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arXiv 1302.1504hep-ph
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四体B和D衰变中的束缚共振Majorana中微子

Bounding resonant Majorana neutrinos from four-body B and D decays

Gabriel Lopez Castro, Nestor Quintero

摘要:

不同过程中轻子数破缺的计算对于约束Majorana中微子的参数空间是非常有用的。在这里,我们利用B^-> D^0 π ^+ μ ^-μ ^-和D^0 ->(π ^-π ^-/K^-π ^-)μ ^-μ ^-衰变的分支分数的上界,通过假设马约拉纳中微子在这些四体衰变中共振产生,推导出对它们的质量和混合的约束。虽然从B^-衰变得到的排除区与三体D^-和B^-衰变的现有限制是竞争性的,但这表明对D^0衰变的实验改进提供了很好的潜力来提供类似的结果。

英文摘要:

Searches of lepton-number violation in different processes are very useful to constrain the parameter space of Majorana neutrinos. Here we use available upper bounds on the branching fractions of B^- -> D^0pi^+mu^-mu^- and D^0 -> (pi^-pi^-/K^-pi^-) mu^-mu^- decays to derive constraints on the mass and mixings of Majorana neutrinos by assuming they are produced resonantly in these four-body decays. While the excluded region obtained from B^- decays are competitive with existing limits from three-body D^- and B^- decays, it is shown that experimental improvements on D^0 decays offer a good potential to provide similar results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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