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arXiv 2003.06948hep-ph
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短程相互作用主导的无中微子双衰变的结果

Consequences of Neutrinoless Double Decays Dominated by Short Range Interactions

C. Q. Geng, J. N. Ng

摘要:

研究了短程相互作用主导核的无中微子双β衰变的一些结果。为了说明我们的结果,我们假设,这样的衰变主要是通过短程相互作用,涉及两个W玻色子的交流,并限制自己只包括新的标量没有新的规范相互作用的SM费米子。对于中微子的质量问题,我们建议解决它,采用积极的轻中微子主要是狄拉克质量和小马约拉纳质量引起的新标量使它们成为伪(准)-狄拉克粒子。中微子的这一特殊方面可能在下一代中微子振荡实验和/或中微子望远镜中被探测到。如果是这样的话,这就为无中微子双β衰变和中微子物理学之间开辟了新的联系。我们还注意到了新的物理信号,如高电荷标量态,可以在强子对撞机中探索。特别是,我们发现高能e^- e^-对撞机在检验轻子数破坏的起源方面将是非常有用的,它补充了无中微子双衰变的研究。

英文摘要:

We investigate some consequences if neutrinoless double beta decays of nuclei are dominated by short range interactions. To illustrate our results, we assume that such decays proceed mainly through short range interactions involving two-W-bosons exchanges and confine ourselves to only include new scalars without new gauge interactions for SM fermions. For the neutrino mass problem we propose to solve it by adopting that the active light neutrinos have predominantly Dirac masses and the small Majorana masses induced by the new scalars render them pseudo(quasi)-Dirac particles. This particular aspect of neutrinos may be detectable in the next generation of neutrino oscillation experiments and/or neutrino telescopes. If so this opens a new connection between neutrinoless double beta decays and neutrino physics. We also noted the new physics signals such as high charged scalar states that can be explored in hadron colliders. In particular, we find that a high energy e^- e^- collider will be very useful in testing the origin of lepton number violation which complements neutrinoless double decays studies.

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