Enhanced Higgs boson coupling to charm pairs

Delaunay, Cédric; Golling, T.; Pérez, Gilad; Soreq, Yotam

doi:10.1103/physrevd.89.033014

Cited by 57 publications

(59 citation statements)

References 36 publications

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“…While the LHC Run 2 will improve the bound on Im Y c by at most a factor of two, the next generation of EDM experiments will probe this coupling at the 10 −5 level, out of the reach of collider experiments. It is nonetheless important to pursue direct probes of this coupling, for example by studying decays of the Higgs to cc [151]. Current collider and EDM bounds on Im Y s and Im Y b are comparable, with the LHC having a slight edge.…”

Section: Jhep02(2016)011mentioning

confidence: 99%

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

Chien

Cirigliano

Dekens

et al. 2016

J. High Energ. Phys.

117

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Abstract:We investigate direct and indirect constraints on the complete set of anomalous CP-violating Higgs couplings to quarks and gluons originating from dimension-6 operators, by studying their signatures at the LHC and in electric dipole moments (EDMs). We show that existing uncertainties in hadronic and nuclear matrix elements have a significant impact on the interpretation of EDM experiments, and we quantify the improvements needed to fully exploit the power of EDM searches. Currently, the best bounds on the anomalous CP-violating Higgs interactions come from a combination of EDM measurements and the data from LHC Run 1. We argue that Higgs production cross section and branching ratios measurements at the LHC Run 2 will not improve the constraints significantly. On the other hand, the bounds on the couplings scale roughly linearly with EDM limits, so that future theoretical and experimental EDM developments can have a major impact in pinning down interactions of the Higgs.

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Section: Jhep02(2016)011mentioning

confidence: 99%

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

Chien

Cirigliano

Dekens

et al. 2016

J. High Energ. Phys.

117

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“…The indirect production amplitude is larger, and its interference with the direct mode renders this decay measurable at the LHC and sensitive to the Hcc coupling. Although this coupling can possibly be accessed at the LHC using charm tagging [6], its phase can only be studied using processes such as this rare decay that involve quantum interference effects. It was later realized that other exclusive decays of the Higgs boson to light mesons in association with either a photon or a heavy electroweak gauge boson can similarly be used to probe the Yukawa couplings of the other first-and second-generation quarks [3].…”

Section: Introductionmentioning

confidence: 99%

Rare exclusive decays of theZboson revisited

Huang

Petriello

2015

Phys. Rev. D

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The realization that first-and second-generation Yukawa couplings can be probed by decays of the Higgs boson to a meson in association with a photon has renewed interest in such rare exclusive decays. We present here a detailed study of the rare Z-boson processes Z → J/ψ + γ, Z → Υ+γ, and Z → φ+γ that can serve as benchmarks for the analogous Higgs-boson decays. We include both direct-production and fragmentation contributions to these decays, and consider the leading QCD corrections and the relativistic corrections to the J/ψ and Υ processes. We present numerical predictions for the branching ratios that include a careful accounting of the theoretical uncertainties. *

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“…The NDA estimates for these corrections are, neglecting relative O(1) contributions in the sum [15,107,111], 23) and similarly for the down quarks. If the strong sector is CP violating, thenκ…”

Section: Jhep01(2016)010mentioning

confidence: 99%

Nonstandard Yukawa couplings and Higgs portal dark matter

Bishara

Brod

Uttarayat

et al. 2016

J. High Energ. Phys.

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Abstract:We study the implications of non-standard Higgs Yukawa couplings to light quarks on Higgs-portal dark matter phenomenology. Saturating the present experimental bounds on up-quark, down-quark, or strange-quark Yukawa couplings, the predicted direct dark matter detection scattering rate can increase by up to four orders of magnitude. The effect on the dark matter annihilation cross-section, on the other hand, is subleading unless the dark matter is very light -a scenario that is already excluded by measurements of the Higgs invisible decay width. We investigate the expected size of corrections in multi-Higgsdoublet models with natural flavor conservation, the type-II two-Higgs-doublet model, the Giudice-Lebedev model of light quark masses, minimal flavor violation new physics models, Randall-Sundrum, and composite Higgs models. We find that an enhancement in the dark matter scattering rate of an order of magnitude is possible. Finally, we point out that a discovery of Higgs-portal dark matter could lead to interesting bounds on the light-quark Yukawa couplings.

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Enhanced Higgs boson coupling to charm pairs

Cited by 57 publications

References 36 publications

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

Rare exclusive decays of theZboson revisited

Nonstandard Yukawa couplings and Higgs portal dark matter

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