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High Energy Physics - Phenomenology

arXiv:1503.01119 (hep-ph)
[Submitted on 3 Mar 2015 (v1), last revised 6 Jul 2015 (this version, v3)]

Title:Minimal Asymmetric Dark Matter

Authors:Sofiane M. Boucenna, Martin B. Krauss, Enrico Nardi
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Abstract:In the early Universe, any particle carrying a conserved quantum number and in chemical equilibrium with the thermal bath will unavoidably inherit a particle-antiparticle asymmetry. A new particle of this type, if stable, would represent a candidate for asymmetric dark matter (DM) with an asymmetry directly related to the baryon asymmetry. We study this possibility for a minimal DM sector constituted by just one (generic) $SU(2)_L$ multiplet $\chi$ carrying hypercharge, assuming that at temperatures above the electroweak phase transition an effective operator enforces chemical equilibrium between $\chi$ and the Higgs boson. We argue that limits from DM direct detection searches severely constrain this scenario, leaving as the only possibilities scalar or fermion multiplets with hypercharge $y = 1$, preferentially quintuplets or larger $SU(2)$ representations, and with a mass in the few TeV range.
Comments: 9 pages, 2 figures, included t-channel scattering, added details on charged-neutral mass splitting and indirect detection, accepted in PLB
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1503.01119 [hep-ph]
  (or arXiv:1503.01119v3 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1503.01119
Related DOI: https://doi.org/10.1016/j.physletb.2015.06.080

Submission history

From: Martin Bernhard Krauss [view email]
[v1] Tue, 3 Mar 2015 21:00:16 UTC (72 KB)
[v2] Mon, 23 Mar 2015 19:19:41 UTC (64 KB)
[v3] Mon, 6 Jul 2015 11:29:13 UTC (66 KB)
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