S. Matsumoto

A novel approach to confront electroweak data and theory

AbstractA novel approach to study electroweak physics at one-loop level in generic SU(2)L×U(1)Y theories is introduced. It separates the 1-loop corrections into two pieces: process specific ones from vertex and box contributions, and universal ones from contributions to the gauge boson propagators. The latter are parametrized in terms of four effective form factorsn

One loop supersymmetric QCD radiative corrections to top quark production in p{bar p} collisions

bar e^2 (q^2 ), bar s^2 (q^2 ), bar g_Z^2 (q^2 )

Consequences of a possible [gamma][gamma] resonance at KEK TRISTAN

n andn

Consequences of a Possible Di-Gamma Resonace at TRISTAN

bar g_W^2 (q^2 )

Constraints on four-Fermi contact interactions from low-energy electroweak experiments

n corresponding to the γγ, γZ,ZZ andWW propagators. Under the assumption that only the Standard Model contributes to the process specific corrections, the magnitudes of the four form factors are determined atq2=0 and atq2=mZ2 by fitting to all available precision experiments. These values are then compared systematically with predictions of SU(2)L×U(1)Y theories. In all fits αs(mZ) andn