Cosmic rays through the Higgs portal

Dick, Rainer; Mann, Robert B.; Wunderle, Kai E.

doi:10.1016/j.nuclphysb.2008.07.016

Cited by 24 publications

(28 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While many possible new states can be added to prevent large corrections to the Higgs boson mass, the simplest choice consists in including just an inert scalar state [31][32][33][34][35][36][37][38], that is, a scalar particle only interacting with the Higgs boson (and gravity)-and therefore transforming as the singlet representation of the EW gauge group SU (2) × U (1) (and similarly not charged under the color group)-which acquires no vacuum expectation value. Such a choice minimizes unwanted effects on EW radiative corrections and other physics well described by the SM.…”

Section: Low-scale Seesaw and The Little Hierarchy Problemmentioning

confidence: 99%

“…It has been shown [33][34][35][36][37][38] that a single inert singlet that couples with the Higgs boson with a small coupling is a realistic cold weakly interacting DM candidate (WIMP) with a mass below v W . In our case, the singlet may account for the correct relic density in the opposite regime where its mass is much larger than v W and its coupling with the Higgs boson relatively large.…”

Section: Enter Dark Mattermentioning

confidence: 99%

See 1 more Smart Citation

Low-scale neutrino seesaw mechanism and scalar dark matter

Fabbrichesi

Petcov

2014

Eur. Phys. J. C

View full text Add to dashboard Cite

We discuss how two birds-the little hierarchy problem of low-scale type-I seesaw models and the search for a viable dark matter candidate-are (proverbially) killed by one stone: a new inert scalar state. MotivationsTogether with the presence of dark matter (DM), neutrino oscillations-and the small neutrino mass entailed-are the only physics beyond the standard model (SM) experimentally confirmed.The most attractive model to account for the smallness of the neutrino masses is the seesaw mechanism [1][2][3][4]. This mechanism requires right-handed (RH) neutrinos whose masses can be taken at the GUT scale or, in low-scale scenarios, at lower energies if the Yukawa couplings are taken proportionally smaller, for instance, of the order of those of the charged leptons.The inclusion of these new states within the SM induces a finite renormalization that tends to pull the Higgs boson mass (or, equivalently, the electroweak (EW) scale) toward the higher scale. This is not a problem if the new states are themselves at the EW scale and the renormalization is itself of the order of the Higgs boson mass. If instead the new states are at a larger scale, they give rise to a hierarchy problem in which in order to keep the Higgs boson mass to its experimental value we have to cancel the renormalization to the higher scale to a degree that becomes increasingly fine-tuned as the new states are taken at higher mass scales.Such a cancelation can be achieved by a redefinition of the Higgs boson bare mass but it is more appealing and practical to use the hierarchy problem in a heuristic manner to help us in the definition of whatever model of physics we assume to exist beyond the SM [5]. a e-mail: marco@sissa.itThe problem of the large contribution to the Higgs mass m H coming from the new states is best understood in terms of the renormalization group equation (RGE)where the anomalous dimension is given, at one-loop order, byin dimensional regularization and where we only wrote the dominant contributions from the Higgs boson potential (λ), the top quark (λ t ) and the gauge couplings (g 1 and g 2 ). If new states are present at a higher scale, they must be introduced as a threshold effect in order to match the low-and highscale effective theories. That these threshold corrections are larger and larger as the new states are taken to be heavier and heavier is the hierarchy problem in the framework of an effective theory. According to the proposed approach, the new stateswhen they are taken together-must enter in such a way that their overall effect on the Higgs boson mass renormalization is no larger than the EW scale, thus making the bare mass renormalization natural. In other words, using the RGE terminology, the threshold corrections must be small and if the new states are very heavy they must enter in such a way as to cancel their respective contributions.The fine-tuning, if present, is all among the new states rather than between them and the SM contributions. In this approach it is possible to keep the physics at the two ...

show abstract

Section: Low-scale Seesaw and The Little Hierarchy Problemmentioning

confidence: 99%

Section: Enter Dark Mattermentioning

confidence: 99%

Low-scale neutrino seesaw mechanism and scalar dark matter

Fabbrichesi

Petcov

2014

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…Such a model, known as the singlet scalar model of dark matter, has been studied several times in the literature [1,2,3,4,5,6]. Predictivity is undoubtedly its most salient feature.…”

Section: Introductionmentioning

confidence: 99%

Antimatter signals of singlet scalar dark matter

Goudelis

Mambrini²,

Yaguna³

2009

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

We consider the singlet scalar model of dark matter and study the expected antiproton and positron signals from dark matter annihilations. The regions of the viable parameter space of the model that are excluded by present data are determined, as well as those regions that will be probed by the forthcoming experiment AMS-02. In all cases, different propagation models are investigated, and the possible enhancement due to dark matter substructures is analyzed. We find that the antiproton signal is more easily detectable than the positron one over the whole parameter space. For a typical propagation model and without any boost factor, AMS-02 will be able to probe -via antiprotons-the singlet model of dark matter up to masses of 600 GeV. Antiprotons constitute, therefore, a promising signal to constraint or detect the singlet scalar model.

show abstract

“…These scalar interactions give rise to the so-called singlet scalar or Higgs-portal model [51][52][53], where dark matter annihilations are mediated by the Higgs boson. These models are quite predictive and have been the subject of many previous analyses [54][55][56][57][58][59][60][61][62][63]. In this paper we assume instead that the scalar dark matter interacts dominantly via the Yukawa interactions in Eq.…”

Section: Dark Matter Phenomenologymentioning

confidence: 99%

Lepton flavor violation and scalar dark matter in a radiative model of neutrino masses

et al. 2018

View full text Add to dashboard Cite

We consider a simple extension of the Standard Model that can account for the dark matter and explain the existence of neutrino masses. The model includes a vectorlike doublet of SU(2), a singlet fermion, and two scalar singlets, all of them odd under a new Z 2 symmetry. Neutrino masses are generated radiatively by one-loop processes involving the new fields, while the dark matter candidate is the lightest neutral particle among them. We focus specifically on the case where the dark matter particle is one of the scalars and its relic density is determined by its Yukawa interactions. The phenomenology of this setup, including neutrino masses, dark matter and lepton flavor violation, is analyzed in some detail. We find that the dark matter mass must be below 600 GeV to satisfy the relic density constraint. Lepton flavor violating processes are shown to provide the most promising way to test this scenario. Future μ → 3e and μ-e conversion experiments, in particular, have the potential to probe the entire viable parameter space of this model.

show abstract

Cosmic rays through the Higgs portal

Cited by 24 publications

References 81 publications

Low-scale neutrino seesaw mechanism and scalar dark matter

Low-scale neutrino seesaw mechanism and scalar dark matter

Antimatter signals of singlet scalar dark matter

Lepton flavor violation and scalar dark matter in a radiative model of neutrino masses

Contact Info

Product

Resources

About