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

Journal Article · Mon Feb 01 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.031101· OSTI ID:21409135

Joshi, N J; Aziz, T; Das, A ^[1]; Trabelsi, K; Adachi, I; Haba, J; Hazumi, M; Itoh, R; Iwasaki, Y; Krokovny, P; Nakao, M; Nishida, S; Sakai, Y; Uehara, S; Uno, S; Yamauchi, M ^[2]; Aihara, H; Iwasaki, M ^[3]; Arinstein, K; Aulchenko, V ^[4]

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1. Tata Institute of Fundamental Research, Mumbai (India)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
3. Department of Physics, University of Tokyo, Tokyo (Japan)
4. 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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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ASYMMETRY
B MESONS
B NEUTRAL MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
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CHARM PARTICLES
CHARMED MESONS
D S MESONS
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KAONS PLUS
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