Measurement of the decay B{sup 0}{yields}{pi}{sup -}l{sup +}{nu} and determination of |V{sub ub}|

Journal Article · Fri Apr 01 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.071101· OSTI ID:21537682

Ha, H; Won, E; Ko, B R; Lee, S -H ^[1]; Adachi, I; Haba, J; Itoh, R; Iwasaki, Y; Nakao, M; Nishida, S; Nozaki, T; Sakai, Y; Trabelsi, K; Uehara, S; Uno, S ^[2]; Aihara, H ^[3]; Aziz, T; Joshi, N J; Mohanty, G B ^[4]; Bakich, A M ^[5]

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1. Korea University, Seoul (Korea, Republic of)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
3. Department of Physics, University of Tokyo, Tokyo (Japan)
4. Tata Institute of Fundamental Research, Mumbai (India)
5. School of Physics, University of Sydney, NSW 2006 (Australia)

We present a measurement of the charmless semileptonic decay B{sup 0}{yields}{pi}{sup -}l{sup +}{nu} using a data sample containing 657x10{sup 6} BB events collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider operating near the {Upsilon}(4S) resonance. We determine the total branching fraction of the decay, B(B{sup 0}{yields}{pi}{sup -}l{sup +}{nu})=(1.49{+-}0.04(stat){+-}0.07(syst))x10{sup -4}. We also report a new precise measurement of the differential decay rate and extract the Cabibbo-Kobayashi-Maskawa matrix element |V{sub ub}| using model-independent and model-dependent approaches. From a simultaneous fit to the measured differential decay rate and lattice QCD results, we obtain |V{sub ub}|=(3.43{+-}0.33)x10{sup -3}, where the error includes both experimental and theoretical uncertainties.

• OSTI ID: 21537682
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ASYMMETRY
B MESONS
B NEUTRAL MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BEIJING ELECTRON-POSITRON COLLIDER
BOSONS
BRANCHING RATIO
DATA COVARIANCES
DECAY
DIMENSIONLESS NUMBERS
ELECTRONS
ELEMENTARY PARTICLES
ERRORS
FERMIONS
FIELD THEORIES
HADRONS
KEK LINAC
KOBAYASHI-MASKAWA MATRIX
LEPTONS
LINEAR ACCELERATORS
MATRICES
MATTER
MESONS
PARTICLE DECAY
POSITRONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RESONANCE
SEMILEPTONIC DECAY
STORAGE RINGS
VECTOR MESONS
WEAK PARTICLE DECAY