Eur. Phys. J. C 20, 217-225
DOI: 10.1007/s100520100673

Higher-order QED corrections to single-W production in electron-positron collisions

G. Montagna¹, M. Moretti², O. Nicrosini³, A. Pallavicini¹ and F. Piccinini<sup>3

1</sup>  Dipartimento di Fisica Nucleare e Teorica, Università di Pavia and INFN, Sezione di Pavia, via A. Bassi 6, 27100 Pavia, Italy
²  Dipartimento di Fisica, Università di Ferrara and INFN, Sezione di Ferrara, Ferrara, Italy
³  INFN, Sezione di Pavia and Dipartimento di Fisica Nucleare e Teorica, Università di Pavia, via A. Bassi 6, 27100 Pavia, Italy

(Received: 5 October 2000 / Published online: 11 May 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )

Abstract
Four-fermion processes with a particle lost in the beam pipe are studied at LEP to perform precision tests of the electroweak theory. Leading higher-order QED corrections to such processes are analyzed within the framework of the structure function (SF) approach. The energy scale entering the QED SF is determined by inspection of the soft and collinear limit of the radiative corrections to the four-fermion final states, paying particular attention to the process of single-W production. Numerical predictions are shown in realistic situations for LEP experiments and compared with existing results. A Monte Carlo event generator, including exact tree-level matrix elements, vacuum polarization, higher-order leading QED corrections and anomalous trilinear gauge couplings, is presented.

© Società Italiana di Fisica, Springer-Verlag 2001