Protohalo Constraints to the Resonant Annihilation of Dark Matter

Details Protohalo Constraints to the Resonant Annihilation of Dark Matter Protohalo Constraints to the Resonant Annihilation of Dark Matter

2009-04-27

arxiv.org/abs/0904.3933v2

Phys.Rev.D80:081302,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 4 figures; References added, estimates refined and discussion extended

Scientific paper

10.1103/PhysRevD.80.081302

It has recently been argued that the PAMELA, ATIC and PPB-BETS data showing an anomalous excess of high-energy cosmic ray positrons and electrons might be explained by dark matter annihilating in the Galactic halo with a cross section resonantly enhanced compared to its value in the primeval plasma. We find that with a very large annihilation cross section the flash of energetic photons and electron-positron pairs expected from dark-matter annihilation in the first protohalos that form at redshift z~40 is likely substantial and observable. As a consequence, bounds on the allowed energy injection into the primordial gas and the energy density of the diffuse gamma-ray background give rise to limits on the low-velocity dark matter cross section that can be difficult to reconcile with this interpretation of the PAMELA, ATIC and PPB-BETS results.

Affiliated with

Also associated with

No associations

Rating

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

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-321936