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arXiv 1906.08950hep-ex
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II的$τ$轻子物理展望

Prospects for $τ$ Lepton Physics at Belle II

D. Rodríguez Pérez

摘要:

Belle II实验是Belle探测器的一次重大升级,将在SuperKEKB能量不对称$e^+e^-$对撞机上运行。机器的设计光度是8 $\times10^{35}$ cm $^{-2}$ s $^{-1}$,Belle II实验的目标是记录50 ab $^{-1}$的数据,比其前身多50倍。从2018年2月到7月,机器已经完成了调试运行,SuperKEKB的主要操作已经于2019年3月开始。Belle II有一个广泛的$τ$物理程序,特别是在寻找轻子味和轻子数违反(LFV和LNV),受益于$e^+e^-$碰撞中成对$τ$轻子产生的大截面。我们预计,经过5年的数据采集,Belle II将能够将LFV和LNV $τ$衰变的上限降低一个数量级。在$τ$衰变中对LFV或LNV的任何实验观察都构成了超越标准模型的物理学的明确标志,为探索潜在的新物理学提供了机会。在这次演讲中,我们将审查$τ$轻子物理程序的美女II。

英文摘要:

The Belle II experiment is a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric $e^+e^-$ collider. The design luminosity of the machine is 8$\times10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has completed a commissioning run and main operation of SuperKEKB has started in March 2019. Belle II has a broad $τ$ physics program, in particular in searches for lepton flavor and lepton number violations (LFV and LNV), benefiting from the large cross section of the pairwise $τ$ lepton production in $e^+e^-$ collisions. We expect that after 5 years of data taking, Belle II will be able to reduce the upper limits on LFV and LNV $τ$ decays by an order of magnitude. Any experimental observation of LFV or LNV in $τ$ decays constitutes an unambiguous sign of physics beyond the Standard Model, offering the opportunity to probe the underlying New Physics. In this talk we will review the $τ$ lepton physics program of Belle II.

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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