J/{psi} Production via Initial State Radiation in e{sup +}e{sup -} {yields} {mu}{sup +}{mu}{sup -}{gamma} at an e{sup +}e{sup -} Center-of-Mass Energy Near 10.6 GeV
We have used a study of the process e{sup +}e{sup -} {yields} {mu}{sup +}{mu}{sup -} {gamma} at a center-of-mass energy near the {Upsilon}(4S) resonance for a {mu}{sup +}{mu}{sup -} invariant mass range near the J/{psi} mass to extract the cross section {sigma}(e{sup +}e{sup -} {yields} J/{psi}{gamma} {yields} {mu}{sup +}{mu}{sup -} {gamma}). The data set, corresponding to an integrated luminosity of 88.4 fb{sup -1}, was collected using the BaBar detector at the PEP-II collider. We measure the product {Gamma}(J/{psi} {yields} e{sup +}e{sup -})B(J/{psi} {yields} {mu}{sup +}{mu}{sup -}) to be 0.330 {+-} 0.008(stat) {+-} 0.007(syst) keV. Using the world averages for B(J/{psi} {yields} {mu}{sup +}{mu}{sup -}) and B(J/{psi} {yields} e{sup +}e{sup -}), we derive the J/{psi} electronic and total widths: Gamma(J/{psi} {yields} e{sup +}e{sup -}) = 5.61 {+-} 0.20 keV and {Gamma} = 94.7 {+-} 4.4 keV.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 826522
- Report Number(s):
- SLAC-PUB-10203; TRN: US0403358
- Resource Relation:
- Other Information: PBD: 15 Oct 2003
- Country of Publication:
- United States
- Language:
- English
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