Global fit of top quark effective theory to data

Buckley, A. , Englert, C. , Ferrando, J., Miller, D. J. , Moore, L., Russell, M. and White, C. D. (2015) Global fit of top quark effective theory to data. Physical Review D, 92, 091501. (doi: 10.1103/PhysRevD.92.091501)

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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.

Item Type:Articles
Additional Information:Other funding includes: AB is supported by a Royal Society University Research Fellowship. CE is supported by the IPPP Associateship programme. DJM, LM, MR and CDW are supported by the UK Science and Technology Facilities Council (STFC) under grant ST/L000446/1.
Glasgow Author(s) Enlighten ID:Ferrando, Dr James and White, Dr Christopher and Russell, Mr Michael and Englert, Professor Christoph and Miller, Dr David and Buckley, Professor Andy
Authors: Buckley, A., Englert, C., Ferrando, J., Miller, D. J., Moore, L., Russell, M., and White, C. D.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN (Online):1550-2368
Copyright Holders:Copyright © 2015 American Physical Society
First Published:First published in Physical Review D 92: 091501(R)
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
600011Experimental Particle PhysicsAnthony DoyleScience & Technologies Facilities Council (STFC)ST/K001205/1P&A - PHYSICS & ASTRONOMY