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Title: Rate for annihilation of galactic dark matter into two photons

Abstract

We perform a calculation of the cross section for neutralino-neutralino annihilation into two photons and apply it to dark matter in the galactic halo to find the counting rate in a large {gamma}-ray detector such as EGRET or ASTROGAM. Combining constraints from particle accelerators with the requirement that the neutralinos make up the dark matter we find that rates over a few dozen events per year are unlikely. We list the assumptions that go into our conclusions and suggest other particle dark-matter candidates which could give larger and perhaps observable signals.

Authors:
 [1];  [2]
  1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (US)
  2. Astronomy and Astrophysics Center, Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510
Publication Date:
OSTI Identifier:
5355557
Resource Type:
Journal Article
Journal Name:
Physical Review (Section) D: Particles and Fields; (USA)
Additional Journal Information:
Journal Volume: 40:8; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GALAXIES; NONLUMINOUS MATTER; ANNIHILATION; CROSS SECTIONS; ELASTIC SCATTERING; FERMIONS; FEYNMAN DIAGRAM; GAMMA DETECTION; GAUGE INVARIANCE; HIGGS BOSONS; MASS; NEUTRINOS; PAIR PRODUCTION; PARTICLE INTERACTIONS; PHOTONS; WEAK INTERACTIONS; BASIC INTERACTIONS; DETECTION; DIAGRAMS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; INTERACTIONS; INVARIANCE PRINCIPLES; LEPTONS; MASSLESS PARTICLES; POSTULATED PARTICLES; RADIATION DETECTION; SCATTERING; 640105* - Astrophysics & Cosmology- Galaxies

Citation Formats

Giudice, G F, and Griest, K. Rate for annihilation of galactic dark matter into two photons. United States: N. p., 1989. Web. doi:10.1103/PhysRevD.40.2549.
Giudice, G F, & Griest, K. Rate for annihilation of galactic dark matter into two photons. United States. https://doi.org/10.1103/PhysRevD.40.2549
Giudice, G F, and Griest, K. 1989. "Rate for annihilation of galactic dark matter into two photons". United States. https://doi.org/10.1103/PhysRevD.40.2549.
@article{osti_5355557,
title = {Rate for annihilation of galactic dark matter into two photons},
author = {Giudice, G F and Griest, K},
abstractNote = {We perform a calculation of the cross section for neutralino-neutralino annihilation into two photons and apply it to dark matter in the galactic halo to find the counting rate in a large {gamma}-ray detector such as EGRET or ASTROGAM. Combining constraints from particle accelerators with the requirement that the neutralinos make up the dark matter we find that rates over a few dozen events per year are unlikely. We list the assumptions that go into our conclusions and suggest other particle dark-matter candidates which could give larger and perhaps observable signals.},
doi = {10.1103/PhysRevD.40.2549},
url = {https://www.osti.gov/biblio/5355557}, journal = {Physical Review (Section) D: Particles and Fields; (USA)},
issn = {0556-2821},
number = ,
volume = 40:8,
place = {United States},
year = {Sun Oct 15 00:00:00 EDT 1989},
month = {Sun Oct 15 00:00:00 EDT 1989}
}