Measurements of branching fractions for B{sup 0}{yields}D{sub s}{sup +}{pi}{sup -} and B{sup 0}{yields}D{sub s}{sup +}K{sup -}

Journal Article · Wed Sep 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.051103· OSTI ID:21432933

Das, A; Aziz, T; Mohanty, G B; Joshi, N J ^[1]; Trabelsi, K; Adachi, I; Itoh, R; Iwasaki, Y; Kichimi, H; Krokovny, P; MacNaughton, J; Nakao, M; Nishida, S; Sakai, Y; Uehara, S; Uno, S; Yamauchi, M ^[2]; Aihara, H ^[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 improved measurements of the branching fractions for the decays B{sup 0}{yields}D{sub s}{sup +}{pi}{sup -} and B{sup 0}{yields}D{sub s}{sup +}K{sup -} using a data sample of 657x10{sup 6} BB events collected at the {Upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. The results are B(B{sup 0}{yields}D{sub s}{sup +}{pi}{sup -})=(1.99{+-}0.26{+-}0.18)x10{sup -5} and B(B{sup 0}{yields}D{sub s}{sup +}K{sup -})=(1.91{+-}0.24{+-}0.17)x10{sup -5}, where the uncertainties are statistical and systematic, respectively. Based on these results, we determine the ratio between amplitudes of the doubly Cabibbo suppressed decay B{sup 0}{yields}D{sup +}{pi}{sup -} and the Cabibbo favored decay B{sup 0}{yields}D{sup -}{pi}{sup +}, R{sub D}{pi}=[1.71{+-}0.11(stat){+-}0.09(syst){+-}0.02(theo)]%, where the last term denotes the theory error.

• OSTI ID: 21432933
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ASYMMETRY
B MESONS
B NEUTRAL MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
BRANCHING RATIO
CHARM PARTICLES
CHARMED MESONS
COLLISIONS
D S MESONS
DECAY
DIMENSIONLESS NUMBERS
ELECTRON COLLISIONS
ELECTRON-POSITRON COLLISIONS
ELEMENTARY PARTICLES
HADRONS
KAONS
KAONS MINUS
KEK LINAC
LINEAR ACCELERATORS
MESONS
PARTICLE DECAY
PIONS
PIONS MINUS
PIONS PLUS
POSITRON COLLISIONS
PSEUDOSCALAR MESONS
RESONANCE
STRANGE MESONS
STRANGE PARTICLES
VECTOR MESONS