Search for the decays Bs 0, Bd 0 → e±μ∓ and Pati-Salam leptoquarks

We have searched for the decays B{sub s}{sup 0}{yields}e{sup {+-}}{mu}{sup {-+}} and B{sub d}{sup 0}{yields}e{sup {+-}}{mu}{sup {-+}} using a 102 pb{sup -1} data sample of p{ovr p} collisions at sqrt[s] = 1.8 TeV collected with the Collider Detector at Fermilab. We set upper limits on the branching fractions of B(B{sub s}{sup 0}{yields}e{sup {+-}}{mu}{sup {-+}}) 20.7(19.3) TeV/c{sup 2} and M{sub LQ}(B{sub d}{sup 0})>21.7(20.4) TeV/c{sup 2} at 90(95)% confidence level.