We consider the prospect of lightest neutralino (${\tilde{\chi }}_1^0$) as a dark matter candidate in light of recent interesting observations from the XENON100 and CDMS-II experiments in minimal supergravity framework with large $\tan \beta$ and nonvanishing $A_0$. Within the WMAP satisfied zone, there is a large direct detection reach of lighter ${\tilde{\chi }}_1^0$ in the lighter Higgs boson mediated resonance annihilation domain of the above scenario. It is seen that the heavier Higgs boson plays a dominating role in the ${\tilde{\chi }}_1^0-p$ cross section in the associated zone of parameter space in spite of having a larger mass. Possible LHC signatures are discussed.

• Received 28 June 2010

DOI:https://doi.org/10.1103/PhysRevD.82.075013