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arXiv 2407.13620hep-ph
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关于包含3个右手中微子的I型跷跷板模型的对撞机可检验性

On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos

Marco Drewes, Yannis Georis, Juraj Klarić, Antony Wendels

AI总结:

本文在标准模型的三右手中微子扩展框架下,研究了通过测量重中性轻子衰变分支比并结合振荡数据来确定模型参数的能力,论证了未来对撞机及固定靶实验在发现重中性轻子并检验其物理机制方面的潜力。

摘要:

如果在基于加速器的实验中发现任何重中性轻子,关键问题将涉及它们与中微子质量或轻子生成之间的可能联系。在标准模型的三右手中微子可重正化扩展模型中,我们探讨了通过测量重中性轻子衰变为各个SM(标准模型)代的分支比,可以获得多少关于基本模型参数的信息。我们发现,如果这些分支比能够以任意精度测量,并假设运动学上可区分的右手中微子,那么在补充轻中微子振荡数据后,它们足以确定模型的所有18个参数。当考虑与未来轻子对撞机(如FCC-ee或CEPC)在几十GeV质量范围内可达到的有限统计不确定性相当时,一些参数简并性仍然存在,但测量仍将为模型提供强有力的一致性检验。在亚GeV范围内,SHiP以及潜在的DUNE有望对单个模型参数表现出良好的灵敏度。这表明这些实验不仅有望发现重中性轻子,还将在理解其在粒子物理学和宇宙学中的作用方面发挥重要作用。

英文摘要:

If any heavy neutral leptons are discovered in accelerator-based experiments, key questions will involve their possible connection to neutrino masses or leptogenesis. Working in a renormalisable extension of the Standard Model by three right-handed neutrinos, we address the question of how much information about the fundamental model parameters can be obtained by measuring the branching ratios in the decays of the heavy neutral leptons into individual SM generations. We find that, provided that these branching ratios could be measured with arbitrary precision and assuming kinematically distinguishable right-handed neutrinos, they can be sufficient to pin down all 18 parameters of the model when supplemented with light neutrino oscillation data. When considering a finite statistical uncertainty comparable to that which can be achieved by future lepton colliders like FCC-ee or CEPC in the mass range of tens of GeV, some parameter degeneracies remain, but measurements would still provide powerful consistency checks of the model. In the sub-GeV range a good sensitivity to individual model parameters can be expected for SHiP and potentially for DUNE. This shows the potential of these experiments to not only discover heavy neutral leptons, but play an important role in understanding their role in particle physics and cosmology.

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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