For the newly discovered W-boson mass anomaly, one of the simplest dark
matter (DM) models that can account for the anomaly without violating other
astrophysical/experimental constraints is the inert two Higgs doublet model, in
which the DM mass (mSβ) is found to be within βΌ54β74 GeV. In this
model, the annihilation of DM via SSβbbΛ and SSβWWβ would
produce antiprotons and gamma rays, and may account for the excesses identified
previously in both particles. Motivated by this, we re-analyze the AMS-02
antiproton and Fermi-LAT Galactic center gamma-ray data. For the antiproton
analysis, the novel treatment is the inclusion of the charge-sign-dependent
three-dimensional solar modulation model as constrained by the time-dependent
proton data. We find that the excess of antiprotons is more distinct than
previous results based on the force-field solar modulation model. The
interpretation of this excess as the annihilation of SSβWWβ (SSβbbΛ) requires a DM mass of βΌ40β80 (40β60) GeV and a
velocity-averaged cross section of O(10β26)Β cm3Β sβ1. As for the
Ξ³-ray data analysis, rather than adopting the widely-used spatial
template fitting, we employ an orthogonal approach with a data-driven spectral
template analysis. The fitting to the GeV Ξ³-ray excess yields DM model
parameters overlapped with those to fit the antiproton excess via the WWβ
channel. The consistency of the DM particle properties required to account for
the W-boson mass anomaly, the GeV antiproton excess, and the GeV Ξ³-ray
excess suggest a common origin of them.Comment: 8 page