Measurement of the branching fractions for B{sup 0{yields}}D{sub s}*{sup +{pi}-} and B{sup 0{yields}}D{sub s}*{sup -}K{sup +} decays
- Tata Institute of Fundamental Research, Mumbai (India)
- High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
- Department of Physics, University of Tokyo, Tokyo (Japan)
- Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)
We present a study of B{sup 0{yields}}D{sub s}*{sup +{pi}-} and B{sup 0{yields}}D{sub s}*{sup -}K{sup +} decays based on a sample of 657x10{sup 6} BB events collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. We measure the branching fractions to be B(B{sup 0{yields}}D{sub s}*{sup +{pi}-})=(1.75{+-}0.34(stat){+-}0.17(syst){+-}0.11(B))x10{sup -5} and B(B{sup 0{yields}}D{sub s}*{sup -}K{sup +})=(2.02{+-}0.33(stat){+-}0.18(syst){+-}0.13(B))x10{sup -5}, with significances of 6.1 and 8.0 standard deviations, respectively. The first uncertainty is statistical, the second is due to the experimental systematics, and the third is from uncertainties in the D{sub s}{sup +} decay branching fractions. From our measurements, we obtain the most precise determination so far of R{sub D*{pi},} where R{sub D*{pi}}is the ratio between amplitudes of the doubly Cabibbo-suppressed decay B{sup 0{yields}}D*{sup +{pi}-} and the Cabibbo-favored B{sup 0{yields}}D*{sup -{pi}+} decay.
- OSTI ID:
- 21409135
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevD.81.031101; (c) 2010 The American Physical Society; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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AMPLITUDES
ASYMMETRY
B NEUTRAL MESONS
BRANCHING RATIO
D S MESONS
ELECTRONS
KAONS PLUS
PARTICLE DECAY
PIONS MINUS
PIONS PLUS
POSITRONS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
B MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
KAONS
LEPTONS
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PSEUDOSCALAR MESONS
STRANGE MESONS
STRANGE PARTICLES