Measurement of B (Bs →dsX) with Bs semileptonic tagging
Department
Physics
Document Type
Article
Publication Date
1-1-2022
Abstract
We report the first direct measurement of the inclusive branching fraction B(Bs→DsX) via Bs tagging in e+e-→ (5S) events. Tagging is accomplished through a partial reconstruction of semileptonic decays Bs→DsXℓν, where X denotes unreconstructed additional hadrons or photons and ℓ is an electron or muon. With 121.4 fb-1 of data collected at the (5S) resonance by the Belle detector at the KEKB asymmetric-energy e+e- collider, we obtain B(Bs→DsX)=(60.2±5.8±2.3)%, where the first uncertainty is statistical and the second is systematic.
Journal Title
Physical Review D
Journal ISSN
24700010
Volume
105
Issue
1
Digital Object Identifier (DOI)
10.1103/PhysRevD.105.012004
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