Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-02-08
Phys.Rev. D72 (2005) 015003
Physics
High Energy Physics
High Energy Physics - Phenomenology
26 pages, 6 figures, 10 tables; version to appear in PRD
Scientific paper
10.1103/PhysRevD.72.015003
We compare results of four public supersymmetric (SUSY) spectrum codes, Isajet, Softsusy, Spheno and Suspect to estimate the present-day uncertainty in the calculation of the relic density of dark matter in mSUGRA models. We find that even for mass differences of about 1% the spread in the obtained relic densities can be 10%. In difficult regions of the parameter space, such as large tan(beta) or large m_0, discrepancies in the relic density are much larger. We also find important differences in the stau co-annihilation region. We show the impact of these uncertainties on the bounds from WMAP for several scenarios, concentrating on the regions of parameter space most relevant for collider phenomenology. We also discuss the case of non-zero A_0 and the stop co-annihilation region. Moreover, we present a web application for the online comparison of the spectrum codes.
Bélanger Guillaume
Kraml Sabine
Pukhov Alexander
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