---|---|
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 |