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arXiv 1003.5570hep-phhep-ex
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重介子的轻子数破坏衰变

Lepton-Number Violating Decays of Heavy Mesons

Jin-Mei Zhang, Guo-Li Wang

摘要:

轻子数破坏过程的实验观测将明确地表明中微子的马约拉纳性质。赝标介子$M_1$衰变到另一赝标介子$M_2$和两个带电轻子$\ell_1$,$\ell_2$($M_1^+\to \ell_1^+\ell_2^+M_2^-$)的各种$ΔL$ = 2过程已被广泛研究。本文在现有文献的基础上,考虑了重介子衰变为矢量介子或赝标介子的罕见过程。这些过程还没有被实验研究过,虽然它们可能有相当大的衰变率。我们计算它们的分支分数,并建议在当前和即将到来的实验中,特别是在LHCb中寻找这些衰变模式。

英文摘要:

The experimental observation of lepton-number violating processes would unambiguously indicate the Majorana nature of neutrinos. Various $ΔL$ = 2 processes for pseudoscalar meson $M_1$ decays to another pseudoscalar meson $M_2$ and two charged leptons $\ell_1$, $\ell_2$ ($M_1^+\to \ell_1^+\ell_2^+M_2^-$) have been studied extensively. Extending the existing literature on the studies of these kinds of processes, we consider the rare decays of heavy mesons to a vector meson or a pseudoscalar meson. These processes have not been searched for experimentally, while they may have sizable decay rates. We calculate their branching fractions and propose to search for these decay modes in the current and forthcoming experiments, in particular at the LHCb.

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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