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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 [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2003.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
8 pages : digital, PDF file
Additional Creators:
Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
We have used a study of the process e⁺e⁻ → μ⁺μ⁻ γ at a center-of-mass energy near the Υ(4S) resonance for a μ⁺μ⁻ invariant mass range near the J/ψ mass to extract the cross section σ(e⁺e⁻ → J/ψγ → μ⁺μ⁻ γ). The data set, corresponding to an integrated luminosity of 88.4 fb⁻¹, was collected using the BaBar detector at the PEP-II collider. We measure the product Γ(J/ψ → e⁺e⁻)B(J/ψ → μ⁺μ⁻) to be 0.330 ± 0.008(stat) ± 0.007(syst) keV. Using the world averages for B(J/ψ → μ⁺μ⁻) and B(J/ψ → e⁺e⁻), we derive the J/ψ electronic and total widths: Gamma(J/ψ → e⁺e⁻) = 5.61 ± 0.20 keV and Γ = 94.7 ± 4.4 keV.
Report Numbers:
E 1.99:slac-pub-10203
slac-pub-10203
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
10/15/2003.
"slac-pub-10203"
Druzhinin, V.
Type of Report and Period Covered Note:
Topical;
Funding Information:
AC03-76SF00515
View MARC record | catkey: 14711372