A Measurement Of The Semileptonic Decay Of B-Mesons Into Muons

G M Levman, V A Sreedhar,K Han, R Imlay,W Metcalf, H Dietl,G Eigen,Vivian Fonseca, E Lorenz,G Mageras, F Pauss,H Vogel, J E Horstkotte, C Klopfenstein, J Leefranzini,L Romero,R D Schamberger,M Sivertz,L J Spencer,P Franzini,D Peterson,E Rice,D Son,P M Tuts,S Youssef,Tianchi Zhao, S W Herb

PHYSICS LETTERS B（1984）

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Abstract

We have observed muons from the semileptonic decay B → Xμν where B meson are produced in e+e− annihilations into hadrons at the γ(4S) resonance (10.58 GeV). We obtain a branching ratio of (11.2 ± 0.9 ± 1.0)% for B → Xμν. We have also measured the production of energetic muons in hadronic e+e− annihilations in the energy region above the γ(4S) from 10.6 GeV to 11.2 GeV.

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Key words

semileptonic decay,muons

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