Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-06-03
Physics
High Energy Physics
High Energy Physics - Phenomenology
33 pages, 12 figures, comments and references added, version to appear in JCAP
Scientific paper
We study the production of gamma rays via LSP annihilations in the core of the Galaxy as a possible experimental signature of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which supersymmetry-breaking parameters are assumed to be universal at the GUT scale, assuming also that the LSP is the lightest neutralino chi. The part of the CMSSM parameter space that is compatible with the measured astrophysical density of cold dark matter is known to include a stau_1 - chi coannihilation strip, a focus-point strip where chi has an enhanced Higgsino component, and a funnel at large tanb where the annihilation rate is enhanced by the poles of nearby heavy MSSM Higgs bosons, A/H. We calculate the total annihilation rates, the fractions of annihilations into different Standard Model final states and the resulting fluxes of gamma rays for CMSSM scenarios along these strips. We observe that typical annihilation rates are much smaller in the coannihilation strip for tanb = 10 than along the focus-point strip or for tanb = 55, and that the annihilation branching ratios differ greatly between the different dark matter strips. Whereas the current Fermi-LAT data are not sensitive to any of the CMSSM scenarios studied, and the calculated gamma-ray fluxes are probably unobservably low along the coannihilation strip for tanb = 10, we find that substantial portions of the focus-point strips and rapid-annihilation funnel regions could be pressured by several more years of Fermi-LAT data, if understanding of the astrophysical background and/or systematic uncertainties can be improved in parallel.
Ellis John
Olive Keith A.
Spanos Vassilis C.
No associations
LandOfFree
Galactic-Centre Gamma Rays in CMSSM Dark Matter Scenarios 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 Galactic-Centre Gamma Rays in CMSSM Dark Matter Scenarios, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galactic-Centre Gamma Rays in CMSSM Dark Matter Scenarios will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-6953