Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-06-15
JHEP 0908:080,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages with 10 .eps figures; this version contains low resolution figures; this version is slightly updated
Scientific paper
10.1088/1126-6708/2009/08/080
We examine the minimal supergravity (mSUGRA) model under the assumption that the strong CP problem is solved by the Peccei-Quinn mechanism. In this case, the relic dark matter (DM) abundance consists of three components: {\it i}). cold axions, {\it ii}). warm axinos from neutralino decay, and {\it iii}). cold or warm thermally produced axinos. To sustain a high enough re-heat temperature (T_R\agt 10^6 GeV) for many baryogenesis mechanisms to function, we find that the bulk of DM should consist of cold axions, while the admixture of cold and warm axinos should be rather slight, with a very light axino of mass \sim 100 keV. For mSUGRA with mainly axion cold DM (CDM), the most DM-preferred parameter space regions are precisely those which are least preferred in the case of neutralino DM. Thus, rather different SUSY signatures are expected at the LHC in the case of mSUGRA with mainly axion CDM, as compared to mSUGRA with neutralino CDM.
Baer Howard
Box Andrew D.
Summy Heaya
No associations
LandOfFree
Mainly axion cold dark matter in the minimal supergravity model 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 Mainly axion cold dark matter in the minimal supergravity model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mainly axion cold dark matter in the minimal supergravity model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-315487