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Title: Millicharge or decay: a critical take on Minimal Dark Matter

Abstract

Minimal Dark Matter (MDM) is a theoretical framework highly appreciated for its minimality and yet its predictivity. Of the two only viable candidates singled out in the original analysis, the scalar eptaplet has been found to decay too quickly to be around today, while the fermionic quintuplet is now being probed by indirect Dark Matter (DM) searches. It is therefore timely to critically review the MDM paradigm, possibly pointing out generalizations of this framework. We propose and explore two distinct directions. One is to abandon the assumption of DM electric neutrality in favor of absolutely stable, millicharged DM candidates which are part of SU(2){sub L} multiplets with integer isospin. Another possibility is to lower the cutoff of the model, which was originally fixed at the Planck scale, to allow for DM decays. We find new viable MDM candidates and study their phenomenology in detail.

Authors:
 [1];  [2];  [3];  [4]
  1. Department of Physics and Astronomy, UCLA, 475 Portola Plaza, Los Angeles, CA 90095 (United States)
  2. (Italy)
  3. DAMTP, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)
  4. Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre et Marie Curie, 98 bis Boulevard Arago, Paris 75014 (France)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572069
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 04; Other Information: PUBLISHER-ID: JCAP04(2016)048; OAI: oai:repo.scoap3.org:15366; 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:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FERMIONS; GAMMA RADIATION; ISOSPIN; NONLUMINOUS MATTER; PARTICLE DECAY; PARTICLE MULTIPLETS; SCALAR FIELDS; SCALAR MESONS; SU-2 GROUPS

Citation Formats

Nobile, Eugenio Del, Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova and INFN, Sezione di Padova,Via Marzolo 8, 35131 Padova, Nardecchia, Marco, and Panci, Paolo. Millicharge or decay: a critical take on Minimal Dark Matter. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/04/048.
Nobile, Eugenio Del, Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova and INFN, Sezione di Padova,Via Marzolo 8, 35131 Padova, Nardecchia, Marco, & Panci, Paolo. Millicharge or decay: a critical take on Minimal Dark Matter. United States. doi:10.1088/1475-7516/2016/04/048.
Nobile, Eugenio Del, Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova and INFN, Sezione di Padova,Via Marzolo 8, 35131 Padova, Nardecchia, Marco, and Panci, Paolo. Tue . "Millicharge or decay: a critical take on Minimal Dark Matter". United States. doi:10.1088/1475-7516/2016/04/048.
@article{osti_22572069,
title = {Millicharge or decay: a critical take on Minimal Dark Matter},
author = {Nobile, Eugenio Del and Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova and INFN, Sezione di Padova,Via Marzolo 8, 35131 Padova and Nardecchia, Marco and Panci, Paolo},
abstractNote = {Minimal Dark Matter (MDM) is a theoretical framework highly appreciated for its minimality and yet its predictivity. Of the two only viable candidates singled out in the original analysis, the scalar eptaplet has been found to decay too quickly to be around today, while the fermionic quintuplet is now being probed by indirect Dark Matter (DM) searches. It is therefore timely to critically review the MDM paradigm, possibly pointing out generalizations of this framework. We propose and explore two distinct directions. One is to abandon the assumption of DM electric neutrality in favor of absolutely stable, millicharged DM candidates which are part of SU(2){sub L} multiplets with integer isospin. Another possibility is to lower the cutoff of the model, which was originally fixed at the Planck scale, to allow for DM decays. We find new viable MDM candidates and study their phenomenology in detail.},
doi = {10.1088/1475-7516/2016/04/048},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 04,
volume = 2016,
place = {United States},
year = {Tue Apr 26 00:00:00 EDT 2016},
month = {Tue Apr 26 00:00:00 EDT 2016}
}