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Mass shift and width broadening of J/psi in hot gluonic plasma from QCD sum rules.
MedLine Citation:
PMID:  18232857     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
We investigate possible mass shift and width broadening of J/psi in hot gluonic matter using QCD sum rules. Input values of gluon condensates at finite temperature are extracted from lattice QCD data for the energy density and pressure. Although stability of the moment ratio is achieved only up to T/Tc approximately 1.05, the gluon condensates cause a decrease of the moment ratio, which results in a change of the spectral properties. Using the Breit-Wigner form for the phenomenological side, we find that the mass shift of J/psi just above Tc can reach maximally 200 MeV and the width can broaden to dozens of MeV.
Authors:
Kenji Morita; Su Houng Lee
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Publication Detail:
Type:  Journal Article     Date:  2008-01-14
Journal Detail:
Title:  Physical review letters     Volume:  100     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2008 Jan 
Date Detail:
Created Date:  2008-01-31     Completed Date:  2008-05-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  022301     Citation Subset:  -    
Affiliation:
Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Korea. morita@phya.yonsei.ac.kr
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