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 [InlineMediaObject not available: see fulltext.]. At 500 GeV, the expected 95% CL upper limit on ℬ (h→ bj) is of order 10−3. Correspondingly, a 5σ discovery is expected to be possible for branching ratios as low as a few 10−3.

Quark flavour-violating Higgs decays at the ILC

Barducci D.;
2017-01-01

Abstract

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 [InlineMediaObject not available: see fulltext.]. At 500 GeV, the expected 95% CL upper limit on ℬ (h→ bj) is of order 10−3. Correspondingly, a 5σ discovery is expected to be possible for branching ratios as low as a few 10−3.
2017
Barducci, D.; Helmboldt, A. J.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1219428
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