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

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

doi:10.1103/PhysRevLett.112.151801

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

Phys Rev Lett. 2014 Apr 18;112(15):151801. doi: 10.1103/PhysRevLett.112.151801. Epub 2014 Apr 16.

Authors

Martin Beneke¹, Yuichiro Kiyo², Peter Marquard³, Alexander Penin⁴, Jan Piclum¹, Dirk Seidel⁵, Matthias Steinhauser⁶

Affiliations

¹ Physik Department T31, James-Franck-Straße 1, Technische Universität München, 85748 Garching, Germany and Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen, 52056 Aachen, Germany.
² Department of Physics, Juntendo University, Inzai, Chiba 270-1695, Japan.
³ Deutsches Elektronen Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany.
⁴ Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada.
⁵ Theoretische Physik 1, Universität Siegen, 57068 Siegen, Germany.
⁶ Institut für Theoretische Teilchenphysik, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany.

PMID: 24785029
DOI: 10.1103/PhysRevLett.112.151801

Abstract

We present the complete next-to-next-to-next-to-leading order short-distance and bound-state QCD correction to the leptonic decay rate Γ(ϒ(1S)→ℓ+ℓ-) of the lowest-lying spin-1 bottomonium state. The perturbative QCD prediction is compared to the measurement Γ(ϒ(1S)→e+e-)=1.340(18) keV.