We compute the J/ψ → 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 quarkgluon plasma. Our sum rules for the J/ψ π → D̄ D*, D D̄*, D̄* D* and D̄ D 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/ψ v) ∼ 0.2-0.4 mb at T = 150 MeV.
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2003 Jun 3|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics