Measurement of the branching fractions for psi(2S)-->e+e- and psi(2S)-->mu+mu-

Abstract

We measure the branching fractions of the psi(2S) meson to the leptonic final states e+e- and mu+mu- relative to that for psi(2S)-->J/psi pi+pi-. 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)-->J/psi pi+pi- branching fraction, we determine the e+e- and mu+mu- branching fractions to be 0.0078+/-0.0009+/-0.0008 and 0.0067+/-0.0008+/-0.0007 respectively.

7 pages, 2 figures, published as Physical Review D 65 031101(R) rapid communications

References in corpus (1)

• Psi(2S) -> pi^+ pi^- J/psi Decay Distributions

Cited by in corpus (7)

• Study of Inclusive Production of Charmonium Mesons in B Decay
• A Measurement of Psi(2S) Resonance Parameters
• Observation of ${\Lambda }_b^0\to \psi (2S)p{K}^{-}$ and ${\Lambda }_b^0\to J/\psi {\pi }^{+}{\pi }^{-}p{K}^{-}$ decays and a measurement of the ${\Lambda }_b^0$ baryon mass
• A theoretical review of heavy quarkonium inclusive decays
• Measurement of Inclusive B --> psi Production
• Measurement of the branching ratios ${\psi }^{\prime }\to e^{+}{e}^{-}$, ${\psi }^{\prime }\to J/\psi \pi \pi$ and ${\psi }^{\prime }\to J/\psi \eta$
• Improved measurement of $\psi (2S)$ decays into ${\tau }^{+}{\tau }^{-}$