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Title: Cold Positrons from Decaying Dark Matter

Abstract

Many models of dark matter contain more than one new particle beyond those in the Standard Model. Often heavier particles decay into the lightest dark matter particle as the Universe evolves. Here we explore the possibilities that arise if one of the products in a (Heavy Particle) $$\rightarrow$$ (Dark Matter) decay is a positron, and the lifetime is shorter than the age of the Universe. The positrons cool down by scattering off the cosmic microwave background and eventually annihilate when they fall into Galactic potential wells. The resulting 511 keV flux not only places constraints on this class of models but might even be consistent with that observed by the INTEGRAL satellite.

Authors:
 [1];  [2];  [1]
  1. Universitate de Valencia (Spain)
  2. Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1155800
Report Number(s):
FTUV-12-0611; IFIC-12-41; FERMILAB-PUB-12-376-A
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1206.3076
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 86; Journal Issue: 10; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Boubekeur, Lotfi, Dodelson, Scott, and Vives, Oscar. Cold Positrons from Decaying Dark Matter. United States: N. p., 2012. Web. doi:10.1103/PhysRevD.86.103520.
Boubekeur, Lotfi, Dodelson, Scott, & Vives, Oscar. Cold Positrons from Decaying Dark Matter. United States. doi:10.1103/PhysRevD.86.103520.
Boubekeur, Lotfi, Dodelson, Scott, and Vives, Oscar. Thu . "Cold Positrons from Decaying Dark Matter". United States. doi:10.1103/PhysRevD.86.103520. https://www.osti.gov/servlets/purl/1155800.
@article{osti_1155800,
title = {Cold Positrons from Decaying Dark Matter},
author = {Boubekeur, Lotfi and Dodelson, Scott and Vives, Oscar},
abstractNote = {Many models of dark matter contain more than one new particle beyond those in the Standard Model. Often heavier particles decay into the lightest dark matter particle as the Universe evolves. Here we explore the possibilities that arise if one of the products in a (Heavy Particle) $\rightarrow$ (Dark Matter) decay is a positron, and the lifetime is shorter than the age of the Universe. The positrons cool down by scattering off the cosmic microwave background and eventually annihilate when they fall into Galactic potential wells. The resulting 511 keV flux not only places constraints on this class of models but might even be consistent with that observed by the INTEGRAL satellite.},
doi = {10.1103/PhysRevD.86.103520},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
issn = {1550-7998},
number = 10,
volume = 86,
place = {United States},
year = {2012},
month = {11}
}