The decay rate of J/$ψ$ to $Λ_c+\bar{Σ^+}$ in SM and beyond

Details The decay rate of J/$ψ$ to $Λ_c+\bar{Σ^+}$ in SM and beyond The decay rate of J/$ψ$ to $Λ_c+\bar{Σ^+}$ in SM and beyond

2011-02-28

arxiv.org/abs/1102.5648v1

Chin. Phys. Lett. 28, 071301, 2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 figures

Scientific paper

With rapid growth of the database of the BES III and the proposed super flavor factory, measurement on the rare $J/\psi$ decays may be feasible, especially the weak decays into baryon final states. In this work we study the decay rate of J/$\psi$ to $\Lambda_c+\bar{\Sigma^+}$ in the SM and physics beyond the SM (here we use the unparticle model as an example). The QPC model is employed to describe the creation of a pair of $q\bar q$ from vacuum. We find that the rate of $J/\psi\to \Lambda_c+\bar{\Sigma^+}$ is at order of $10^{-10}$ in the SM, whereas the contribution of the unparticle is too small to be substantial. Therefore if a large branching ratio is observed, it must be due to new physics beyond SM, but by no means the unparticle.

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