Observation of B{sup -}{yields}p{Lambda}D{sup 0} at Belle

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

DOI:https://doi.org/10.1103/PHYSREVD.84.071501· OSTI ID:21607737

Chen, P; Wang, M -Z; Chang, P; Chao, Y; Hou, W -S; Hsiung, Y B; Liu, Y; Shiu, J -G ^[1]; Adachi, I; Haba, J; Hara, T; Itoh, R; Iwasaki, Y; Katayama, N; Kichimi, H; Nakao, M; Nishida, S; Sakai, Y; Uehara, S; Uno, S ^[2]

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1. Department of Physics, National Taiwan University, Taipei (China)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

We study B{sup -} meson decays to p{Lambda}D{sup (*)0} final states using a 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 observed branching fraction for B{sup -}{yields}p{Lambda}D{sup 0} is (1.43{sub -0.25}{sup +0.28}{+-}0.18)x10{sup -5} with a significance of 8.1 standard deviations, where the uncertainties are statistical and systematic, respectively. Most of the signal events have the p{Lambda} mass peaking near threshold. No significant signal is observed for B{sup -}{yields}p{Lambda}D{sup *0} and the corresponding upper limit on the branching fraction is 4.8x10{sup -5} at the 90% confidence level.

• OSTI ID: 21607737
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 84; 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 MINUS MESONS
BARYONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
BRANCHING RATIO
CHARM PARTICLES
CHARMED MESONS
D MESONS
D NEUTRAL MESONS
DECAY
DIMENSIONLESS NUMBERS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HYPERONS
KEK LINAC
LAMBDA BARYONS
LEPTONS
LINEAR ACCELERATORS
MASS
MATTER
MESONS
NUCLEONS
PARTICLE DECAY
POSITRONS
PROTONS
PSEUDOSCALAR MESONS
RESONANCE
STRANGE PARTICLES
VECTOR MESONS