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Global fit of top quark effective theory to data

Andy Buckley, Christoph Englert, James Ferrando, David J. Miller, Liam Moore, Michael Russell, and Chris D. White
Phys. Rev. D 92, 091501(R) – Published 25 November 2015

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 all currently available top production cross-section measurements, namely parton-level top-pair and single top production at the LHC and the Tevatron. Higher order QCD corrections are modeled 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.

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  • Received 15 July 2015

DOI:https://doi.org/10.1103/PhysRevD.92.091501

© 2015 American Physical Society

Authors & Affiliations

Andy Buckley, Christoph Englert, James Ferrando, David J. Miller, Liam Moore, Michael Russell, and Chris D. White

  • SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom

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Issue

Vol. 92, Iss. 9 — 1 November 2015

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