Spin alignment of vector mesons in heavy ion and proton-proton collisions

The spin alignment matrix element rho(00) for the vector mesons K{*}(0) and phi(1020) has been measured in RHIC at central rapidities. These measurements are consistent with the absence of polarization with respect to the reaction plane in mid-central Au + Au collisions whereas, when measured with r...

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Detalles Bibliográficos
Autores principales: Ayala, Alejandro, Magnin, J, Herrera Corral, G, Cuautle, Eleazar, Manuel Montano, Luis
Lenguaje:eng
Publicado: 2009
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2009.11.030
http://cds.cern.ch/record/1359394
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author Ayala, Alejandro
Magnin, J
Herrera Corral, G
Cuautle, Eleazar
Manuel Montano, Luis
author_facet Ayala, Alejandro
Magnin, J
Herrera Corral, G
Cuautle, Eleazar
Manuel Montano, Luis
author_sort Ayala, Alejandro
collection CERN
description The spin alignment matrix element rho(00) for the vector mesons K{*}(0) and phi(1020) has been measured in RHIC at central rapidities. These measurements are consistent with the absence of polarization with respect to the reaction plane in mid-central Au + Au collisions whereas, when measured with respect to the production plane in the same reactions and in p + p collisions, a non-vanishing and p(perpendicular to)-dependent rho(00) is found. We show that this behavior can be understood in a simple model of vector meson production where the spin of their constituent quarks is oriented during hadronization as the result of Thomas precession. (C) 2009 Elsevier B.V. All rights reserved.
id cern-1359394
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
record_format invenio
spelling cern-13593942023-03-29T12:48:13Zdoi:10.1016/j.physletb.2009.11.030http://cds.cern.ch/record/1359394engAyala, AlejandroMagnin, JHerrera Corral, GCuautle, EleazarManuel Montano, LuisSpin alignment of vector mesons in heavy ion and proton-proton collisionsParticle Physics - ExperimentThe spin alignment matrix element rho(00) for the vector mesons K{*}(0) and phi(1020) has been measured in RHIC at central rapidities. These measurements are consistent with the absence of polarization with respect to the reaction plane in mid-central Au + Au collisions whereas, when measured with respect to the production plane in the same reactions and in p + p collisions, a non-vanishing and p(perpendicular to)-dependent rho(00) is found. We show that this behavior can be understood in a simple model of vector meson production where the spin of their constituent quarks is oriented during hadronization as the result of Thomas precession. (C) 2009 Elsevier B.V. All rights reserved.arXiv:0906.4295oai:cds.cern.ch:13593942009-06-24
spellingShingle Particle Physics - Experiment
Ayala, Alejandro
Magnin, J
Herrera Corral, G
Cuautle, Eleazar
Manuel Montano, Luis
Spin alignment of vector mesons in heavy ion and proton-proton collisions
title Spin alignment of vector mesons in heavy ion and proton-proton collisions
title_full Spin alignment of vector mesons in heavy ion and proton-proton collisions
title_fullStr Spin alignment of vector mesons in heavy ion and proton-proton collisions
title_full_unstemmed Spin alignment of vector mesons in heavy ion and proton-proton collisions
title_short Spin alignment of vector mesons in heavy ion and proton-proton collisions
title_sort spin alignment of vector mesons in heavy ion and proton-proton collisions
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/j.physletb.2009.11.030
http://cds.cern.ch/record/1359394
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AT cuautleeleazar spinalignmentofvectormesonsinheavyionandprotonprotoncollisions
AT manuelmontanoluis spinalignmentofvectormesonsinheavyionandprotonprotoncollisions

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