J/ψ dissociation by pions in QCD

We compute the J/ψπ→charmed mesons cross section using QCD sum rules. This cross section is important to distinguish the suppression in the production of J/ψ through the dissociation by comoving pions and through the formation of quark–gluon plasma. Our sum rules for the J/ψπ→D̄D∗, DD̄∗, D̄∗D∗ and D...

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Bibliographic Details
Published in:Physics letters. B 2003-07, Vol.564 (1-2), p.97-103
Main Authors: Durães, Francisco O., Lee, Su Houng, Navarra, Fernando S., Nielsen, Marina
Format: Article
Language:English
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Summary:We compute the J/ψπ→charmed mesons cross section using QCD sum rules. This cross section is important to distinguish the suppression in the production of J/ψ through the dissociation by comoving pions and through the formation of quark–gluon plasma. Our sum rules for the J/ψπ→D̄D∗, DD̄∗, D̄∗D∗ and D̄D hadronic matrix elements are constructed by using vacuum–pion correlation functions, and we work up to twist-4. After doing a thermal average we get 〈σπJ/ψv〉∼0.2–0.4 mb at T=150MeV.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(03)00709-3