Cargando…
Momentum spectra of charmonium produced in a quark-gluon plasma
We calculate rapidity and transverse momentum distributions of charmonium formed in high energy heavy ion collsions from incoherent recombination of charm quarks. The results are very sensitive to the corresponding distributions of the charm quarks, and thus can serve as a probe of the state of matt...
Autores principales: | , |
---|---|
Lenguaje: | eng |
Publicado: |
2005
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevC.73.014904 http://cds.cern.ch/record/836241 |
_version_ | 1780905980206252032 |
---|---|
author | Thews, R L Mangano, Michelangelo L |
author_facet | Thews, R L Mangano, Michelangelo L |
author_sort | Thews, R L |
collection | CERN |
description | We calculate rapidity and transverse momentum distributions of charmonium formed in high energy heavy ion collsions from incoherent recombination of charm quarks. The results are very sensitive to the corresponding distributions of the charm quarks, and thus can serve as a probe of the state of matter produced in the heavy ion collision. At one extreme we generate a set of charm pair momenta directly from pQCD amplitudes, which are appropriate if one can neglect interaction of the quarks with the medium. At the other extreme we generate momenta of charm quarks in thermal equilibrium with the expanding medium, appropriate for an extremely strong interaction. Explicit predictions are made for J/Psi formation in Au-Au interactions at RHIC. We find that for the case in which charm quark momenta are unchanged from the pQCD production calculation, both the rapidity and transverse momentum spectra of the formed J/Psi are substantially narrower than would be anticipated in scenarios which do not include the in-medium formation. In particular, the average transverse momentum of the J/Psi will exhibit a non-monotonic behavior in the progression from p-p to p-A to A-A interactions. |
id | cern-836241 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2005 |
record_format | invenio |
spelling | cern-8362412019-09-30T06:29:59Zdoi:10.1103/PhysRevC.73.014904http://cds.cern.ch/record/836241engThews, R LMangano, Michelangelo LMomentum spectra of charmonium produced in a quark-gluon plasmaNuclear Physics - TheoryWe calculate rapidity and transverse momentum distributions of charmonium formed in high energy heavy ion collsions from incoherent recombination of charm quarks. The results are very sensitive to the corresponding distributions of the charm quarks, and thus can serve as a probe of the state of matter produced in the heavy ion collision. At one extreme we generate a set of charm pair momenta directly from pQCD amplitudes, which are appropriate if one can neglect interaction of the quarks with the medium. At the other extreme we generate momenta of charm quarks in thermal equilibrium with the expanding medium, appropriate for an extremely strong interaction. Explicit predictions are made for J/Psi formation in Au-Au interactions at RHIC. We find that for the case in which charm quark momenta are unchanged from the pQCD production calculation, both the rapidity and transverse momentum spectra of the formed J/Psi are substantially narrower than would be anticipated in scenarios which do not include the in-medium formation. In particular, the average transverse momentum of the J/Psi will exhibit a non-monotonic behavior in the progression from p-p to p-A to A-A interactions.nucl-th/0505055CERN-PH-TH-2005-073oai:cds.cern.ch:8362412005-05-18 |
spellingShingle | Nuclear Physics - Theory Thews, R L Mangano, Michelangelo L Momentum spectra of charmonium produced in a quark-gluon plasma |
title | Momentum spectra of charmonium produced in a quark-gluon plasma |
title_full | Momentum spectra of charmonium produced in a quark-gluon plasma |
title_fullStr | Momentum spectra of charmonium produced in a quark-gluon plasma |
title_full_unstemmed | Momentum spectra of charmonium produced in a quark-gluon plasma |
title_short | Momentum spectra of charmonium produced in a quark-gluon plasma |
title_sort | momentum spectra of charmonium produced in a quark-gluon plasma |
topic | Nuclear Physics - Theory |
url | https://dx.doi.org/10.1103/PhysRevC.73.014904 http://cds.cern.ch/record/836241 |
work_keys_str_mv | AT thewsrl momentumspectraofcharmoniumproducedinaquarkgluonplasma AT manganomichelangelol momentumspectraofcharmoniumproducedinaquarkgluonplasma |