Thermally produced scalar singlet as leptonphilic dark matter

Abstract

This work proposes a simple extension of the Standard Model where a scalar singlet and a leptonphilic scalar doublet exist. The scalar singlet could act as thermally produced dark matter. It annihilates into leptons through $s$-channel and benefit from the Breit--Winger resonance, so current thermally averaged cross-section are greatly enhanced. The constraints from the isotropic diffuse $\gamma$-ray background and correct dark matter relic abundance are analyzed. We find that the enhanced cross-section could fit the needed cross-section to explain the cosmic electron/positron excess.

This work is quite narrow in terms of the data it considers when discussing the implications of the dark matter model while leaving equally good data/observations out of the picture. That makes the analysis incomplete. So we decide to withdrawal this paper

References in corpus (5)

• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• The spectrum of isotropic diffuse gamma-ray emission between 100 MeV and 820 GeV
• Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
• The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV
• PAMELA Positron Excess as a Signal from the Hidden Sector