Eur. Phys. J. C (2015) 75: 37
https://doi.org/10.1140/epjc/s10052-015-3266-3

Regular Article - Theoretical Physics

Top-quark polarization and asymmetries at the LHC in the effective description of squark interactions

Departamento de Física Teórica, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain

^* e-mail: ernesto.arganda@unizar.es

Received: 10 June 2014
Accepted: 11 January 2015
Published online: 29 January 2015

Abstract

A detailed study of top-quark polarizations and charge asymmetries, induced by top-squark-pair production at the LHC and the subsequent decays , is performed within the effective description of squark interactions, which includes the effective Yukawa couplings and another logarithmic term encoding the supersymmetry breaking. This effective approach is more suitable for its introduction into Monte-Carlo simulations and we make use of its implementation in MadGraph in order to investigate the possibilities of the charge asymmetry , measured at the LHC and consistent with SM expectations, to discriminate between different SUSY scenarios and analyze the implications of these scenarios in the top polarizations and related observables.