期刊
PHYSICAL REVIEW LETTERS
卷 112, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.151801
关键词
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We present the complete next- to- next- to- next- to- leading order short- distance and bound- state QCD correction to the leptonic decay rate Gamma(gamma(1s) -> l(+) l(-)) of the lowest- lying spin- 1 bottomonium state. The perturbative QCD prediction is compared to the measurement Gamma(Y(1S) -> e(+)e(-)) = 1.340(18) keV.
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