Vector Higgs-portal dark matter and Fermi-LAT gamma ray line

Choi, Ki‐Young; Lee, Hyun Min; Seto, Osamu

doi:10.1103/physrevd.87.123541

Cited by 8 publications

(4 citation statements)

References 71 publications

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“…Many authors have provided models of this excess by monochromatic gamma rays from DM annihilation or decay; see, for example, Refs. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. If the source of the gamma-ray excess is DM annihilation, the required cross section into two photons is v ¼ 1:27 Â 10 À27 cm 3 =s for an Einasto DM density distribution; this value can change for a different DM profile [2].…”

mentioning

confidence: 99%

Internal Bremsstrahlung Signature of Real Scalar Dark Matter and Consistency with Thermal Relic Density

Toma

2013

Phys. Rev. Lett.

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A gamma-ray excess from the Galactic center consistent with line emission around 130 GeV was recently found in the Fermi-LAT data. Although the Fermi-LAT Collaboration has not confirmed its significance, such a signal would be a clear signature of dark matter annihilation. Until now, there have been many attempts to explain the excess by dark matter. However, these efforts tend to give too-small cross sections into photons if consistency with the correct thermal relic density of dark matter is required. In this Letter, we consider a simple Yukawa interaction that can be compatible with both aspects and show which parameters are favored.

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confidence: 99%

Internal Bremsstrahlung Signature of Real Scalar Dark Matter and Consistency with Thermal Relic Density

Toma

2013

Phys. Rev. Lett.

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“…The coupling of Y µ to fermions follows from spin connection and is universal with the same coupling parameter. The vector dark matter (geometric dark matter) Y µ in the present work is entirely different than the candidates [12][13][14][15] and [16][17][18][19][20][21][22][23][24][25][26] as well as the the approach in [31]. In particular, the geometric dark matter is not a U(1) gauge boson; it stems from geometry of the spacetime.…”

Section: Introductionmentioning

confidence: 72%

“…It is known that among the well-motivated candidates for vector dark matter are also hidden sector U(1) gauge bosons. They have been studied in a variety of scenarios as hidden vector dark matter which interacts with the standard model fields through kinetic mixing with the photon [12][13][14][15] and through Higgs portal [16][17][18][19][20][21][22][23][24][25][26]. In view of these interactions, those vector dark matter models face stringent constraints from their stability (their lifetimes must be longer than the age of the Universe and their annihilation to the standard model particles must be consistent with experimental data).…”

Section: Introductionmentioning

confidence: 99%

Geometric dark matter

Demir

Puliçe

2020

J. Cosmol. Astropart. Phys.

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The dark matter, needed for various phenomena ranging from flat rotation curves to structure formation, seems to be not only neutral and long-living but also highly secluded from the ordinary matter. Here we show that, metric-affine gravity, which involves metric tensor and affine connection as two independent fields, dynamically reduces, in its minimal form, to the usual gravity plus a massive vector field. The vector Y µ , which interacts with only the quarks, leptons and gravity, is neutral and long-living (longer than the age of the Universe) when its mass range lies in the range 9.4 MeV < M Y < 28.4 MeV. Its scattering cross section from nucleons, which is some 60 orders of magnitude below the current bounds, is too small to facilitate direct detection of the dark matter. This property provides an explanation for whys and hows of dark matter searches. We show that due to its geometrical origin the Y µ does not couple to scalars and gauge bosons. It couples only to fermions. This very feature of the Y µ makes it fundamentally different than all the other vector dark matter candidates in the literature. The geometrical dark matter we present is minimal and self-consistent not only theoretically but also astrophysically in that its feebly interacting nature is all that is needed for its longevity. * Dedicated to the memory of Rahmi Güven, a great physicist and a candid friend.

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“…Therefore, it is not surprising that despite many previous models, there are still opportunities for DM model building.In this paper we consider spin one (vector) gauge fields as DM candidates. Without concerning scale invariance, vector DM [53-72] and some of its theoretical and phenomenological aspects such as direct detection [73][74][75][76][77][78][79][80], indirect detection [81][82][83][84][85][86][87][88], and collider physics aspects [89][90][91][92][93] has already been investigated. As it is mentioned, even scale invariant version of vector dark matter models has already been studied.…”

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confidence: 99%

Conformal vector dark matter and strongly first-order electroweak phase transition

Ayazi

Mohamadnejad

2019

J. High Energ. Phys.

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We study a conformal version of the Standard Model (SM), which apart from SM sector, containing a U D (1) dark sector with a vector dark matter candidate and a scalar field (scalon). In this model the dark sector couples to the SM sector via a Higgs portal. The theory is scaleinvariant in lowest order, therefore the spontaneous symmetry breaking of scale invariance entails the existence of a scalar particle, scalon, with vanishing zeroth-order mass. However, one-loop corrections break scale invariance, so they give mass to the scalon. Because of the scale invariance, our model is subjected to constraints which remove many of the free parameters. We put constraints to the two remaining parameters from the Higgs searches at the LHC, dark matter relic density and dark matter direct detection limits by PandaX-II. The viable mass region for dark matter is about 1-2 TeV. We also obtain the finite temperature one-loop effective potential of the model and demonstrate that finite temperature effects, for the parameter space constrained by dark matter relic density, induce a strongly first-order electroweak phase transition. * syaser.ayazi@semnan.ac.ir † a.mohamadnejad@ut.ac.ir and fermionic loop contributions to the Higgs mass within supersymmetry can also explain the hierarchy problem. However, concerning the null results at the first and second LHC runs [3,4], and other popular theoretical resolutions of the hierarchy problem, such as large extra dimensions, investigating alternative approaches are appealing.As it was mentioned, one approach of addressing the hierarchy problem is the radical assumption that the fundamental theory describing Nature does not have any scale. This idea is well worth considering for its potential to be an sparing solution to the hierarchy problem. The CW mechanism with a Higgs does not work for the electroweak symmetry breaking because the large top mass does not permit radiative breaking of the electroweak symmetry, but, simple extensions of the Higgs sector with additional bosonic degrees of freedom are known to be phenomenologically viable (see, e.g., ). On the other hand, the scale-invariant extension of the Higgs sector, is a generic feature of many DM models with scalar [27][28][29][30][31][32][33][34][35][36][37][38], fermionic [39][40][41][42][43][44][45] and vector [46-52] DM candidates.There are plenty astronomical and cosmological evidences that around 27 percent of the Universe is made of DM. According to the dominant paradigm, DM consists of weakly interacting massive particles (WIMPs) that successfully explain the large scale structures in our Universe.However, the nature of DM is not well understood, and its particle properties such as spin, mass and interactions all are unknown. Therefore, it is not surprising that despite many previous models, there are still opportunities for DM model building.In this paper we consider spin one (vector) gauge fields as DM candidates. Without concerning scale invariance, vector DM [53-72] and some of its theoretical and phenomenological aspe...

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Vector Higgs-portal dark matter and Fermi-LAT gamma ray line

Cited by 8 publications

References 71 publications

Internal Bremsstrahlung Signature of Real Scalar Dark Matter and Consistency with Thermal Relic Density

Internal Bremsstrahlung Signature of Real Scalar Dark Matter and Consistency with Thermal Relic Density

Geometric dark matter

Conformal vector dark matter and strongly first-order electroweak phase transition

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