Constraints imposed by CP conservation in the presence of pseudoparticles

Peccei, R.D.; Quinn, Helen R.

doi:10.1142/9789814329057_0016

Cited by 392 publications

(672 citation statements)

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“…All bounds are derived assuming that the Peccei-Quinn mechanism [29] is at work. We pay special attention to the role of hadronic and nuclear uncertainties.…”

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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“…All bounds are derived assuming that the Peccei-Quinn mechanism [29] is at work. We pay special attention to the role of hadronic and nuclear uncertainties.…”

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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“…It is then natural to identify the scale M I with the breaking scale f a of a PQ symmetry U(1) PQ [18], which resolves the strong CP problem. Moreover, the µ parameter of MSSM could be obtained as µ ∼ f 2 a /m P ∼ m 3/2 [19].…”

Section: A Simultaneous Solution Of the Strong Cp And µ Problemsmentioning

confidence: 99%

“…The strong CP problem can be elegantly resolved by including a Peccei-Quinn (PQ) symmetry [18] broken spontaneously at an intermediate mass scale, which can be easily generated within the supergravity (SUGRA) extension of MSSM. The PQ field, which breaks the PQ symmetry, corresponds, in this case, to a flat direction in field space lifted by non-renormalizable interactions.…”

Section: Introductionmentioning

confidence: 99%

The Peccei-Quinn field as curvaton

Dimopoulos

Lazarides

Lyth

et al. 2003

J. High Energy Phys.

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A simple extension of the minimal supersymmetric standard model which naturally and simultaneously solves the strong CP and µ problems via a PecceiQuinn and a continuous R symmetry is considered. This model is supplemented with hybrid inflation and leptogenesis, but without taking the specific details of these scenarios. It is shown that the Peccei-Quinn field can successfully act as a curvaton generating the total curvature perturbation in the universe in accord with the cosmic background explorer measurements. A crucial phenomenon, which assists us to achieve this, is the 'tachyonic amplification' of the perturbation acquired by this field during inflation if the field, in its subsequent evolution, happens to be stabilized for a while near a maximum of the potential. In this case, the contribution of the field to the total energy density is also enhanced ('tachyonic effect'), which helps too. The cold dark matter in the universe consists, in this model, mainly of axions which carry an isocurvature perturbation uncorrelated with the total curvature perturbation. There are also lightest sparticles (neutralinos) which, like the baryons, originate from the inflationary reheating and, thus, acquire an isocurvature perturbation fully correlated with the curvature perturbation. So, the overall isocurvature perturbation has a mixed correlation with the adiabatic one. It is shown that the presently available bound on such an isocurvature perturbation from cosmic microwave background radiation and other data is satisfied. Also, the constraint on the non-Gaussianity of the curvature perturbation obtained from the recent Wilkinson microwave anisotropy probe data is fulfilled thanks to the 'tachyonic effect'.

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“…A DM relic particle candidate must be non-relativistic, must be stable on the cosmological time scale, and must interact weakly with other particles. Some of the possible candidates are: WIMPS [16], axions [17,18,19,20,21], MeV-scalar fields [22,23], technicolor candidates [24,25,26], and ultra-light scalar fields [27,28,29,30,31,32]. An ultra-light scalar field is motivated as DM because it can alleviate some of the problems that arise at galactic scale in the standard paradigm of cold DM, namely, the origin of cuspy halos [33] and the overproduction of substructure [34].…”

Section: Introductionmentioning

confidence: 99%

Confusing the extragalactic neutrino flux limit with a neutrino propagation limit

Barranco

Miranda

Moura

et al. 2011

J. Cosmol. Astropart. Phys.

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ABSTRACT:We study the possible suppression of the extragalactic neutrino flux due to a nonstandard interaction during its propagation. In particular, we study neutrino interaction with an ultra-light scalar field dark matter. It is shown that the extragalactic neutrino flux may be suppressed by such an interaction, leading to a new mechanism to reduce the ultra-high energy neutrino flux. We study both the cases of non-self-conjugate as well as self-conjugate dark matter. In the first case, the suppression is independent of the neutrino and dark matter masses. We conclude that care must be taken when explaining limits on the neutrino flux through source acceleration mechanisms only, since there could be other mechanisms for the reduction of the neutrino flux.

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Constraints imposed by CP conservation in the presence of pseudoparticles

Cited by 392 publications

References 0 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

The Peccei-Quinn field as curvaton

Confusing the extragalactic neutrino flux limit with a neutrino propagation limit

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