Abstract
We calculate the exclusive cross sections for e+e- annihilation into two charmonium states through a virtual photon. Purely electromagnetic contributions are surprisingly large, changing the cross sections by as much as 21%. The predicted cross section for J/ψ+ ηc is about an order of magnitude smaller than a recent measurement by the BELLE Collaboration, although part of the discrepancy can be attributed to large relativistic corrections. The cross sections for S-wave + P-wave, P-wave + P-wave, and S-wave + D-wave charmonium states are also calculated. It may be possible to discover the D-wave state η c2(1D) at the B factories through the mode J/ψ+ ηc2, whose cross section is predicted to be about a factor of 10 smaller than J/ψ+ ηc.
Original language | English |
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Article number | 054007 |
Journal | Physical Review D |
Volume | 67 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2003 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)