Double-Charm Production e{sup +}e{sup -}{yields}J/{psi}+cc at B Factories with Next-to-Leading-Order QCD Corrections
- Department of Physics, Peking University, Beijing 100871 (China)
The inclusive J/{psi} production in e{sup +}e{sup -}{yields}J/{psi}cc at B factories is one of the most challenging open problems in heavy quarkonium physics. The observed cross section of this double-charm production process is larger than existing leading order (LO) QCD predictions by a factor of 5. In the nonrelativistic QCD (NRQCD) factorization formalism, we calculate the next-to-leading order (NLO) QCD virtual and real corrections to this process, and find that these corrections can substantially enhance the cross section with a K factor of about 1.8. We further take into account the feeddown contributions from higher charmonium states [mainly the {psi}(2S) as well as {chi}{sub cJ}] and the two-photon contributions, and find that the discrepancy between theory and experiment can be largely removed.
- OSTI ID:
- 20957698
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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