Measurement of the Branching Fractions for psi(2S) --> e+e- and psi(2S)-->mu+mu-
The authors measure the branching fractions of the {psi}(2S) meson to the leptonic final states e{sup +}e{sup -} and {mu}{sup +}{mu}{sup -} relative to that for {psi}(2S) {yields} J/{psi} {pi}{sup +}{pi}{sup -}. The method uses {psi}(2S) mesons produced in the decay of B mesons at the {Upsilon}(4S) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the {psi}(2S) {yields} J/{psi} {pi}{sup +}{pi}{sup -} branching fraction, they determine the e{sup +}e{sup -} and {mu}{sup +}{mu}{sup -} branching fractions to be 0.0078 {+-} 0.0009 {+-} 0.0008 and 0.0067 {+-} 0.0008 {+-} 0.0007 respectively.
- 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:
- 826705
- Report Number(s):
- SLAC-PUB-8953; TRN: US0404128
- Resource Relation:
- Other Information: PBD: 10 Feb 2004
- Country of Publication:
- United States
- Language:
- English
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