| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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The Decay Rate of J/ψ to Λc+øverlineΣ+ in and beyond the Standard Model |
| KE Hong-Wei1**, CHEN Ya-Zheng2, LI Xue-Qian2
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1 School of Science, Tianjin University, Tianjin 300072
2 School of Physics, Nankai University, Tianjin 300071
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| Cite this article: |
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KE Hong-Wei, CHEN Ya-Zheng, LI Xue-Qian 2011 Chin. Phys. Lett. 28 071301 |
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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.
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| Keywords:
13.20.Gd
12.39.Jh
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Received: 18 March 2011
Published: 29 June 2011
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| PACS: |
13.20.Gd
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(Decays of J/ψ, Υ, and other quarkonia)
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12.39.Jh
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(Nonrelativistic quark model)
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