ONE-LOOP CORRECTIONS FOR MU+MU- ANNIHILATION INTO MU+MU- IN THE WEINBERG MODEL

Analytical experessions for the e+e- → μ+μ- cross section including all the one-loop radiative corrections in the context of the Weinberg model are presented. The systematic calculation of one-loop diagrams has been carried out using a recently proposed scheme. Numerical results are shown in a region from 40-200 GeV c.m. energy and different values of the scattering angle; they indicate that the percentage corrections are mainly due to soft photons. The only departure from QED-like correction can be seen in a region where the lowest-order cross section is lowered by weak-e.m. interference. In that region hard photon contributions are relatively prominent and perhaps within experimental possibilities. © 1979.