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e+ e- annihilation into J/psi + J/psi | | Geoffrey T Bodwin
; Jungil Lee
; Eric Braaten
; | | Date: |
25 Apr 2003 | | Journal: | Phys Rev Lett, 90 (16), 162001 | | 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 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. | | Source: | PubMed, pmid12731971 | | Services: | Forum | Review | Favorites | |
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