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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 544691.0, MPI für Physik / MPI für Physik
Search for a Low Mass Particle Decaying into mu^+ mu^- in B0-> K*0 X and B0-> rho0 X at Belle
Authors:Hyun, H. J.; Park, H. K.; Kim, H. O.; Park, H.; et al.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys.Rev.Lett.
Issue / Number:105
Start Page:091801
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We search for dimuon decays of a low mass particle in the decays B0->K*0 X and B0->rho X using a data sample of 657x10^6 B Bbar events collected with the Belle detector at the KEKB asymmetric-energy e^+ e^- collider. We find no evidence for such a particle in the mass range from 212 MeV/c2 to 300 MeV/c2, and set upper limits on its branching fractions. In particular, we search for a particle with a mass of 214.3 MeV/c2 reported by the HyperCP experiment, and obtain upper limits on the products B(B0->K*0 X)xB(X->mu^+ mu^-) < 2.26 (2.27)x10^-8 and B(B0->rho0 X)xB(X->mu^+ mu^-) < 1.73 (1.73)x10^-8 at 90% C.L. for a scalar (vector) X particle.
Classification / Thesaurus:Belle II
Comment of the Author/Creator:5 pages, 2 figures; submitted to Phys. Rev. Lett.
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2010-212
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/arxiv:1005.1450
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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