2014

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

Beneke, Martin, Kiyo, Yuichiro, Marquard, Peter et al.

Understand

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.

Reading the bibliography…