Search for a Low Mass Particle Decaying into {mu}{sup +}{mu}{sup -} in B{sup 0}{yields}K{sup *0}X and B{sup 0}{yields}{rho}{sup 0}X at Belle

Journal Article · Fri Aug 27 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.091801· OSTI ID:21470986

Hyun, H J; Park, H K; Kim, H O; Park, H; Kah, D H; Kim, H J; Kim, M J ^[1]; Aihara, H ^[2]; Arinstein, K; Bondar, A; Eidelman, S; Gabyshev, N; Kuzmin, A; Shwartz, B; Zhilich, V; Zyukova, O ^[3]; Aushev, T ^[4]; Bakich, A M; McOnie, S; Varvell, K E ^[5]

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1. Kyungpook National University, Taegu (Korea, Republic of)
2. Department of Physics, University of Tokyo, Tokyo (Japan)
3. Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)
4. Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
5. School of Physics, University of Sydney, NSW 2006 (Australia)

We search for dimuon decays of a low mass particle in the decays B{sup 0{yields}}K{sup *0}X and B{sup 0{yields}{rho}0}X using a data sample of 657x10{sup 6}BB events collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. We find no evidence for such a particle in the mass range from 212 MeV/c{sup 2} to 300 MeV/c{sup 2} for lifetimes below 10{sup -12} s, and set upper limits on its branching fractions. In particular, we search for a particle with a mass of 214.3 MeV/c{sup 2} reported by the HyperCP experiment, and obtain upper limits on the products B(B{sup 0}{yields}K{sup *0}X)xB(X{yields}{mu}{sup +}{mu}{sup -})<2.26(2.27)x10{sup -8} and B(B{sup 0}{yields}{rho}{sup 0}X)xB(X{yields}{mu}{sup +}{mu}{sup -})<1.73(1.73)x10{sup -8} at 90% C.L. for a scalar (vector) X particle.

• OSTI ID: 21470986
• Journal Information: Physical Review Letters, Vol. 105, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.105.091801; (c) 2010 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
BRANCHING RATIO
K*-892 MESONS
LIFETIME
MEV RANGE
MULTIPARTICLE SPECTROMETERS
MUONS MINUS
MUONS PLUS
PARTICLE DECAY
PARTICLE IDENTIFICATION
REST MASS
RHO-770 MESONS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
B MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
LEPTONS
MASS
MATTER
MEASURING INSTRUMENTS
MESONS
MUONS
PSEUDOSCALAR MESONS
SPECTROMETERS
STRANGE MESONS
STRANGE PARTICLES
VECTOR MESONS