Search for lepton-flavour-violating decays of the Higgs and Z bosons with the ATLAS detector

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• 作者：G. Aad ; B. Abbott ; J. Abdallah ; O. Abdinov ; B. Abeloos&#8230
• 刊名：The European Physical Journal C
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：77
• 期：2
• 全文大小：3108KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Elementary Particles, Quantum Field Theory; Nuclear Physics, Heavy Ions, Hadrons; Quantum Field Theories, String Theory; Measurement Science and Instrumentation; Astronomy, Astrophysics and Cosmology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1434-6052
• 卷排序：77

文摘

Direct searches for lepton flavour violation in decays of the Higgs and Z bosons with the ATLAS detector at the LHC are presented. The following three decays are considered: \(H\rightarrow e\tau \), \(H\rightarrow \mu \tau \), and \(Z\rightarrow \mu \tau \). The searches are based on the data sample of proton–proton collisions collected by the ATLAS detector corresponding to an integrated luminosity of 20.3 \(\mathrm{fb}^{-1}\) at a centre-of-mass energy of \(\sqrt{s}=8\) TeV. No significant excess is observed, and upper limits on the lepton-flavour-violating branching ratios are set at the 95\(\%\) confidence level: Br\((H\rightarrow e\tau )<1.04\%\), Br\((H\rightarrow \mu \tau )<1.43\%\), and Br\((Z\rightarrow \mu \tau )<1.69\times 10^{-5}\).