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Indirect Detection for Higgs Portal Majorana Fermionic Dark Matter by Haba, Naoyuki; Ikemoto, Junpei; Yasuhiro, Shimizu; Yamada, Toshifumi is a scholarly article available to read on EtoBox.

What is Indirect Detection for Higgs Portal Majorana Fermionic Dark Matter about?

We study the $\gamma$-ray signal emitted from dark matter (DM) pair annihilation in the Higgs portal Majorana fermion DM model. In the model, a Majorana fermion DM $\chi$ couples with the Standard Model (SM) Higgs field $H$ through a higher-dimensional term $-{\cal L}\supset H^\dagger H \bar{\chi}\chi/\Lambda$, where $\Lambda$ is a cutoff scale. The pair annihilation of $\chi$ through the above term produces the Higgs boson and the longitudinal modes of $W,Z$ gauge bosons. The Milky Way dwarf spheroidal satellite galaxies (dSphs) are used as the most promising targets to search for the $\gamma$-ray signal of the model, due to high DM density and lack of astrophysical backgrounds. The {\it Fermi} Large Area Telescope ({\it Fermi}-LAT) is used for the search, for its high sensitivity. In this work, we use 14-year {\it Fermi}-LAT data from 16 dSphs, to constrain the DM pair annihilation cross section for the DM mass range from 125 GeV to 100 TeV.

Author

Haba, Naoyuki; Ikemoto, Junpei; Yasuhiro, Shimizu; Yamada, Toshifumi

Published

2024

Language

EN