Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-01-03
Lect.Notes PHys.720:3-34,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
32 pages including 6 figures, uses svmult.cls, some clarifications added, lectures given at the Third Aegean Summer School "Th
Scientific paper
10.1007/978-3-540-71013-4_1
We review the main proposals of particle physics for the composition of the cold dark matter in the universe. Strong axion contribution to cold dark matter is not favored if the Peccei-Quinn field emerges with non-zero value at the end of inflation and the inflationary scale is superheavy since, under these circumstances, it leads to unacceptably large isocurvature perturbations. The lightest neutralino is the most popular candidate constituent of cold dark matter. Its relic abundance in the constrained minimal supersymmetric standard model can be reduced to acceptable values by pole annihilation of neutralinos or neutralino-stau coannihilation. Axinos can also contribute to cold dark matter provided that the reheat temperature is adequately low. Gravitinos can constitute the cold dark matter only in limited regions of the parameter space. We present a supersymmetric grand unified model leading to violation of Yukawa unification and, thus, allowing an acceptable b-quark mass within the constrained minimal supersymmetric standard model with mu>0. The model possesses a wide range of parameters consistent with the data on the cold dark matter abundance as well as other phenomenological constraints. Also, it leads to a new version of shifted hybrid inflation.
No associations
LandOfFree
Particle Physics Approach to 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 Particle Physics Approach to Dark Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Particle Physics Approach to Dark Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-491073