Probing chirality structure in lepton-flavour-violating Higgs decay $h\to\tau\mu$ at the LHC
| Autor: | Aoki, Mayumi, Kanemura, Shinya, Takeuchi, Michihisa, Zamakhsyari, Lalu |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 107 (2023), 055037 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.107.055037 |
| Popis: | A phenomenological study for determining the chirality structure in lepton-flavor-violating Higgs (hLFV) decays $h \to \tau\mu$ at the LHC is presented. We estimate the effects of the $\tau$ polarization in the analysis andthe importance of determining the relative visible momentum ratio $x$, and show the analysis with a collinear mass $m_{col1}$ by assuming one missing particle is appropriate. We find that the sensitivity would be generically affected up to $\pm$ $4-6$~\% in terms of the BR$(h\to \tau\mu)$ upper bound, and show the altered bounds on the $(|y_{\mu\tau}|, |y_{\tau\mu}|)$ plane. We further study the benchmark scenarios, and demonstrate the sensitivity study for the chirality structure using the relative visible momentum ratio. We find that the two fully polarized cases, the $\tau_R$ and $\tau_L$ scenarios consistent with the recently reported excess, are distinguishable at 2$\sigma$ level for 1000~fb$^{-1}$. We also show that a further improved study potentially provides a similar sensitivity already for 139~fb$^{-1}$. Comment: Published in Phys. Rev. D 107, 055037, 27 pages, 8 figures and 5 tables |
| Databáze: | arXiv |
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