Measurement of $\mathcal B (B_s \to D_sX)$ with $B_s$ semileptonic tagging

Wang, B.; Kinoshita, K.; Aihara, H.; Asner, D.M.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bakich, A.M.; Behera, P.

doi:10.1103/PhysRevD.105.012004

Measurement of $\mathcal B (B_s \to D_sX)$ with $B_s$ semileptonic tagging

Belle

Collaboration

Jun 21, 2021

9 pages

Published in:

Phys.Rev.D 105 (2022) 1, 012004

Published: Jan 1, 2022

e-Print:

2106.11265 [hep-ex]

DOI:

10.1103/PhysRevD.105.012004 (publication)

PDG:

{{\mathit B}_{{{s}}}^{0}}

\rightarrow

{{\mathit D}_{{{s}}}^{-}}

anything

Report number:

Belle Preprint 2020-21 KEK Preprint 2020-38,
University of Cincinnati Preprint UCHEP-21-05

Experiments:

KEK-BF-BELLE

View in:

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reference search5 citations

Citations per year

Abstract: (APS)

We report the first direct measurement of the inclusive branching fraction

{\mathcal B}(B_s \rightarrow D_s X)

via

B_s

tagging in

e^+e^-\to\Upsilon

(5S) events. Tagging is accomplished through a partial reconstruction of semileptonic decays

B_s \rightarrow D_s X \ell \nu

, where

X

denotes unreconstructed additional hadrons or photons and

\ell

is an electron or muon. With 121.4 fb

^{-1}

of data collected at the

\Upsilon

(5S) resonance by the Belle detector at the KEKB asymmetric-energy

e^+ e^-

collider, we obtain

{\mathcal B}(B_s \rightarrow D_s X)

=

(60.2 \pm 5.8 \pm 2.3)

%, where the first uncertainty is statistical and the second is systematic.

electron positron: annihilation
electron positron: colliding beams
B/s0: semileptonic decay
electron
muon
B/s0: branching ratio: measured
BELLE
photon
KEK-B
Upsilon(10870): electroproduction

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Measurement of B(Bs→DsX)\mathcal B (B_s \to D_sX)B(Bs​→Ds​X) with BsB_sBs​ semileptonic tagging

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Measurement of $\mathcal B (B_s \to D_sX)$ with $B_s$ semileptonic tagging