Probing top-Higgs non-standard interactions at the LHC

Abstract

Effective interactions involving both the top quark and the Higgs field are among the least constrained of all possible (gauge invariant) dimension-six operators in the Standard Model. Such a handful of operators, in particular the top quark chromomagnetic dipole moment, might encapsulate signs of the new physics responsible for electroweak symmetry breaking. In this work, we compute the contributions of these operators to inclusive Higgs and t tbar h production. We argue that: i) rather strong constraints on the overall size of these operators can already be obtained from the current limits/evidence on Higgs production at the LHC; ii) t tbar h production will provide further key information that is complementary to t tbar measurements, and the possibility of discriminating among different contributions by performing accurate measurements of total and differential rates.

8 pages, 9 figures. v2: Logarithmic contribution of the top quark chromomagnetic operator to Higgs production by gluon fusion corrected

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Cited by in corpus (67)

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• Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction
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• Higgs Low-Energy Theorem (and its corrections) in Composite Models
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• Single Top Production at Next-to-Leading Order in the Standard Model Effective Field Theory
• SMEFT and the Drell-Yan Process at High Energy
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• Effective field theory approach to top-quark decay at next-to-leading order in QCD
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• Signs of Composite Higgs Pair Production at Next-to-Leading Order
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• SMEFT Corrections to $Z$ Boson Decays
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• Implications of CP-violating Top-Higgs Couplings at LHC and Higgs Factories
• Resolving gluon fusion loops at current and future hadron colliders
• New Physics in multi-Higgs boson final states
• Impact of top-Higgs couplings on di-Higgs production at future colliders
• NLO QCD corrections to Higgs boson production in association with a top quark pair and a jet
• Electroweak Baryogenesis with Anomalous Higgs Couplings
• Higgs boson production at large transverse momentum within SMEFT: analytical results
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• Accelerated Matrix Element Method with Parallel Computing
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• A fully differential SMEFT analysis of the golden channel using the method of moments
• Anomalous chromomagnetic moment of quarks
• The $ggh$ variations
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• Combining chromomagnetic and four-fermion operators with leading SMEFT operators for $gg\to hh$ at NLO QCD
• Diboson production in the SMEFT from gluon fusion
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