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

Abstract

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‾→cX⁰₁, where X˜⁰₁ 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˜‾,mX˜⁰₁) plane has been determined, extending the domain excluded by previous experiments.