Leptonic decay of the Upsilon(1S) meson at third order in QCD

Martin Beneke , Yuichiro Kiyo , Peter Marquard , Alexander Penin , Jan Piclum , Dirk Seidel , Matthias Steinhauser

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classification ✦ hep-ph

keywords upsilondecaygammaleptonicorderbottomoniumbound-statecompared

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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(Upsilon(1S)->l+l-) of the lowest-lying spin-1 bottomonium state. The perturbative QCD prediction is compared to the measurement Gamma(Upsilon(1S)->e+e-)=1.340(18) keV.

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Leptonic decay of the Upsilon(1S) meson at third order in QCD

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