Observation of $B_s^0 -> D_s^{*-} \pi^+, B_s^0 - >D_s^{(*)-} \ rho^+$ Decays and Measurement of $B_s^0 -> D_s^{*-} \rho^+$ Polarization - INSPIRE

DataBETA

Observation of $B_s^0 -> D_s^{-} \pi^+, B_s^0 - >D_s^{()-} \ rho^+$ Decays and Measurement of $B_s^0 -> D_s^{*-} \rho^+$ Polarization

Belle

Collaboration

•

R. Louvot
(
- Ecole Polytechnique
)

Mar, 2010

6 pages

Published in:

Phys.Rev.Lett. 104 (2010) 231801

e-Print:

1003.5312 [hep-ex]

DOI:

10.1103/PhysRevLett.104.231801

PDG:

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

\rightarrow

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

Report number:

KEK-PREPRINT-2010-5,
BELLE-PREPRINT-2010-7

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

reference search27 citations

Citations per year

Abstract: (arXiv)

First observations of the B_s0->D_s*- pi+, B_s0->D_s- rho+ and B_s0->D_s*- rho+ decays are reported together with measurements of their branching fractions: B(B_s0->D_s*- pi+)=(2.4 +0.5-0.4(stat.) +-0.3(syst.) +-0.4(fs))x10^(-3), B(Bs->D_s- rho+)=(8.5 +1.3-1.2(stat.) +-1.1(syst.) +-1.3(fs))x10^(-3) and B(Bs->D_s*- rho+)=(11.8 +2.2-2.0(stat.) +-1.7(syst.) +-1.8(fs))x10^(-3) (f_s=N(B_s(*)B_s(*)-bar)/N(b b-bar)). From helicity-angle distributions, we measured the longitudinal polarization fraction in B_s0->D_s*- rho+ decays to be f_L(Bs->D_s*- rho+)=1.05 +0.08-0.10(stat.) +0.03-0.04(syst.). These results are based on a 23.6 /fb data sample collected at the Y(5S) resonance with the Belle detector at the KEKB e+e- collider.

Note:

6 pages, 2 figures; submitted to Phys. Rev. Lett.

13.25.Gv
13.25.Hw
13.88.+e
12.39.Hg
electron positron: annihilation
bottom meson: pair production
polarization: longitudinal
HQET model
B/s0: hadronic decay
B/s0: branching ratio: measured

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