Automated third generation squark production to next-to-leading order

If light-flavor squarks and gluinos are indeed heavy and chargino pair production is plagued with overwhelming backgrounds, pair production and associated production of stops and charginos will become the key signatures in the upcoming LHC runs. We present fully automated next-to-leading order predictions for heavy flavor squark production at the LHC, including stop-chargino associated production, based on MadGolem. We compute the total and differential next-to-leading order rates for a variety of minimal supersymmetric standard model scenarios with a light third generation. We focus on theoretical uncertainties on differential rates, including a comparison to multijet merging and the impact of bottom parton densities for stop-chargino associated production. We find that for the associated production channel the rates can reach tens of femtobarns, but the scale dependence does not provide a conservative estimate of the theoretical uncertainties.

Publication year:2014

Keywords:Physics