Quark flavour-violating Higgs decays at the ILC
| Autor: | Barducci, Daniele, Helmboldt, Alexander J. |
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| Rok vydání: | 2017 |
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| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/JHEP12(2017)105 |
| Popis: | Flavour-violating Higgs interactions are suppressed in the Standard Model such that their observation would be a clear sign of new physics. We investigate the prospects for detecting quark flavour-violating Higgs decays in the clean ILC environment. Concentrating on the decay to a bottom and a light quark $j$, we identify the dominant Standard Model background channels as coming from hadronic Standard Model Higgs decays with mis-identified jets. Therefore, good flavour tagging capabilities are essential to keep the background rate under control. Through a simple cut-based analysis, we find that the most promising search channel is the two-jet plus missing energy signature $e^+e^-\to bj+E_{T}^\text{miss}$. At 500 GeV, the expected $95\,$% CL upper limit on $\mathcal{B}(h\to bj)$ is of order $10^{-3}$. Correspondingly, a $5\,\sigma$ discovery is expected to be possible for branching ratios as low as a few $10^{-3}$. Comment: 9 pages, 6 figures, 5 tables. Minor typos fixed with respect to v2 |
| Databáze: | arXiv |
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