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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1302.5992hep-phhep-ex
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双Higgs偶态模型中的B -> D(*)Tau Nu衰变

B -> D(*) Tau Nu decays in two-Higgs-doublet models

Alejandro Celis, Martin Jung, Xin-Qiang Li, Antonio Pich

摘要:

BaBar合作组最近报道了相对于SM期望的相当大的过量,衰变率B -> D(*)Tau Nu,由相应的轻轻子模式归一化。这种过量所暗示的轻子味普适性的违反可能是由于带电的希格斯粒子在树水平上介导了这些过程。在这次演讲中,我们分析了在两希格斯双重模型的框架内观察到的过剩的影响,也考虑了B和D(s)介子的其他半轻子和轻子衰变的边界。最后讨论了B -> D(*)Tau Nu衰变在未来超级香料工厂中的前景。

英文摘要:

A sizable excess with respect to the SM expectation has been reported recently by the BaBar collaboration in the decay rates B -> D(*) Tau Nu, normalized by the corresponding light lepton modes. A violation of lepton flavor universality as suggested by this excess could be due to a charged Higgs mediating these processes at tree level. In this talk we analyze the implications of the observed excess within the framework of two-Higgs-doublet models, considering also the bounds from other semileptonic and leptonic decays of B and D(s) mesons. Prospects for B -> D(*) Tau Nu decays at future Super-Flavor Factories are also discussed.

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