Neutralino Proton Cross Sections in SUGRA and D-BRANE Models

Abstract

We calculate the spin independent neutralino-proton cross section for universal SUGRA, non universal SUGRA and D-brane models with R-parity invariance. The regions of maximum cross section in these models has started to be probed by the current detectors. The minimum cross section generally is [Formula: see text] and hence will be accessible in the future detectors, barring special regions of parameter space where it can reduce to ≃10-12pb. However, the squarks and gluinos will be heavy [Formula: see text] in the latter case, but still accessible at the LHC.