Indirect Detection for Higgs Portal Majorana Fermionic Dark Matter

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{...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2024-07
Main Authors: Haba, Naoyuki, Ikemoto, Junpei, Shimizu Yasuhiro, Yamada, Toshifumi
Format: Article
Language:English
Subjects:
Bosons
Dark matter
Dwarf galaxies
Fermions
Gamma rays
Higgs bosons
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2331-8422