Search for scalar top quarks in the acoplanar charm jets and missing transverse energy final state in pp̅ collisions at √s=1.96 TeV

Abstract

We present a search for the pair production of scalar top quarks, τ̅, using 995 pb^-1 of data collected in pp ̅collisions with the DO detector at the Fermilab Tevatron Collider at √=1.96 TeV. Both scalar top quarks are assumed to decay into a charm quark and a neutralino (Χ̅ ⁰₁), where is the lightest supersymmetric particle. This leads to a final state with two acoplanar charm jets and missing transverse energy. We find the yield of such events to be consistent with the standard model expectation, and exclude sets of τ̅and Χ̅ ⁰₁masses at the 95% C.L. that substantially extend the domain excluded by previous searches.