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Inclusive radiative J/ψ decays

Abstract:

Using data taken with the CLEO-c detector at the Cornell Electron Storage Ring, we have investigated the direct-photon momentum spectrum in the decay J/ψ(1S)→γgg, via the "tagged" process: e+e-→ψ(2S); ψ(2S)→J/ψπ+π-; J/ψ→γ+X. Including contributions from two-body radiative decay processes, we find the ratio of the inclusive direct-photon branching fraction to that of the dominant three-gluon branching fraction [Rγ=B(ggγ)/B(ggg)] to be Rγ=0.137±0.001±0.016±0.004, where the errors shown are stat...

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Publisher copy:
10.1103/PhysRevD.78.032012

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Journal:
Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume:
78
Issue:
3
Publication date:
2008-08-19
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
URN:
uuid:a66f625f-e581-4cc0-a709-f25142212f5e
Source identifiers:
160930
Local pid:
pubs:160930
Language:
English

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