Progress in the determination of the J/ ψ-π cross section

Francisco O. Durães, Hungchong Kim, Su Houng Lee, Fernando S. Navarra, Marina Nielsen

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Improving previous calculations, we compute the J/ψπ→ charmed meson cross section using QCD sum rules. 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 in the soft-pion limit. Our results suggest that using meson exchange models is perfectly acceptable, provided that they include form factors and that they respect chiral symmetry. After evaluating a thermal average we get 〈 σ πJ/ψv〉∼0.3 mb at T = 150 MeV.

Original languageEnglish
Article number035208
Pages (from-to)352081-3520811
Number of pages3168731
JournalPhysical Review C - Nuclear Physics
Volume68
Issue number3
Publication statusPublished - 2003 Sep

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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