A global fit of top quark effective theory to data
Abstract
In this paper we present a global fit of beyond the Standard Model (BSM) dimension six operators relevant to the top quark sector to currently available data. Experimental measurements include parton-level top-pair and single top production from the LHC and the Tevatron. Higher order QCD corrections are modelled using differential and global K-factors, and we use novel fast-fitting techniques developed in the context of Monte Carlo event generator tuning to perform the fit. This allows us to provide new, fully correlated and model-independent bounds on new physics effects in the top sector from the most current direct hadron-collider measurements in light of the involved theoretical and experimental systematics. As a by-product, our analysis constitutes a proof-of-principle that fast fitting of theory to data is possible in the top quark sector, and paves the way for a more detailed analysis including top quark decays, detector corrections and precision observables.
Keywords
Cite
@article{arxiv.1506.08845,
title = {A global fit of top quark effective theory to data},
author = {Andy Buckley and Christoph Englert and James Ferrando and David J. Miller and Liam Moore and Michael Russell and Chris D. White},
journal= {arXiv preprint arXiv:1506.08845},
year = {2015}
}
Comments
Additional references and preprint code added. Minor error in generation of plots fixed, no conclusions affected