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arXiv 1303.0899hep-phhep-exnucl-th
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LHC的无中子双β衰变和轻子数破坏

Neutrinoless double beta decay and lepton number violation at the LHC

J. C. Helo, M. Hirsch, S. G. Kovalenko, H. Pas

摘要:

我们比较了LHC对轻子数破坏(LNV)信号的发现潜力与当前和未来双β衰变实验的灵敏度,假设0νββ衰变主要是重粒子交换。我们考虑了0νββ衰变的带电标量、轻夸克和双夸克机制,涵盖了具有最小和最大可能速率的0νββ衰变算符。我们证明,如果发现0νββ衰变的半衰期低于$10^{26}-10^{27}$ ys,则在LHC上应该出现正信号,除了一些特定的细夸克机制的情况,反之亦然,如果LHC没有发现LNV的任何线索,则在大多数情况下,对有限的0νββ衰变半衰期的“短程”解释将被排除。我们认为,如果在LHC中发现了正LNV信号,则有可能识别对0νββ的主导贡献。讨论了两种不同的可观测量:不同的不变质量峰和电荷不对称性。

英文摘要:

We compare the discovery potential of the LHC for lepton number violating (LNV) signals with the sensitivity of current and future double beta decay experiments, assuming 0νββdecay is dominated by heavy particle exchange. We consider charged scalar, leptoquark and diquark mechanisms of 0νββ-decay, covering the 0νββ-decay operators with both, the smallest and largest, possible rates. We demonstrate, if 0νββ-decay were found with a half-life below $10^{26}-10^{27}$ ys a positive signal should show up at the LHC, except for some particular cases of the leptoquark mechanism, and vice versa, if the LHC does not find any hints for LNV, a "short-range" explanation for a finite 0νββ-decay half-life will be ruled out in most cases. We argue, if a positive LNV signal were found at the LHC, it is possible to identify the dominant contribution to 0νββ. Two different kinds of observables which could provide such "model discriminating" power are discussed: Different invariant mass peaks and the charge asymmetry.

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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