高能cLFV在$\mu$TRISTAN：标准模型的重中性轻子扩展
High-energy cLFV at $μ$TRISTAN: HNL extensions of the Standard Model
AI总结：
本文在标准模型HNL扩展框架下计算μTRISTAN对撞机中带电轻子味破坏过程的截面与角观测量，评估其发现潜力，并显示eτ和μτ通道灵敏度远超低能探针及FCC-ee。
摘要：
在标准模型的重中性轻子（HNL）扩展背景下，我们计算了$\mu^+ e^-\to \ell_\alpha^+\ell_\beta^-$散射的截面以及若干角观测量。特别地，我们研究了$\mu$TRISTAN对撞机在未来发现此类带电轻子味破坏过程的灵敏度，以及这些搜索对HNL模型参数空间的潜在约束能力。我们的结果表明，虽然低能$\mu-e$味破坏探针提供了最有前景的潜力，但$\mu$TRISTAN上$e\tau$和$\mu\tau$味破坏搜索的前景可以比相关低能探针（以及FCC-ee上的味破坏$Z$极点过程）高出几个数量级。
英文摘要：
Within the context of heavy neutral lepton (HNL) extensions of the Standard Model, we compute the cross-sections for $μ^+ e^-\to \ell_α^+\ell_β^-$ scattering, as well as several angular observables. In particular, we investigate the future sensitivity of a $μ$TRISTAN collider in discovering such charged lepton flavour violating processes and the potential constraining power of these searches on the parameter space of HNL models. Our results show that while low-energy probes of $μ-e$ flavour violation do offer the most promising potential, the prospects for $eτ$ and $μτ$ flavour violation searches at $μ$TRISTAN can exceed those of related low-energy probes (as well as flavour violating $Z$-pole processes at FCC-ee) by several orders of magnitude.
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