| Resumen |
We present a search for the pair production of scalar top quarks (t~1), the lightest supersymmetric partners of the top quarks, in pp- collisions at a center-of-mass energy of 1.96 TeV, using data corresponding to an integrated luminosity of 7.3fb -1 collected with the D0 experiment at the Fermilab Tevatron Collider. Each scalar top quark is assumed to decay into a b quark, a charged lepton, and a scalar neutrino (ν~). We investigate final states arising from t~1t~-1→bb-μτν~ν~ and t~1t~-1→bb-ττν~ν~. With no significant excess of events observed above the background expected from the standard model, we set exclusion limits on this production process in the (mt~1,mν~) plane. © 2012 Elsevier B.V. |
