Calculations of neutralinostop coannihilation in the CMSSM
Abstract
We present detailed calculations of the χ~t~_{1} coannihilation channels that have the largest impact on the relic /χ~ density in the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which scalar masses m_{0}, gaugino masses m_{1/2} and the trilinear soft supersymmetrybreaking parameters A_{0} are each assumed to be universal at some input grand unification scale. The most important t~_{1}t~_{1}^{*} and t~_{1}t~_{1} annihilation channels are also calculated, as well as t~_{1}l~ coannihilation channels. We illustrate the importance of these new coannihilation calculations when A_{0} is relatively large. While they do not increase the range of m_{1/2} and hence m_{χ} allowed by cosmology, these coannihilation channels do open up new `tails' of parameter space extending to larger values of m_{0}.
 Publication:

Astroparticle Physics
 Pub Date:
 January 2003
 DOI:
 10.1016/S09276505(02)001512
 arXiv:
 arXiv:hepph/0112113
 Bibcode:
 2003APh....18..395E
 Keywords:

 High Energy Physics  Phenomenology;
 Astrophysics
 EPrint:
 45 pages, 7 figures