F. Abe et al., SEARCH FOR FIRST-GENERATION LEPTOQUARK PAIR PRODUCTION IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8-TEV, Physical review letters, 79(22), 1997, pp. 4327-4332
We present the results of a search for first generation scalar leptoqu
arks pairs (S-1 (S)over-bar(1)) in 110 +/- 7 pb(-1) of data collected
by the Collider Detector at Fermilab. We assume both leptoquarks decay
to an electron and a quark. Three candidate events, with masses below
140 GeV/c(2) and consistent with background expectations, are observe
d. We obtain a 95% confidence level upper limit on the production cros
s section as a function of the leptoquark mass. Using a next-to-leadin
g order calculation of S-1 (S)over-bar(1) production, we exclude scala
r leptoquarks with mass less than 213 GeV/c(2) at 95% C.L. for a branc
hing ratio into eq equal to 1.