Search for the pair production of scalar top quarks in the acoplanar charm jet final state in pp¯ collisions at s=1.96 TeV

A search for the pair production of scalar top quarks, t˜, has been performed in 360 pb−1 of data from pp¯ collisions at a center-of-mass energy of 1.96 TeV, collected by the DØ detector at the Fermilab Tevatron collider. The t˜ decay mode considered is t˜→cχ˜10, where χ˜10 is the lightest supersymmetric particle. The topology analyzed therefore consists of a pair of acoplanar heavy-flavor jets with missing transverse energy. The data and standard model expectation are in agreement, and a 95% C.L. exclusion domain in the (mt˜,mχ˜10) plane has been determined, extending the domain excluded by previous experiments.