Indirect $\mathcal{CP}$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities
| Autor: | Georg Weiglein, Henning Bahl, Sven Heinemeyer, Philip Bechtle, Judith Katzy, Tobias Klingl, Tim Stefaniak, Matthias Saimpert, Krisztian Peters |
|---|---|
| Přispěvatelé: | SCOAP |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
top: coupling
Top quark fusion [gluon gluon] Yukawa [coupling] Physics beyond the Standard Model pair production [top] 01 natural sciences violation [CP] High Energy Physics - Phenomenology (hep-ph) CERN LHC Coll: upgrade Boson two-photon Physics Large Hadron Collider CMS new physics photon phase: CP Observable hep-ph ATLAS High Energy Physics - Phenomenology (Higgs particle top anti-top) [coupling] CERN LHC Coll CP violation gluon gluon: fusion Higgs boson top: pair production coupling [top] Nuclear and High Energy Physics Particle physics coupling [Higgs particle] Higgs Physics FOS: Physical sciences coupling: (Higgs particle top anti-top) vector boson: massive statistical analysis 0103 physical sciences CP: violation ddc:530 structure upgrade [CERN LHC Coll] 010306 general physics numerical calculations Particle Physics - Phenomenology Higgs particle: coupling 010308 nuclear & particles physics High Energy Physics::Phenomenology gluon CP [phase] Gluon Automatic Keywords Beyond Standard Model massive [vector boson] coupling: Yukawa |
| Zdroj: | Journal of high energy physics 2020(11), 127 (2020). doi:10.1007/JHEP11(2020)127 Journal of High Energy Physics Digital.CSIC. Repositorio Institucional del CSIC instname |
| DOI: | 10.3204/PUBDB-2021-02346 |
| Popis: | Journal of high energy physics 2020(11), 127 (2020). doi:10.1007/JHEP11(2020)127 The $ \mathcal{CP} $ structure of the Higgs boson in its coupling to the particles of the Standard Model is amongst the most important Higgs boson properties which have not yet been constrained with high precision. In this study, all relevant inclusive and differential Higgs boson measurements from the ATLAS and CMS experiments are used to constrain the $ \mathcal{CP} $-nature of the top-Yukawa interaction. The model dependence of the constraints is studied by successively allowing for new physics contributions to the couplings of the Higgs boson to massive vector bosons, to photons, and to gluons. In the most general case, we find that the current data still permits a significant $ \mathcal{CP} $-odd component in the top-Yukawa coupling. Furthermore, we explore the prospects to further constrain the $ \mathcal{CP} $ properties of this coupling with future LHC data by determining tH production rates independently from possible accompanying variations of the $ t\overline{t}H $ rate. This is achieved via a careful selection of discriminating observables. At the HL-LHC, we find that evidence for tH production at the Standard Model rate can be achieved in the Higgs to diphoton decay channel alone. Published by SISSA, [Trieste] |
| Databáze: | OpenAIRE |
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