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e^+ e^- Annihilation into J/psi + J/psi | | Geoffrey T. Bodwin
; Eric Braaten
; Jungil Lee
; | | Date: |
13 Dec 2002 | | Journal: | Phys.Rev.Lett. 90 (2003) 162001 | | Affiliation: | Argonne), Eric Braaten (Ohio State & Fermilab), Jungil Lee (Korea U | | Abstract: | 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-bar pairs, its cross section may be larger than that for J/psi +eta_c by about a factor 1.8, in spite of a suppression factor alpha^2/alpha_s^2 that is associated with the QED and QCD coupling constants. | | Source: | arXiv, hep-ph/0212181 | | Services: | Forum | Review | PDF | Favorites | |
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