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Collective flows of protons and $\pi^-$ mesons in $^{2}$H + C, Ta and He plus C, Ta collisions at 3.4 GeV/nucleon

Collective flows of protons and negative pions have been studied in (2)H + C, Ta and He + C, Ta collisions at an energy of 3.4 GeV/nucleon. The data have been obtained by the 2-m Propane Bubble Chamber (PBC-500) at JINR. It is found that the directed flow of protons and pi(-) mesons characterized by...

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Autores principales: Chkhaidze, L, Galoyan, A, Djobava, T, Kladnitskaya, E, Kharkhelauri, L, Uzhinsky, V
Lenguaje:eng
Publicado: 2011
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.84.064915
http://cds.cern.ch/record/1443504
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author Chkhaidze, L
Galoyan, A
Djobava, T
Kladnitskaya, E
Kharkhelauri, L
Uzhinsky, V
author_facet Chkhaidze, L
Galoyan, A
Djobava, T
Kladnitskaya, E
Kharkhelauri, L
Uzhinsky, V
author_sort Chkhaidze, L
collection CERN
description Collective flows of protons and negative pions have been studied in (2)H + C, Ta and He + C, Ta collisions at an energy of 3.4 GeV/nucleon. The data have been obtained by the 2-m Propane Bubble Chamber (PBC-500) at JINR. It is found that the directed flow of protons and pi(-) mesons characterized by d < P(x)>/d(y) increases with increase of the mass numbers of colliding nucleus pairs; the elliptic proton flow points out of the reaction plane and also strengthens as the system mass increases; the negative pion directed flow is in the same reaction plane as the proton flow for the lighter (2H + C, He + C) systems and in the opposite direction for the heavier ((2)H + Ta, He + Ta) systems. In (2)H + C, He + C, C + C, C + Ne, (2)H + Ta, He + Ta, C + Cu, and C + Ta collisions, the linear dependence of directed and elliptic flow parameters from mass numbers of projectile and target nuclei, (A(P).A(T))(1/2), is similar for protons while for pi(-) mesons the dependence of directed flow parameters is stronger. The ultrarelativistic quantum molecular dynamical model (URQMD) enlarged by the statistical multifragmentation model (SMM) satisfactorily describes the obtained experimental results for all pairs of nuclei. The data for such asymmetric nuclear collisions are obtained, to the best of our knowledge, for the first time.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
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spelling cern-14435042019-09-30T06:29:59Zdoi:10.1103/PhysRevC.84.064915http://cds.cern.ch/record/1443504engChkhaidze, LGaloyan, ADjobava, TKladnitskaya, EKharkhelauri, LUzhinsky, VCollective flows of protons and $\pi^-$ mesons in $^{2}$H + C, Ta and He plus C, Ta collisions at 3.4 GeV/nucleonNuclear Physics - ExperimentCollective flows of protons and negative pions have been studied in (2)H + C, Ta and He + C, Ta collisions at an energy of 3.4 GeV/nucleon. The data have been obtained by the 2-m Propane Bubble Chamber (PBC-500) at JINR. It is found that the directed flow of protons and pi(-) mesons characterized by d < P(x)>/d(y) increases with increase of the mass numbers of colliding nucleus pairs; the elliptic proton flow points out of the reaction plane and also strengthens as the system mass increases; the negative pion directed flow is in the same reaction plane as the proton flow for the lighter (2H + C, He + C) systems and in the opposite direction for the heavier ((2)H + Ta, He + Ta) systems. In (2)H + C, He + C, C + C, C + Ne, (2)H + Ta, He + Ta, C + Cu, and C + Ta collisions, the linear dependence of directed and elliptic flow parameters from mass numbers of projectile and target nuclei, (A(P).A(T))(1/2), is similar for protons while for pi(-) mesons the dependence of directed flow parameters is stronger. The ultrarelativistic quantum molecular dynamical model (URQMD) enlarged by the statistical multifragmentation model (SMM) satisfactorily describes the obtained experimental results for all pairs of nuclei. The data for such asymmetric nuclear collisions are obtained, to the best of our knowledge, for the first time.oai:cds.cern.ch:14435042011
spellingShingle Nuclear Physics - Experiment
Chkhaidze, L
Galoyan, A
Djobava, T
Kladnitskaya, E
Kharkhelauri, L
Uzhinsky, V
Collective flows of protons and $\pi^-$ mesons in $^{2}$H + C, Ta and He plus C, Ta collisions at 3.4 GeV/nucleon
title Collective flows of protons and $\pi^-$ mesons in $^{2}$H + C, Ta and He plus C, Ta collisions at 3.4 GeV/nucleon
title_full Collective flows of protons and $\pi^-$ mesons in $^{2}$H + C, Ta and He plus C, Ta collisions at 3.4 GeV/nucleon
title_fullStr Collective flows of protons and $\pi^-$ mesons in $^{2}$H + C, Ta and He plus C, Ta collisions at 3.4 GeV/nucleon
title_full_unstemmed Collective flows of protons and $\pi^-$ mesons in $^{2}$H + C, Ta and He plus C, Ta collisions at 3.4 GeV/nucleon
title_short Collective flows of protons and $\pi^-$ mesons in $^{2}$H + C, Ta and He plus C, Ta collisions at 3.4 GeV/nucleon
title_sort collective flows of protons and $\pi^-$ mesons in $^{2}$h + c, ta and he plus c, ta collisions at 3.4 gev/nucleon
topic Nuclear Physics - Experiment
url https://dx.doi.org/10.1103/PhysRevC.84.064915
http://cds.cern.ch/record/1443504
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