Published November 19, 2004 | Version v1
Journal article Metadata-only

Observation of B+→ΛΛ-bar K+

Creators

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

Description

We report the first observation of the charmless hyperonic B decay, B+→ΛΛ-barK+, using a 140 fb-1 data sample recorded at the Υ(4S) resonance with the Belle detector at the KEKB e+e- collider. The measured branching fraction is B(B+→ΛΛ-barK+)=(2.91-0.70+0.90±0.38)x10-6. We also perform a search for the related decay mode B+→ΛΛ-barπ+, but do not find a significant signal. We set a 90% confidence-level upper limit of B(B+→ΛΛ-barπ+)<2.8x10-6

Additional details

Identifiers

DOI
10.1103/PhysRevLett.93.211801;
arXiv
arXiv:hep-ex/0406068v2;

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
93
Journal Issue
21
Journal Page Range
p. 211801-211801.5
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36062860
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ANTILAMBDA PARTICLES; B PLUS MESONS; BRANCHING RATIO; HADRONIC PARTICLE DECAY; HYPERONS; KAONS PLUS; LAMBDA PARTICLES; PARTICLE PRODUCTION; PIONS PLUS; RESONANCE; SIGNALS
Descriptors DEC
ANTIBARYONS; ANTIHYPERONS; ANTIMATTER; ANTIPARTICLES; B MESONS; BARYONS; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; DECAY; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HYPERONS; KAONS; LAMBDA BARYONS; LAMBDA PARTICLES; MATTER; MESONS; PARTICLE DECAY; PIONS; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES

Optional Information

Notes
(c) 2004 The American Physical Society
Collaborations
Belle Collaboration