<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mrow><mml:mi mathvariant="italic">SU</mml:mi></mml:mrow><mml:msub><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mn>2</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mi>X</mml:mi></mml:mrow></mml:msub></mml:math>vector DM and Galactic Center gamma-ray excess

Chen, Chuan Hung; Nomura, Takaaki

doi:10.1016/j.physletb.2015.05.027

Cited by 32 publications

(18 citation statements)

References 90 publications

(95 reference statements)

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“…Such a discrete gauge symmetry ensures the stability of χ μ andχ μ to be good DM candidates. Here, ϕ r plays the role of a messenger between the hidden sector and the visible sector through the gauge interaction given by [20] …”

Section: The Modelmentioning

confidence: 99%

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Explaining the DAMPE e+e− excess using the Higgs triplet model with a vector dark matter

Chen

Chiang

Nomura³

2018

Phys. Rev. D

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We explain the e þ e − excess observed by the DAMPE Collaboration using a dark matter model based upon the Higgs triplet model and an additional hidden SUð2Þ X gauge symmetry. Two of the SUð2Þ X gauge bosons are stable due to a residual discrete symmetry and serve as the dark matter candidate. We search the parameter space for regions that can explain the observed relic abundance, and compute the flux of e þ e − coming from a nearby dark matter subhalo. With the inclusion of background cosmic rays, we show that the model can render a good fit to the entire energy spectrum covering the AMS-02, Fermi-LAT, CALET and DAMPE data.

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Section: The Modelmentioning

confidence: 99%

“…The assumed masses above result in the Breit-Wigner resonance enhancement in the pair annihilation process. This in turn affects both relic abundance of DM [25] and positron/antiproton fluxes [26,27] In the nonrelativistic limit, the DM annihilation cross section is given by [20] σv ≃ 1 192π…”

Section: Dark Matter Relic Abundance and Annihilation Signalmentioning

confidence: 99%

Explaining the DAMPE e+e− excess using the Higgs triplet model with a vector dark matter

Chen

Chiang

Nomura³

2018

Phys. Rev. D

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“…Moreover, from the benchmark points it can also be seen that the spin independent direct detection crosssection for the fermionic dark matter candidate calculated using Eqs. (34,35) is very small and remains below the limits from the most stringent constraints on the DM-nucleon cross-section given by LUX [6], XENON-1T [7] etc.…”

Section: Galactic Centre Gamma Ray Excess and Dark Matter Self Interamentioning

confidence: 97%

“…The Weakly Interacting Massive particle (WIMP) [11,12] is the most favourite class for the thermal dark matter scenario. Some of the most studied WIMPs in the existing literature are neutralino [13], scalar singlet dark matter [14][15][16][17], inert doublet dark matter [18][19][20][21][22][23][24][25][26][27][28][29][30], singlet fermionic dark matter [31][32][33], hidden sector vector dark matter [34][35][36] etc.…”

Section: Introductionmentioning

confidence: 99%

Two component WIMP–FImP dark matter model with singlet fermion, scalar and pseudo scalar

et al. 2017

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We explore a two component dark matter model with a fermion and a scalar. In this scenario the Standard Model (SM) is extended by a fermion, a scalar and an additional pseudo scalar. The fermionic component is assumed to have a global U(1) DM and interacts with the pseudo scalar via Yukawa interaction while a Z 2 symmetry is imposed on the other component -the scalar. These ensure the stability of both dark matter components. Although the Lagrangian of the present model is CP conserving, the CP symmetry breaks spontaneously when the pseudo scalar acquires a vacuum expectation value (VEV). The scalar component of the dark matter in the present model also develops a VEV on spontaneous breaking of the Z 2 symmetry. Thus the various interactions of the dark sector and the SM sector occur through the mixing of the SM like Higgs boson, the pseudo scalar Higgs like boson and the singlet scalar boson. We show that the observed gamma ray excess from the Galactic Centre as well as the 3.55 keV X-ray line from Perseus, Andromeda etc. can be simultaneously explained in the present two component dark matter model and the dark matter self interaction is found to be an order of magnitude smaller than the upper limit estimated from the observational results.

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“…In the scenarios (III) and (IV), a DM pair dominantly annihilates via s-channel processes where ρ(≃ H 3 ) propagates as an intermediate particle; the dominant final states are, depending on parameters, {hh, f SM f SM , W + W − , ZZ} and {H 1 H 1 , AA, H + H − } for the scenarios (III) and (IV) respectively as shown in figure 1 (C) and (D), and aa channel in figure 1-(B) which contributes to both scenarios. Note that, µ 2S induces mixing between h 2 and ρ and we discuss constraint from direct detection taking into account Higgs portal interaction [26][27][28][29][30][31][32] with the mixing effect for scenario (III).…”

Section: Dark Matter Physicsmentioning

confidence: 99%

Dark matter physics in neutrino specific two Higgs doublet model

Baek¹,

Nomura²

2017

J. High Energ. Phys.

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Although the seesaw mechanism is a natural explanation for the small neutrino masses, there are cases when the Majorana mass terms for the right-handed neutrinos are not allowed due to symmetry. In that case, if neutrino-specific Higgs doublet is introduced, neutrinos become Dirac particles and their small masses can be explained by its small VEV. We show that the same symmetry, which we assume a global U(1) X , can also be used to explain the stability of dark matter. In our model, a new singlet scalar breaks the global symmetry spontaneously down to a discrete Z 2 symmetry. The dark matter particle, lightest Z 2 -odd fermion, is stabilized. We discuss the phenomenology of dark matter: relic density, direct detection, and indirect detection. We find that the relic density can be explained by a novel Goldstone boson channel or by resonance channel. In the most region of parameter space considered, the direct detections is suppressed well below the current experimental bound. Our model can be further tested in indirect detection experiments such as FermiLAT gamma ray searches or neutrinoless double beta decay experiments.

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SU(2)Xvector DM and Galactic Center gamma-ray excess

Cited by 32 publications

References 90 publications

Explaining the DAMPE e+e− excess using the Higgs triplet model with a vector dark matter

Explaining the DAMPE e+e− excess using the Higgs triplet model with a vector dark matter

Two component WIMP–FImP dark matter model with singlet fermion, scalar and pseudo scalar

Dark matter physics in neutrino specific two Higgs doublet model

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