Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-08-07
JHEP0412:048,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
Final version to appear in JHEP. References added. LaTeX, 53 pages, 23 figures
Scientific paper
10.1088/1126-6708/2004/12/048
We analyse the direct detection of neutralino dark matter in the framework of the Next-to-Minimal Supersymmetric Standard Model. After performing a detailed analysis of the parameter space, taking into account all the available constraints from LEPII, we compute the neutralino-nucleon cross section, and compare the results with the sensitivity of detectors. We find that sizable values for the detection cross section, within the reach of dark matter detectors, are attainable in this framework. For example, neutralino-proton cross sections compatible with the sensitivity of present experiments can be obtained due to the exchange of very light Higgses with $m_{h_1^0}\lsim 70$ GeV. Such Higgses have a significant singlet composition, thus escaping detection and being in agreement with accelerator data. The lightest neutralino in these cases exhibits a large singlino-Higgsino composition, and a mass in the range $50\lsim m_{\tilde\chi_1^0}\lsim 100$ GeV.
Cerdeno David G.
Hugonie Cyril
Lopez-Fogliani Daniel E.
Munoz Carlos
Teixeira Ana M.
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