Precise measurement of the branching fractions for $B_s\to D_s^{(*)+} D_s^{(*)-}$ and first measurement of the $D_s^{*+} D_s^{*-}$ polarization using $e^+e^-$ collisions - INSPIRE

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Precise measurement of the branching fractions for $B_s\to D_s^{()+} D_s^{()-}$ and first measurement of the $D_s^{+} D_s^{-}$ polarization using $e^+e^-$ collisions

Belle

Collaboration

•

S. Esen
(
- Cincinnati U.
)

Aug, 2012

6 pages

Published in:

Phys.Rev.D 87 (2013) 3, 031101

Published: Feb 12, 2013

e-Print:

1208.0323 [hep-ex]

DOI:

10.1103/PhysRevD.87.031101

PDG:

{{\mathit \Upsilon}{(10860)}}

\rightarrow

{{\mathit B}_{{{s}}}^{(*)}}{{\overline{\mathit B}}_{{{s}}}^{(*)}}

Report number:

KEK-PREPRINT-2012-20,
UCHEP-12-11,
UNIVERSITY-OF-CINCINNATI-PREPRINT-UCHEP-12-11

Experiments:

KEK-BF-BELLE

View in:

reference search60 citations

Citations per year

Abstract: (APS)

We have made a precise measurement of the absolute branching fractions of Bs0→Ds(*)+Ds(*)- decays using 121.4 fb-1 of data recorded by the Belle experiment running at the Υ(5S) resonance. The results are B(Bs0→Ds+Ds-)=(0.58-0.09+0.11±0.13)%, B(Bs0→Ds*±Ds∓)=(1.76-0.22+0.23±0.40)%, and B(Bs0→Ds*+Ds*-)=(1.98-0.31-0.50+0.33+0.52)%; the sum is B(Bs0→Ds(*)+Ds(*)-)=(4.32-0.39-1.03+0.42+1.04)%. Assuming Bs0→Ds(*)+Ds(*)- saturates decays to CP-even final states, the branching fraction constrains the ratio ΔΓs/cos⁡ϕ12, where ΔΓs is the difference in widths between the two Bs-B¯s mass eigenstates, and ϕ12 is the CP-violating phase in Bs-B¯s mixing. We also measure for the first time the longitudinal polarization fraction of Bs0→Ds*+Ds*-; the result is 0.06-0.17+0.18±0.03.

Note:

14 pages, 2 figures, 2 tables (v3: as published in Phys. Rev. D Rapid Communications)

13.25.Hw
11.30.Er
12.15.Ff
14.40.Nd
B/s0: branching ratio: measured
D/s: final state
polarization: longitudinal
CP: violation
BELLE
electron positron: annihilation

References(28)

Figures(10)

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