Bounds on Scalar Leptoquarks from Z Physics
J. K. Mizukoshi, O. J. P. Eboli, M. C. Gonzalez-Garcia
Abstract
We analyse the constraints on scalar leptoquarks coming from radiative corrections to Z physics. We perform a global fitting to the LEP data including the contributions of the most general effective Lagrangian for scalar leptoquarks, which exhibits the SU(2)L × U(1)Y gauge invariance. We show that the bounds on leptoquarks that couple to the top quark are much stronger than the ones obtained from low energy experiments.
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