Energy of W distribution in top quark decays

Abstract

A relatively simple analytical formula is derived for the energy spectrum of $W$ boson in top quark decays $t\to Wb$ including ${\cal O}(α_s)$ radiative corrections. We discuss the accuracy of this formula and compare it to a more general albeit more complicated one derived in \cite{CJK}~. A Monte Carlo algorithm for generation of $W$ energy spectrum is briefly described.

Karlsruhe Univ. preprint TTP 93-20, 8p., 2 figures not included