Search for Light Top Squarks in $p \bar{p}$ Collisions at $\sqrt s = 1.8$ TeV

We present a search for pair produced top squarks, the supersymmetric partners of the top quark, using the D0 detector at the Fermilab Tevatron

p \bar{p}

collider. We consider a scenario in which the lighter of the two top squarks

{\tilde{t}}_{1}

decays with 100% branching fraction to a charm quark and the lightest neutralino

{\tilde{χ}}_{1}^{0}

yielding a signal of two acollinear jets with missing transverse energy. We observe 3 events while we expect

3.5 \pm 1.2

events from the known standard model processes. We exclude at the 95% confidence level a significant region of the

m_{{\tilde{t}}_{1}}

m_{{\tilde{χ}}_{1}^{0}}

parameter space. The highest

m_{{\tilde{t}}_{1}}

value we exclude is

93 GeV {/ c}^{2}

with a corresponding

m_{{\tilde{χ}}_{1}^{0}}

value of

8 G e V / c^{2}

This publication has 14 references indexed in Scilit:

Search for Light Top Squarks inpp¯Collisions at√s=1.8TeV