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Anti–de Sitter/Conformal-Field-Theory Calculation of Screening in a Hot Wind
One of the challenges in relating experimental measurements of the suppression in the number of J/ψ mesons produced in heavy ion collisions to lattice QCD calculations is that whereas the lattice calculations treat J/ψ mesons at rest, in a heavy ion collision a cc̅ pair can have a significant veloci...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
2006
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.98.182301 http://cds.cern.ch/record/970465 |
_version_ | 1780910763910627328 |
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author | Liu, Hong Rajagopal, Krishna Wiedemann, Urs Achim |
author_facet | Liu, Hong Rajagopal, Krishna Wiedemann, Urs Achim |
author_sort | Liu, Hong |
collection | CERN |
description | One of the challenges in relating experimental measurements of the suppression in the number of J/ψ mesons produced in heavy ion collisions to lattice QCD calculations is that whereas the lattice calculations treat J/ψ mesons at rest, in a heavy ion collision a cc̅ pair can have a significant velocity with respect to the hot fluid produced in the collision. The putative J/ψ finds itself in a hot wind. We present the first rigorous nonperturbative calculation of the consequences of a wind velocity v on the screening length Ls for a heavy quark-antiquark pair in hot N=4 supersymmetric QCD. We find Ls(v,T)=f(v)[1-v2]1/4/πT with f(v) only mildly dependent on v and the wind direction. This Ls(v,T)∼Ls(0,T)/sqrt[γ] velocity scaling, if realized in QCD, provides a significant additional source of J/ψ suppression at transverse momenta which are high but within experimental reach. |
id | cern-970465 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2006 |
record_format | invenio |
spelling | cern-9704652023-03-14T19:48:50Zdoi:10.1103/PhysRevLett.98.182301http://cds.cern.ch/record/970465engLiu, HongRajagopal, KrishnaWiedemann, Urs AchimAnti–de Sitter/Conformal-Field-Theory Calculation of Screening in a Hot WindParticle Physics - PhenomenologyOne of the challenges in relating experimental measurements of the suppression in the number of J/ψ mesons produced in heavy ion collisions to lattice QCD calculations is that whereas the lattice calculations treat J/ψ mesons at rest, in a heavy ion collision a cc̅ pair can have a significant velocity with respect to the hot fluid produced in the collision. The putative J/ψ finds itself in a hot wind. We present the first rigorous nonperturbative calculation of the consequences of a wind velocity v on the screening length Ls for a heavy quark-antiquark pair in hot N=4 supersymmetric QCD. We find Ls(v,T)=f(v)[1-v2]1/4/πT with f(v) only mildly dependent on v and the wind direction. This Ls(v,T)∼Ls(0,T)/sqrt[γ] velocity scaling, if realized in QCD, provides a significant additional source of J/ψ suppression at transverse momenta which are high but within experimental reach.One of the challenges in relating experimental measurements of the suppression in the number of J/\psi mesons produced in heavy ion collisions to lattice QCD calculations is that whereas the lattice calculations treat J/\psi mesons at rest, in a heavy ion collision a c\bar c pair can have a significant velocity with respect to the hot fluid produced in the collision. The putative J/\psi finds itself in a hot wind. We present the first rigorous non-perturbative calculation of the consequences of a wind velocity v on the screening length L_s for a heavy quark-antiquark pair in hot N=4 supersymmetric QCD. We find L_s(v,T) = f(v)[1-v^2]^{1/4}/\pi T with f(v) only mildly dependent on v and the wind direction. This L_s(v,T)\sim L_s(0,T)/\sqrt{\gamma} velocity scaling, if realized in QCD, provides a significant additional source of J/\Psi suppression at transverse momenta which are high but within experimental reach.hep-ph/0607062MIT-CTP-3757CERN-PH-TH-2006-121MIT-CTP-3757oai:cds.cern.ch:9704652006-07-06 |
spellingShingle | Particle Physics - Phenomenology Liu, Hong Rajagopal, Krishna Wiedemann, Urs Achim Anti–de Sitter/Conformal-Field-Theory Calculation of Screening in a Hot Wind |
title | Anti–de Sitter/Conformal-Field-Theory Calculation of Screening in a Hot Wind |
title_full | Anti–de Sitter/Conformal-Field-Theory Calculation of Screening in a Hot Wind |
title_fullStr | Anti–de Sitter/Conformal-Field-Theory Calculation of Screening in a Hot Wind |
title_full_unstemmed | Anti–de Sitter/Conformal-Field-Theory Calculation of Screening in a Hot Wind |
title_short | Anti–de Sitter/Conformal-Field-Theory Calculation of Screening in a Hot Wind |
title_sort | anti–de sitter/conformal-field-theory calculation of screening in a hot wind |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1103/PhysRevLett.98.182301 http://cds.cern.ch/record/970465 |
work_keys_str_mv | AT liuhong antidesitterconformalfieldtheorycalculationofscreeninginahotwind AT rajagopalkrishna antidesitterconformalfieldtheorycalculationofscreeninginahotwind AT wiedemannursachim antidesitterconformalfieldtheorycalculationofscreeninginahotwind |