Measurement of {gamma}{sub ee}(J/{psi}), {gamma}{sub tot}(J/{psi}), and {gamma}{sub ee}[{psi}(2S)]/{gamma}{sub ee}(J/{psi})

Journal Article · Wed Mar 01 04:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.051103· OSTI ID:20776819

Adams, G S; Anderson, M; Cummings, J P; Danko, I; Napolitano, J ^[1]; He, Q; Insler, J; Muramatsu, H; Park, C S; Thorndike, E H ^[2]; Coan, T E; Gao, Y S; Liu, F; Stroynowski, R ^[3]; Artuso, M; Blusk, S; Butt, J; Li, J; Menaa, N; Mountain, R ^[4]

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1. Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)
2. University of Rochester, Rochester, New York 14627 (United States)
3. Southern Methodist University, Dallas, Texas 75275 (United States)
4. Syracuse University, Syracuse, New York 13244 (United States)

Using data acquired with the CLEO detector at the CESR e{sup +}e{sup -} collider at {radical}(s)=3.773 GeV, we measure the cross section for the radiative return process e{sup +}e{sup -}{yields}{gamma}J/{psi}, J/{psi}{yields}{mu}{sup +}{mu}{sup -}, resulting in B(J/{psi}{yields}{mu}{sup +}{mu}{sup -})x{gamma}{sub ee}(J/{psi})=0.3384{+-}0.0058{+-}0.0071 keV, {gamma}{sub ee}(J/{psi})=5.68{+-}0.11{+-}0.13 keV, and {gamma}{sub tot}(J/{psi})=95.5{+-}2.4{+-}2.4 keV, in which the errors are statistical and systematic, respectively. We also determine the ratio {gamma}{sub ee}[{psi}(2S)]/{gamma}{sub ee}(J/{psi})=0.45{+-}0.01{+-}0.02.

• OSTI ID: 20776819
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 73; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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CROSS SECTIONS
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KEV RANGE
LEPTONIC DECAY
MULTIPARTICLE SPECTROMETERS
MUONS MINUS
MUONS PLUS
PARTICLE IDENTIFICATION
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