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

Chen, Chuan Hung; Chiang, Cheng‐Wei; Nomura, Takaaki

doi:10.1103/physrevd.97.061302

Cited by 21 publications

(10 citation statements)

References 58 publications

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“…The current analysis yields no evidence for a line or a DM feature. With the DM model assumed in the present analysis or for a pure line case, we do not find any indication for the presence of a feature at 1.4 TeV, as suggested by the recent DAMPE measurements [54][55][56][57].…”

Section: Discussionsupporting

confidence: 50%

Search for features in the cosmic-ray electron and positron spectrum measured by the Fermi Large Area Telescope

et al. 2018

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The Large Area Telescope onboard the Fermi Gamma-ray Space Telescope has collected the largest ever sample of high-energy cosmic-ray electron and positron events. Possible features in their energy spectrum could be a signature of the presence of nearby astrophysical sources, or of more exotic sources, such as annihilation or decay of dark matter (DM) particles in the Galaxy. In this paper for the first time we search for a delta-like line feature in the cosmic-ray electron and positron spectrum. We also search for a possible feature originating from DM particles annihilating into electron-positron pairs. Both searches yield negative results, but we are able to set constraints on the line intensity and on the velocity-averaged DM annihilation cross section. Our limits extend up to DM masses of 1.7 TeV/c 2 , and exclude the thermal value of the annihilation cross-section for DM lighter than 150 GeV/c 2 .PACS numbers: 95.35.+d, 95.85.Ry

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Section: Discussionsupporting

confidence: 50%

Search for features in the cosmic-ray electron and positron spectrum measured by the Fermi Large Area Telescope

et al. 2018

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“…Some models are based on the typical new-gauge anomaly-free Uð1Þ family symmetry with the corresponding gauge boson as the mediator [65][66][67][68][69][70][71]. Other proposals, such as a scalar mediator with typical lepton-specific Yukawa couplings, have also been discussed [83][84][85][86][87][88][89]. However, many existing DM explanations of the DAMPE results are rather ad hoc and the involved interactions are not naturally the consequence of a well-motivated popular beyond-the-SM (BSM) model.…”

Section: Introductionmentioning

confidence: 99%

Scalar dark matter explanation of the DAMPE data in the minimal left-right symmetric model

et al. 2018

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The left-right symmetric model (LRSM) is an attractive extension of the Standard Model (SM) that can address the origin of parity violation in the SM electroweak interactions, generate tiny neutrino masses, accommodate dark matter (DM) candidates, and provide a natural framework for baryogenesis through leptogenesis. In this work, we utilize the minimal LRSM to study the recently reported DAMPE results of the cosmic e þ e − spectrum, which exhibits a tentative peak around 1.4 TeV, while satisfying the current neutrino data. We propose to explain the DAMPE peak with a complex scalar DM χ in two scenarios: (1) χχ Ã → H þþ

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“…(26). However, this is also highly suppressed by the large scalar mass m H;A ≃ m D ≃ 3 TeV: for the benchmark value of ðλ 4 − λ 5 Þ ¼ 1 and the cut p T > 500 GeV on the primary jet [50][51][52][53][54], the total cross section for the process in Eq.…”

Section: A Prospects At 100 Tev Hadron Collidermentioning

confidence: 99%

Prospects of type-II seesaw models at future colliders in light of the DAMPEe+e−excess

Sui¹

2018

Phys. Rev. D

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The DAMPE e þ e − excess at around 1.4 TeV could be explained in the type-II seesaw model with a scalar dark mater D which is stabilized by a discrete Z 2 symmetry. The simplest scenario is the annihilation DD → H þþ H −− followed by the subsequent decay H AEAE → e AE e AE , with both the DM and triplet scalars roughly 3 TeV with a small mass splitting. In addition to the Drell-Yan process at future 100 TeV hadron colliders, the doubly charged components could also be produced at lepton colliders like ILC and CLIC in the off shell mode and mediate lepton flavor violating processes e þ e − → l AE i l ∓ j (with i ≠ j). A wide range of parameter space of the type-II seesaw could be probed, which are well below the current stringent lepton flavor constraints.

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

Cited by 21 publications

References 58 publications

Search for features in the cosmic-ray electron and positron spectrum measured by the Fermi Large Area Telescope

Search for features in the cosmic-ray electron and positron spectrum measured by the Fermi Large Area Telescope

Scalar dark matter explanation of the DAMPE data in the minimal left-right symmetric model

Prospects of type-II seesaw models at future colliders in light of the DAMPEe+e−excess

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