Dark Matter with Dirac and Majorana Gaugino Masses

Details Dark Matter with Dirac and Majorana Gaugino Masses Dark Matter with Dirac and Majorana Gaugino Masses

2009-05-07

arxiv.org/abs/0905.1043v2

JCAP 0908:027,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

43 pages, 5 figures; one reference added. Corresponds to published version in JCAP

Scientific paper

10.1088/1475-7516/2009/08/027

We consider the minimal supersymmetric extension of the Standard Model allowing both Dirac and Majorana gauginos. The Dirac masses are obtained by pairing up extra chiral multiplets: a singlet S for U(1)_Y, a triplet T for SU(2) and an octet O for SU(3) with the respective gauginos. The electroweak symmetry breaking sector is modified by the couplings of the new fields S and T to the Higgs doublets. We discuss two limits: i) both the adjoint scalars are decoupled with the main effect being the modification of the Higgs quartic coupling; ii) the singlet remaining light, and due to its direct coupling to sfermions, providing a new contribution to the soft masses and inducing new decay/production channels. We discuss the LSP in this scenario; after mentioning the possibility that it may be a Dirac gravitino, we focus on the case where it is identified with the lightest neutralino, and exhibit particular values of the parameter space where the relic density is in agreement with WMAP data. This is illustrated for different scenarios where the LSP is either a bino (in which case it can be a Dirac fermion) or bino-higgsino/wino mixtures. We also point out in each case the peculiarity of the model with respect to dark matter detection experiments.

Affiliated with

Also associated with

No associations

Rating

Dark Matter with Dirac and Majorana Gaugino Masses does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dark Matter with Dirac and Majorana Gaugino Masses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dark Matter with Dirac and Majorana Gaugino Masses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-455760