摘要ã With rapid growth of the database of the BES III and the proposed super flavor factory, measurement of the rare J/ψ decays may be feasible, especially the weak decays into baryon final states. In this work, we study the decay rate of J/ψ to Λc+øverline Σ+
in the standard model (SM) and physics beyond the SM (here we use the unparticle model as an example). The quark−pair-creation model is employed to describe the creation of a pair of qq from a vacuum. We find that the rate of J/ψ→Λc+Σ+ is of the 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 the SM, but by no means the unparticle.
Abstract：ã With rapid growth of the database of the BES III and the proposed super flavor factory, measurement of the rare J/ψ decays may be feasible, especially the weak decays into baryon final states. In this work, we study the decay rate of J/ψ to Λc+øverline Σ+
in the standard model (SM) and physics beyond the SM (here we use the unparticle model as an example). The quark−pair-creation model is employed to describe the creation of a pair of qq from a vacuum. We find that the rate of J/ψ→Λc+Σ+ is of the 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 the SM, but by no means the unparticle.
KE Hong-Wei**;CHEN Ya-Zheng;LI Xue-Qian
. The Decay Rate of J/ψ to Λc+øverlineΣ+ in and beyond the Standard Model[J]. 中国物理快报, 2011, 28(7): 71301-071301.
KE Hong-Wei**, CHEN Ya-Zheng, LI Xue-Qian
. The Decay Rate of J/ψ to Λc+øverlineΣ+ in and beyond the Standard Model. Chin. Phys. Lett., 2011, 28(7): 71301-071301.
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