Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions UPSILON->gammaA{sup 0}
- Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
- Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
- INFN Sezione di Bari, I-70126 Bari (Italy)
- University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
- Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
We search for evidence of a light scalar boson in the radiative decays of the UPSILON(2S) and UPSILON(3S) resonances: UPSILON(2S,3S)->gammaA{sup 0}, A{sup 0}->mu{sup +}mu{sup -}. Such a particle appears in extensions of the standard model, where a light CP-odd Higgs boson naturally couples strongly to b quarks. We find no evidence for such processes in the mass range 0.212<=m{sub A}{sup 0}<=9.3 GeV in the samples of 99x10{sup 6} UPSILON(2S) and 122x10{sup 6} UPSILON(3S) decays collected by the BABAR detector at the SLAC PEP-II B factory and set stringent upper limits on the effective coupling of the b quark to the A{sup 0}. We also limit the dimuon branching fraction of the eta{sub b} meson: B(eta{sub b}->mu{sup +}mu{sup -})<0.9% at 90% confidence level.
- OSTI ID:
- 21364616
- Journal Information:
- Physical Review Letters, Vol. 103, Issue 8; Other Information: DOI: 10.1103/PhysRevLett.103.081803; (c) 2009 The American Physical Society; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
B QUARKS
BRANCHING RATIO
GEV RANGE 01-10
HIGGS BOSONS
MESON FACTORIES
MESONS
MUONS MINUS
MUONS PLUS
PAIR PRODUCTION
RADIATIVE DECAY
STANDARD MODEL
STANFORD LINEAR ACCELERATOR CENTER
ACCELERATORS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BEAUTY PARTICLES
BOSONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
GEV RANGE
GRAND UNIFIED THEORY
HADRONS
INTERACTIONS
LEPTONS
MATHEMATICAL MODELS
MATTER
MUONS
NATIONAL ORGANIZATIONS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARKS
UNIFIED GAUGE MODELS
US DOE
US ERDA
US ORGANIZATIONS