Study of $ ilde{t}$ and $ ilde{b}$ at LHC

摘要

In supersymmetric models a gluino can decay into $tb ilde{e??’}^{e???}_{1}$ through a stop or a sbottom. The decay chain produces an edge structure in the $m_{tb}$ distribution. Monte Carlo simulation studies show that the end-point and the edge height would be measured at the CERN LHC by using a sideband subtraction technique. The stop and sbottom masses as well as their decay branching ratios are constrained by the measurement. We study interpretations of the measurement.