Abstract
Precision studies of the properties of the top quark represent a cornerstone of the LHC physics program. In this contribution we focus on the production of $t\bar{t}$ pairs in association with one hard jet and in particular on its connection with precision measurements of the top quark mass at the LHC. We report a summary of a full calculation of the process $pp \to e^+\nu_e\mu^-\bar{\nu}_\mu b \bar{b}j$ at NLO QCD accuracy, which describes $t\bar{t}j$ production with leptonic decays beyond the Narrow Width Approximation (NWA), and discuss the impact of the off-shell effects through comparisons with NWA. Finally we explore the sensitivity of $t\bar{t}j$ in the context of top-quark mass extraction with the template method, considering two benchmark observables as case studies.
Highlights
Durham Research OnlineCitation for published item: Bevilacqua, G. and Hartanto, H.B. and Kraus, M. and Schulze, M. and Worek, M. (2017) 'O-shell ttj production and top-quark mass studies at the Large Hadron Collider (LHC).', Acta physica Polonica B., 48 (12). pp. 2251-2260
With its unprecedented values of luminosity and center-of-mass energy, the Large Hadron Collider (LHC) has all the features of a top factory: ttevents are produced abundantly allowing to study the properties of top quarks with high precision
We discuss the impact of off-shell effects in ttj production and show selected results from our recent work [17], where we explore this channel in relation to the extraction of mt at the LHC Run 2, taking the viewpoint of a full calculation and comparing with different levels of on-shell approximations
Summary
Citation for published item: Bevilacqua, G. and Hartanto, H.B. and Kraus, M. and Schulze, M. and Worek, M. (2017) 'O-shell ttj production and top-quark mass studies at the LHC.', Acta physica Polonica B., 48 (12). pp. 2251-2260. The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:. A full bibliographic reference is made to the original source a link is made to the metadata record in DRO the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Durham University Library, Stockton Road, Durham DH1 3LY, United Kingdom Tel : +44 (0)191 334 3042 | Fax : +44 (0)191 334 2971 https://dro.dur.ac.uk
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