The universal freeze-out criterion at SPS and RHIC

We formulate a freeze-out criterion for ultra-relativistic heavy ion collisions in terms of the pion escape probability from the collision region. We find that the increase in pion phase-space density from SPS to RHIC reported at this conference has a small influence on particle freeze-out because o...

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Detalles Bibliográficos
Autores principales: Tomasik, Boris, Wiedemann, Urs Achim
Lenguaje:eng
Publicado: 2002
Materias:
Nuclear Physics - Theory
Acceso en línea:https://dx.doi.org/10.1016/S0375-9474(02)01552-X
http://cds.cern.ch/record/578405
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author Tomasik, Boris
Wiedemann, Urs Achim
author_facet Tomasik, Boris
Wiedemann, Urs Achim
author_sort Tomasik, Boris
collection CERN
description We formulate a freeze-out criterion for ultra-relativistic heavy ion collisions in terms of the pion escape probability from the collision region. We find that the increase in pion phase-space density from SPS to RHIC reported at this conference has a small influence on particle freeze-out because of the small pi-pi cross-section. Our treatment takes into account dynamical expansion, chemical composition and momentum of the escaping particle for particle freeze-out. It supports a freeze-out at rather low temperature - below 100 MeV - and earlier decoupling of high p_t particles.
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institution Organización Europea para la Investigación Nuclear
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publishDate 2002
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spelling cern-5784052023-03-14T17:04:41Zdoi:10.1016/S0375-9474(02)01552-Xhttp://cds.cern.ch/record/578405engTomasik, BorisWiedemann, Urs AchimThe universal freeze-out criterion at SPS and RHICNuclear Physics - TheoryWe formulate a freeze-out criterion for ultra-relativistic heavy ion collisions in terms of the pion escape probability from the collision region. We find that the increase in pion phase-space density from SPS to RHIC reported at this conference has a small influence on particle freeze-out because of the small pi-pi cross-section. Our treatment takes into account dynamical expansion, chemical composition and momentum of the escaping particle for particle freeze-out. It supports a freeze-out at rather low temperature - below 100 MeV - and earlier decoupling of high p_t particles.We formulate a freeze-out criterion for ultra-relativistic heavy ion collisions in terms of the pion escape probability from the collision region. We find that the increase in pion phase-space density from SPS to RHIC reported at this conference has a small influence on particle freeze-out because of the small pi-pi cross-section. Our treatment takes into account dynamical expansion, chemical composition and momentum of the escaping particle for particle freeze-out. It supports a freeze-out at rather low temperature - below 100 MeV - and earlier decoupling of high p_t particles.We formulate a freeze-out criterion for ultra-relativistic heavy ion collisions in terms of the pion escape probability from the collision region. We find that the increase in pion phase-space density from SPS to RHIC reported at this conference has a small influence on particle freeze-out because of the small ππ cross-section. Our treatment takes into account dynamical expansion, chemical composition and momentum of the escaping particle for particle freeze-out. It supports a freeze-out at rather low temperature—below 100 MeV—and earlier decoupling of high p ⊥ particles.nucl-th/0208065CERN-TH-2002-215CERN-TH-2002-215oai:cds.cern.ch:5784052002-08-29
spellingShingle Nuclear Physics - Theory
Tomasik, Boris
Wiedemann, Urs Achim
The universal freeze-out criterion at SPS and RHIC
title The universal freeze-out criterion at SPS and RHIC
title_full The universal freeze-out criterion at SPS and RHIC
title_fullStr The universal freeze-out criterion at SPS and RHIC
title_full_unstemmed The universal freeze-out criterion at SPS and RHIC
title_short The universal freeze-out criterion at SPS and RHIC
title_sort universal freeze-out criterion at sps and rhic
topic Nuclear Physics - Theory
url https://dx.doi.org/10.1016/S0375-9474(02)01552-X
http://cds.cern.ch/record/578405
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AT wiedemannursachim theuniversalfreezeoutcriterionatspsandrhic
AT tomasikboris universalfreezeoutcriterionatspsandrhic
AT wiedemannursachim universalfreezeoutcriterionatspsandrhic

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