On the Possibility of a New Boson X^0 (214 MeV) in Sigma^+ -> p mu^+ mu^-

Abstract

We consider the existence of the state X^0 (214 MeV) in Sigma^+ -> p mu^+ mu^- decay found by the HyperCP collaboration. We assume that a fundamental spin zero boson X^0 coupled to quarks leads to flavor changing s -> d X^0 process. We estimate the scalar and pseudoscalar coupling constants by considering Sigma^+ -> p X^0 and K^+ -> pi^+ X^0 processes, and find that pseudoscalar coupling dominates. We then evaluate the branching ratios for K_L -> pi^0 pi^0 X^0, pi^+ pi^- X^0 and Omega^- -> Xi^- X^0 decays. All these rates are found to be in the measurable ranges. We also comment on X^0 coupling to muons and constraints from muon g-2.

6 pages; typos corrected, references added, 7 pages

References in corpus (6)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• A new measurement of K+(e4) decay and the s-wave pi-pi-scattering length a00
• Evidence for the Decay Sigma+ -> p mu+ mu-
• Light Sgoldstino: Precision Measurements versus Collider Searches
• Kaon Physics with Light Sgoldstinos and Parity Conservation
• On the muon anomalous magnetic moment in models with a superlight gravitino

Cited by in corpus (29)

• Secluded U(1) below the weak scale
• Non-relativistic effective theory of dark matter direct detection
• Implications of LHCb measurements and future prospects
• A taste of dark matter: Flavour constraints on pseudoscalar mediators
• A New Flavor of Searches for Axion-Like Particles
• Investigating electron interacting dark matter
• Momentum Dependent Dark Matter Scattering
• Has HyperCP Observed a Light Higgs Boson?
• Dark Higgs Bosons at Colliders
• On sgoldstino interpretation of HyperCP events
• Evidence for the rare decay ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$
• Radiative quarkonium decays and the NMSSM Higgs interpretation of the HyperCP Sigma+ --> p mu+mu- events
• Light Higgs Production in Hyperon Decay
• More about sgoldstino interpretation of HyperCP events
• U-boson and the HyperCP exotic events
• Rare decay ${\pi }^0\to e^{+}{e}^{-}$ constraints on the light CP-odd Higgs in NMSSM
• Contributions from SUSY-FCNC couplings to the interpretation of the HyperCP events for the decay Σ^+ \to p μ^+ μ^-
• Rare B Decays with a HyperCP Particle of Spin One
• Rare Decays with a Light CP-Odd Higgs Boson in the NMSSM
• Is light thermal scalar dark matter possible?
• Search for the Rare Decays KL->pi0pi0mu+mu- and KL->pi0pi0X0->pi0pi0mu+mu-
• Implications of the HyperCP Data on $B$ and $\tau$ decays
• Search for Low Mass Exotic mesonic structures. Part I: experimental results
• A New Experiment to Study Hyperon CP Violation and the Charmonium System
• Sigma to p mu+ mu-: Standard Model or New Particle?
• Prospects for Antiproton Experiments at Fermilab
• Observation of the very rare ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ decay
• Implication of the HyperCP boson $X^0$ (214 MeV) in the flavour changing neutral current processes
• Testing the HyperCP anomaly at LHCb: evidence for the ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ decay