Screened-Coulomb ansatz for the nonfactorizable radiative corrections to off-shell W+W- production
1 Instituut-Lorentz, University of Leiden, The Netherlands
2 INFN-Laboratori Nazionali di Frascati, P.O. Box 13, I-00044 Frascati (Roma), Italy (e-mail: email@example.com)
Received: 15 February 1999 / Published online: 18 June 1999
We demonstrate that the results of the complete first-order calculation of the nonfactorizable QED corrections to the single-inclusive cross sections for fermions can be reproduced by a simple, physically motivated ansatz. The ansatz allows us to effectively take into account the screening role of the non-Coulomb radiative mechanisms by introducing a dampening factor in front of the width-dependent part of the known first-order Coulomb correction, the so-called screened-Coulomb ansatz.