Published March 1, 2011 | Version v1
Journal article Metadata-only

Measurements of branching fractions, polarizations, and direct CP-violation asymmetries in B+→ρ0K*+ and B+→f0(980)K*+ decays

Creators

  • 1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
  • 2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
  • 3. Dipartimento di Fisica, Universita di Bari, I-70126 Bari (Italy)
  • 4. INFN Sezione di Bari, I-70126 Bari (Italy)
  • 5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
  • 6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
  • 7. Ruhr Universitaet Bochum, Institut fuer Experimentalphysik 1, D-44780 Bochum (Germany)

Description

We present measurements of the branching fractions, longitudinal polarization, and direct CP-violation asymmetries for the decays B+→ρ0K*+ and B+→f0(980)K*+ with a sample of (467±5)x106BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at the SLAC National Accelerator Laboratory. We observe B+→ρ0K*+ with a significance of 5.3σ and measure the branching fraction B(B+→ρ0K*+)=(4.6±1.0±0.4)x10-6, the longitudinal polarization fL=0.78±0.12±0.03, and the CP-violation asymmetry ACP=0.31±0.13±0.03. We observe B+→f0(980)K*+ and measure the branching fraction B(B+→f0(980)K*+)xB(f0(980)→π+π-)=(4.2±0.6±0.3)x10-6 and the CP-violation asymmetry ACP=-0.15±0.12±0.03. The first uncertainty quoted is statistical and the second is systematic.

Additional details

Identifiers

DOI
10.1103/PhysRevD.83.051101;
arXiv
arXiv:1012.4044v1;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
83
Journal Issue
5
Journal Page Range
p. 051101-051101.8
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43055876
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ASYMMETRY; BRANCHING RATIO; CP INVARIANCE; ELECTRONS; F0-980 MESONS; FERMILAB ACCELERATOR; KAONS MINUS; PARTICLE DECAY; PIONS MINUS; POLARIZATION; POSITRONS; STANFORD LINEAR ACCELERATOR CENTER
Descriptors DEC
ACCELERATORS; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BOSONS; CYCLIC ACCELERATORS; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INVARIANCE PRINCIPLES; KAONS; LEPTONS; MATTER; MESONS; NATIONAL ORGANIZATIONS; PIONS; PSEUDOSCALAR MESONS; SCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES; SYNCHROTRONS; US DOE; US ERDA; US ORGANIZATIONS

Optional Information

Notes
(c) 2011 American Institute of Physics
Collaborations
BABAR Collaboration