Rare B Decays with a HyperCP Particle of Spin One

Abstract

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.

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

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Cited by in corpus (11)

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• New light mediators for the $R_K$ and $R_{K^{\ast }}$ puzzles
• Experiments with K-Meson Decays
• Search for a Low Mass Particle Decaying into mu^+ mu^- in B0-> K*0 X and B0-> rho0 X at Belle
• Anomalous CP-Violation in B_s-Bbar_s Mixing Due to a Light Spin-One Particle
• Constraints on a New Light Spin-One Particle from Rare b -> s Transitions
• Constraining Nonstandard Neutrino-Electron Interactions due to a New Light Spin-1 Boson
• Search for the Rare Decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-
• Decay rate and asymmetries of ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$
• $(g-2{)}_{\mu }$ Versus $K\to \pi +E_{miss}$ Induced by the $(B-L{)}_{23}$ Boson