Eur. Phys. J. C (2007) 51: 585-591
https://doi.org/10.1140/epjc/s10052-007-0327-2

Category: Regular Article - Theoretical Physics

SANCnews: Sector 4f, charged current

¹ Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, 141980, Russia
² Dzhelepov Laboratory of Nuclear Problems, JINR, Dubna, 141980, Russia
³ IFJ, PAN, Krakow, Poland
⁴ PNPI, St. Petersburg, 188300, Russia

^* e-mail: arbuzov@theor.jinr.ru

Received: 5 March 2007
Published online: 12 June 2007

Abstract

In this paper we describe the implementation of the charged current decays of the type t→bl⁺ν_l(γ) in the framework of the SANC system. All calculations are done taking into account the one-loop electroweak correction in the standard model. The emphasis of this paper is on the presentation of numerical results. Various distributions are produced by means of a Monte Carlo integrator and event generator. Comparison with the results of the CompHEP and PYTHIA packages are presented for the Born and hard photon contributions. The validity of the cascade approximation at one-loop level is also studied.