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)Lmultiplets 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.

Millicharge or decay: A critical take on Minimal Dark Matter / Nobile, E. D.; Nardecchia, M.; Panci, P.. - In: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. - ISSN 1475-7516. - 2016:4(2016), pp. 048-048. [10.1088/1475-7516/2016/04/048]

Millicharge or decay: A critical take on Minimal Dark Matter

Nardecchia M.;
2016

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)Lmultiplets 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.
2016
dark matter experiments; dark matter theory; gamma ray experiments; gamma ray theory
01 Pubblicazione su rivista::01a Articolo in rivista
Millicharge or decay: A critical take on Minimal Dark Matter / Nobile, E. D.; Nardecchia, M.; Panci, P.. - In: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. - ISSN 1475-7516. - 2016:4(2016), pp. 048-048. [10.1088/1475-7516/2016/04/048]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1313210
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