The O(G(mu)2 m(t)4) correction to the rho parameter is computed using the current algebra formulation of radiative corrections. This approach is proved to be equivalent to the effective Lagrangian method proposed by Barbieri et al. The same framework is then applied to the calculation of the O(G(mu)2 m(t)2 m(z)2) correction to the of neutral-to-charged-current amplitudes in an SU(2) model. In this model the O(G(mu)2m(t)2m(z)2) contribution is shown to be numerically comparable to the leading O(G(mu)2m(t)4) term for realistic values of the top mass.
Degrassi, G., Fanchiotti, S., Gambino, P. (1995). CURRENT-ALGEBRA APPROACH TO HEAVY TOP EFFECTS IN DELTA-RHO. INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 10(9), 1377-1392 [10.1142/S0217751X95000668].
CURRENT-ALGEBRA APPROACH TO HEAVY TOP EFFECTS IN DELTA-RHO
DEGRASSI, GIUSEPPE;
1995-01-01
Abstract
The O(G(mu)2 m(t)4) correction to the rho parameter is computed using the current algebra formulation of radiative corrections. This approach is proved to be equivalent to the effective Lagrangian method proposed by Barbieri et al. The same framework is then applied to the calculation of the O(G(mu)2 m(t)2 m(z)2) correction to the of neutral-to-charged-current amplitudes in an SU(2) model. In this model the O(G(mu)2m(t)2m(z)2) contribution is shown to be numerically comparable to the leading O(G(mu)2m(t)4) term for realistic values of the top mass.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
