Details

Autor(en) / Beteiligte

• Bodwin, Geoffrey T
• Lee, Jungil
• Braaten, Eric

Titel

e+ e- annihilation into J/psi + J/psi

Ist Teil von

• Physical review letters, 2003-04, Vol.90 (16), p.162001-162001, Article 162001

Ort / Verlag

United States

Erscheinungsjahr

2003

Quelle

PROLA

Beschreibungen/Notizen

• Recent measurements by the Belle Collaboration of the exclusive production of two charmonia in e(+)e(-) annihilation differ substantially from theoretical predictions. We suggest that a significant part of the discrepancy can be explained by the process e(+)e(-)-->J/psi+J/psi. Because the J/psi+J/psi production process can proceed through fragmentation of two virtual photons into two cc pairs, its cross section may be larger than that for J/psi+eta(c) by about a factor of 3.7, in spite of a suppression factor alpha(2)/alpha(2)(s) that is associated with the QED and QCD coupling constants.