Search for direct production of bottom squark pairs

This report presents a search for direct production of bottom squark pairs in proton-proton collision events at $\sqrt{s}=8$~TeV collected by the CMS experiment at the LHC in 2012. The data used correspond to an integrated luminosity of 19.4~fb$^{-1}$. This search is performed in a final state of two jets, at least one of which is tagged as originating from a b-quark, accompanied by large missing transverse momentum, as well as large transverse mass and contransverse mass calculated from the jets and missing transverse momentum. The observed data in the signal region are consistent with the standard model backgrounds predicted using data control samples. The results are interpreted in terms of a simplified model production of a pair of bottom squarks with each bottom squark decaying to a bottom quark and a weakly interacting stable neutral particle. The production of bottom squarks with mass up to 700~GeV is excluded at 95$\%$ confidence level for neutralino masses less than 50~GeV.