Scalar dark matter explanation of the DAMPE data in the minimal Left-Right symmetric model

Abstract

Left-Right symmetric model (LRSM) has been an attractive extension of the Standard Model (SM) which can address the origin of parity violation in the SM electroweak (EW) 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 cosmic $e^{+}{e}^{-}$ 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 $\chi$ in two scenarios: 1) $\chi {\chi }^{\ast }\to H_1^{++}{H}_1^{--}\to {\ell }_i^{+}{\ell }_i^{+}{\ell }_j^{-}{\ell }_j^{-}$; 2) $\chi {\chi }^{\ast }\to H_k^{++}{H}_k^{--}\to {\ell }_i^{+}{\ell }_i^{+}{\ell }_j^{-}{\ell }_j^{-}$ accompanied by $\chi {\chi }^{\ast }\to H_1^{+}{H}_1^{-}\to {\ell }_i^{+}{\nu }_{{\ell }_i}{\ell }_j^{-}{\nu }_{{\ell }_j}$ with ${\ell }_{i,j}=e,\mu ,\tau$ and $k=1,2$. We fit the theoretical prediction on $e^{+}{e}^{-}$ spectrum to relevant experimental data to determine the scalar mass spectrum favored by the DAMPE excess. We also consider various constraints from theoretical principles, collider experiments as well as DM relic density and direct search experiments. We find that there are ample parameter space which can interpret the DAMPE data while passing the constraints. Our explanations, on the other hand, usually imply the existence of other new physics at the energy scale ranging from $10^7\mathrm{GeV}$ to $10^{11}\mathrm{GeV}$. Collider tests of our explanations are also discussed.

25 pages, 4 figures, 4 Tables, refined discussions about motivation of introducing scalar DM to LRSM, partial 2-loop RGE

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Cited by in corpus (16)

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• TeV dark matter and the DAMPE electron excess
• Prospects of gravitational waves in the minimal left-right symmetric model
• Electron Flavored Dark Matter
• The DAMPE excess and gamma-ray constraints
• DAMPE Excess from Leptophilic Vector Dark Matter: Model Independent Approach
• Two-mediator dark matter models and cosmic electron excess
• Indirect effects of dark matter
• Type II Seesaw with scalar dark matter in light of AMS-02, DAMPE and Fermi-LAT
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• The "Dark disk" model in the light of DAMPE experiment
• Scalar dark matter with $Z_3$ symmetry in Type-II Seesaw
• Multicomponent Dark Matter in the Light of CALET and DAMPE