Measurement of the Branching Fractions for psi(2S) --> e+e- and psi(2S)-->mu+mu-

Technical Report · Mon Feb 09 23:00:00 EST 2004

DOI:https://doi.org/10.2172/826705· OSTI ID:826705

Aubert, B ^[1]

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1. SLAC

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: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 826705
• Report Number(s): SLAC-PUB-8953
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
B MESONS
DECAY
MESONS
RESONANCE
STANFORD LINEAR ACCELERATOR CENTER