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Title: Late kinetic decoupling of light magnetic dipole dark matter

Abstract

We study the kinetic decoupling of light (≲10 GeV) magnetic dipole dark matter (DM). We find that present bounds from collider, direct DM searches, and structure formation allow magnetic dipole DM to remain in thermal equilibrium with the early universe plasma until as late as the electron-positron annihilation epoch. This late kinetic decoupling leads to a minimal mass for the earliest dark protohalos of thousands of solar masses, in contrast to the conventional weak scale DM scenario where they are of order 10{sup −6} solar masses.

Authors:
 [1];  [2]
  1. Department of Physics and Astronomy, University of Utah,Salt Lake City, UT 84112 (United States)
  2. Center for Theoretical Physics of the Universe, Institute for Basic Science,Daejeon 34051 (Korea, Republic of)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572091
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 06; Other Information: PUBLISHER-ID: JCAP06(2016)012; OAI: oai:repo.scoap3.org:15899; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COSMOLOGY; DECOUPLING; ELECTRON-POSITRON INTERACTIONS; GEV RANGE 01-10; MAGNETIC DIPOLES; MASS; NONLUMINOUS MATTER; THERMAL EQUILIBRIUM; UNIVERSE

Citation Formats

Gondolo, Paolo, and Kadota, Kenji. Late kinetic decoupling of light magnetic dipole dark matter. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/06/012.
Gondolo, Paolo, & Kadota, Kenji. Late kinetic decoupling of light magnetic dipole dark matter. United States. doi:10.1088/1475-7516/2016/06/012.
Gondolo, Paolo, and Kadota, Kenji. Tue . "Late kinetic decoupling of light magnetic dipole dark matter". United States. doi:10.1088/1475-7516/2016/06/012.
@article{osti_22572091,
title = {Late kinetic decoupling of light magnetic dipole dark matter},
author = {Gondolo, Paolo and Kadota, Kenji},
abstractNote = {We study the kinetic decoupling of light (≲10 GeV) magnetic dipole dark matter (DM). We find that present bounds from collider, direct DM searches, and structure formation allow magnetic dipole DM to remain in thermal equilibrium with the early universe plasma until as late as the electron-positron annihilation epoch. This late kinetic decoupling leads to a minimal mass for the earliest dark protohalos of thousands of solar masses, in contrast to the conventional weak scale DM scenario where they are of order 10{sup −6} solar masses.},
doi = {10.1088/1475-7516/2016/06/012},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 06,
volume = 2016,
place = {United States},
year = {Tue Jun 07 00:00:00 EDT 2016},
month = {Tue Jun 07 00:00:00 EDT 2016}
}