On the possibility of a new boson X 0 ( 214 MeV ) in Σ + <mml:mo…
2005; Elsevier BV; Volume: 632; Issue: 2-3 Linguagem: Inglês
10.1016/j.physletb.2005.10.050
ISSN1873-2445
AutoresN. G. Deshpande, G. Eilam, J. Jiang,
Tópico(s)High-Energy Particle Collisions Research
ResumoWe consider the existence of the state X0(214MeV) in Σ+→pμ+μ− decay found by the HyperCP Collaboration. We assume that a fundamental spin zero boson X0 coupled to quarks leads to flavor changing s→dX0 process. We estimate the scalar and pseudoscalar coupling constants by considering Σ+→pX0 and K+→π+X0 processes, and find that pseudoscalar coupling dominates. We then evaluate the branching ratios for KL→π0π0X0, π+π−X0 and Ω−→Ξ−X0 decays. All these rates are found to be in the measurable ranges. We also comment on X0 coupling to muons and constraints from muon g−2.
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