4 papers
Inelastic Dark Photon Dark Matter for the LUX-ZEPLIN High-Recoil Event and the Galactic Halo Gamma-Ray Excess
Kimiko Yamashita
We show that a dark-photon dark matter framework can simultaneously account for two recently reported anomalies: the halo-like Galactic gamma-ray excess identified by Totani in 15…
Higgs-Portal Spin-1 Dark Matter with Parity-Violating Interaction for a Galactic Halo Gamma Ray Excess
Kimiko Yamashita
We study a dark photon dark matter scenario associated with a gauged symmetry, stabilized by a dark parity that forbids kinetic mixing with the Standard Model. The leading…
Higgs-Portal Stueckelberg Dark Matter
Antonio De Felice, Takehiro Ogura, Shinji Tsujikawa +1
We study dark photon dark matter associated with a dark gauge symmetry. To evade laboratory and cosmological constraints on kinetic mixing with the Standard Model $U(1…
Gravitational Positivity Bounds on Higgs-Portal Dark Matter
Kimiko Yamashita
Gravitational positivity bounds are constraints on a renormalizable theory in the presence of a massless graviton, under the assumption that the gravitational theory is ultraviolet…