Search for ${\tilde{W}}_1{\tilde{Z}}_2$ Production via Trilepton Final States in $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV

Abstract

We have searched for associated production of the lightest chargino, ${\tilde{W}}_1$, and next-to-lightest neutralino, ${\tilde{Z}}_2$, of the Minimal Supersymmetric Standard Model in $p\bar{p}$ collisions at \mbox{$\sqrt{s}$ = 1.8 TeV} using the \D0 detector at the Fermilab Tevatron collider. Data corresponding to an integrated luminosity of 12.5$\pm 0.7$ \ipb were examined for events containing three isolated leptons. No evidence for ${\tilde{W}}_1{\tilde{Z}}_2$ pair production was found. Limits on $\sigma ({\tilde{W}}_1{\tilde{Z}}_2)$Br$({\tilde{W}}_1\to l\nu {\tilde{Z}}_1)$Br$({\tilde{Z}}_2\to l\bar{l}{\tilde{Z}}_1)$ are presented.

17 pages (13 + 1 page table + 3 pages figures). 3 PostScript figures will follow in a UUEncoded, gzip'd, tar file. Text in LaTex format. Submitted to Physical Review Letters. Replace comments - Had to resumbmit version with EPSF directives