Search for gluinos and squarks using like-sign dileptons in {ovr p}p collisions at {radical}{ovr s}= 1.8 TeV.

We present results of the first search for like-sign dilepton ( e{sup {+-}}e{sup {+-}}, e{sup {+-}}{mu}{sup {+-}}, {mu}{sup {+-}}{mu}{sup {+-}}) events associated with multijets and large missing energy using 10{sup 6} pb{sup -1} of data in p{bar p} collisions at sqrt[s] = 1.8 TeV collected during 1992-1995 by the CDF experiment. Finding no events that pass our selection, we examine pair production of gluinos ( g'') and squarks ( q'') in a constrained framework of the minimal supersymmetric standard model. At tan{eta} = 2 and {mu} = -800 GeV/c{sup 2}, we set 95% confidence level limits of M{sub g}>221 GeV/c2 for M{sub g}{approx}M{sub q}, and M{sub g}>168 GeV/c2 for {sub q}>>{sub g}, both with small variation as a function of {mu}.