Rare B Decays with a HyperCP Particle of Spin One

Details Rare B Decays with a HyperCP Particle of Spin One Rare B Decays with a HyperCP Particle of Spin One

2009-10-15

arxiv.org/abs/0910.2969v2

JHEP 1001:022,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 3 figures; discussion on spin-0 case modified, few errors corrected, main conclusions unchanged

Scientific paper

10.1007/JHEP01(2010)022

In light of recent experimental information from the CLEO, BaBar, KTeV, and Belle collaborations, we investigate some consequences of the possibility that a light spin-one particle is responsible for the three Sigma^+ -> p mu^+ mu^- events observed by the HyperCP experiment. In particular, allowing the new particle to have both vector and axial-vector couplings to ordinary fermions, we systematically study its contributions to various processes involving b-flavored mesons, including B-Bbar mixing as well as leptonic, inclusive, and exclusive B decays. Using the latest experimental data, we extract bounds on its couplings and subsequently estimate upper limits for the branching ratios of a number of B decays with the new particle. This can serve to guide experimental searches for the particle in order to help confirm or refute its existence.

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