Implications of the HyperCP Data on $B$ and $\tau$ decays

Abstract

If the HyperCP three events for the decay of ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ are explained by a new pseudoscalar (axial-vector) boson $X_{P(A)}$ with a mass of 214.3 MeV, we study the constraints on the couplings between $X_{P(A)}$ and fermions from the experimental data in $K$ and $B$ processes. Some implications of the new particle on flavor changing $B$ and $\tau$ decays are given. Explicitly, we show that the decay branching ratios of $B_s\to \varphi X_{P(A)}\to \varphi {\mu }^{+}{\mu }^{-}$, $B_d\to K_0^{\ast }(1430)P(A)\to K_0^{\ast }(1430){\mu }^{+}{\mu }^{-}$ and $\tau \to \mu X_{P(A)}\to \mu {\mu }^{+}{\mu }^{-}$ can be as large as $2.7(2.8)\times 10^{-6}$, $7.4(7.5)\times 10^{-7}$ and $1.7(0.14)\times 10^{-7}$, respectively.

12+1 pages, references added, version to appear in Phys. Lett. B

References in corpus (22)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• B_{d,s}->rho, omega, K*, phi Decay Form Factors from Light-Cone Sum Rules Revisited
• Covariant Light-Front Approach for s-wave and p-wave Mesons: Its Application to Decay Constants and Form Factors
• Master Formulae for Delta F=2 NLO-QCD Factors in the Standard Model and Beyond
• Search for Lepton Flavor Violation in the Decay tau -> mu gamma
• Search for Lepton Flavor Violation in the Decay tau -> electron gamma
• An Upper Bound on the Decay tau -> mu gamma from Belle
• Evidence for the Decay Sigma+ -> p mu+ mu-
• Nonuniversal $Z^{\prime }$ couplings in B decays
• Study of $B_{s,d}\to l^{+}{l}^{-}\gamma$ Decays
• Scalar interactions and the polarizations of $B\to \varphi K^{\ast }$
• Kaon Physics with Light Sgoldstinos and Parity Conservation
• Study of $B_s\to (\eta ,{\eta }^{\prime },\varphi )\ell \bar{\ell }$ Decays
• Implications of a new particle from the HyperCP data on Σ^+ \to p μ^+ μ^-
• On sgoldstino interpretation of HyperCP events
• On the Possibility of a New Boson X^0 (214 MeV) in Sigma^+ -> p mu^+ mu^-
• The Decay Sigma^+ -> p l^+ l^- within the Standard Model
• Search for tau -> e gamma decay at Belle
• Productions of $K_0^{\ast }(1430)$ and $K_1$ in B decays
• Constraints on the new particle in ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$
• Search for the Rare Decay B0_s -> phi mu^+ mu- with the D0 Detector

Cited by in corpus (7)

• U-boson and the HyperCP exotic events
• Flavors and Phases in Unparticle Physics
• Rare B Decays with a HyperCP Particle of Spin One
• Rare Decays with a Light CP-Odd Higgs Boson in the NMSSM
• Decay rate and asymmetries of ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$
• Sigma to p mu+ mu-: Standard Model or New Particle?
• Implication of the HyperCP boson $X^0$ (214 MeV) in the flavour changing neutral current processes