Theoretical Predictions for the Direct Detection of Neutralino Dark Matter in the NMSSM

D. G. CERDEÑO, C. HUGONIE, D. E. LOPEZ -FOGLIANI, C. MUÑOZ, A. M. TEIXEIRA

JOURNAL OF HIGH ENERGY PHYSICS - (Online)

IOP & SISSA

Año: 2004 vol. 0412 p. 48 - 102

1029-8479

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 $m_{h^0_1} lesssim 70$~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 $50 lesssim m_{{chi_1}^0} lesssim100$ GeV.