Searching for new physics in D0&rarr;&mu;+&mu;-, e+e-,&mu;&plusmn;e干 at BES and/or the super charm-tau factory

JIA Lian-Bao; ZHAO Ming-Gang; KE Hong-Wei; LI Xue-Qian

doi:10.1088/1674-1137/38/10/103101

Chinese Physics C> 2014, Vol. 38> Issue(10) : 103101 DOI: 10.1088/1674-1137/38/10/103101

Searching for new physics in D⁰→μ⁺μ^-, e⁺e^-,μ^±e^干 at BES and/or the super charm-tau factory

1.
School of Physics, Nankai University, Tianjin 300071, China
2.
School of Physics, Tianjin University, Tianjin 300072, China

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Abstract：
In contrast with B⁰-B⁰, B_s-B_s mixing where the standard model (SM) contributions overwhelm that of the new physics beyond standard model (BSM), a measured relatively large D⁰-D⁰ mixing where the SM contribution is negligible, definitely implies the existence of the new physics BSM. It is natural to consider that the rare decays of D meson might be more sensitive to new physics, and the decay mode D⁰→μ⁺μ^- could be an ideal area to search for new physics because it is a flavor changing process. In this work we look for a trace of the new physics BSM in the leptonic decays of D⁰. Concretely we discuss the contributions of unparticle or an extra gauge boson Z' while imposing the constraints set by fitting the D⁰- D⁰ mixing data. We find that the long-distance SM effects for D⁰→l1 still exceed those contributions of the BSM under consideration, but for a double-flavor changing process such as D⁰→μ^±e⁺, the new physics contribution would be significant.

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JIA Lian-Bao, ZHAO Ming-Gang, KE Hong-Wei and LI Xue-Qian. Searching for new physics in D⁰→μ⁺μ^-, e⁺e^-,μ^±e^干 at BES and/or the super charm-tau factory[J]. Chinese Physics C, 2014, 38(10): 103101. doi: 10.1088/1674-1137/38/10/103101

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Received: 2014-01-07
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沈阳化工大学材料科学与工程学院沈阳 110142

Searching for new physics in D⁰→μ⁺μ^-, e⁺e^-,μ^±e^干 at BES and/or the super charm-tau factory

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Searching for new physics in D⁰→μ⁺μ^-, e⁺e^-,μ^±e^干 at BES and/or the super charm-tau factory

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