Oscillating Asymmetric Dark Matter

Details Oscillating Asymmetric Dark Matter Oscillating Asymmetric Dark Matter

2012-02-01

arxiv.org/abs/1202.0283v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 4 figures, A typo fixed, References added

Scientific paper

We study the dynamics of dark matter (DM) particle-antiparticle oscillations within the context of asymmetric DM. Oscillations arise due to small DM number-violating Majorana-type mass terms, and can lead to recoupling of annihilation after freeze-out and washout of the DM density. We derive the density matrix equations for DM oscillations and freeze-out from first principles using nonequilibrium field theory, and our results are qualitatively different than in previous studies. DM dynamics exhibits particle-vs-antiparticle "flavor" effects, depending on the interaction type, analogous to neutrino oscillations in a medium. "Flavor-sensitive" DM interactions include scattering or annihilation through a new vector boson, while "flavor-blind" interactions include scattering or s-channel annihilation through a new scalar boson, or annihilation to pairs of bosons. In particular, we find that flavor-sensitive annihilation does not recouple when coherent oscillations begin, and that flavor-blind scattering does not lead to decoherence.

Affiliated with

Also associated with

No associations

Rating

Oscillating Asymmetric Dark Matter 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 Oscillating Asymmetric Dark Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillating Asymmetric Dark Matter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-186250