We consider two polarization asymmetries in the process of top-antitop production at LHC. We show that the theoretical predictions for these two quantities, at the strong and electroweak partonic one-loop level, are free of QCD and QED effects. At this perturbative level we derive two sum rules, that relate measurable quantities of top-antitop production to genuinely weak inputs. This would allow to perform two independent tests of the candidate theoretical model, with a precision that will be fixed by the future experimental accuracies of the different polarization measurements. A tentative quantitative illustration of this statement for a specific MSSM scenario is enclosed, and a generalization to include two other future realistic measurements is also proposed.
@article{arxiv.hep-ph/0506230,
title = {Weak Interaction Sum Rules for Polarized top-antitop Production at LHC},
author = {M. Beccaria and F. M. Renard and C. Verzegnassi},
journal= {arXiv preprint arXiv:hep-ph/0506230},
year = {2008}
}