NLO and off-shell effects in top quark mass determinations

Heinrich, Gudrun; Maier, Andreas; Nisius, Richard; Schlenk, Johannes; Schulze, Markus; Scyboz, Ludovic; Winter, Jan

Abstract

We study the impact of different theoretical descriptions of top quark pair production on top quark mass measurements in the di-lepton channel. To this aim, the full NLO corrections to pp→W+W−bb¯¯→(e+νe)(μ−ν¯¯¯μ)bb¯¯ production are compared to calculations in the narrow width approximation, where the production of a top quark pair is calculated at NLO and combined with three different descriptions of the top quark decay: leading order, next-to-leading order and via a parton shower. The different theory predictions then enter the calibration of template fit functions, which are used for a fit to pseudo-data. The offsets in the top quark mass resulting from the fits based on the various theoretical descriptions are determined.

Citation

Heinrich, G., Maier, A., Nisius, R., Schlenk, J., Schulze, M., Scyboz, L., & Winter, J. (2018). NLO and off-shell effects in top quark mass determinations. Journal of High Energy Physics, 2018(7), Article 129. https://doi.org/10.1007/jhep07%282018%29129

• Journal Article Type: Article
• Acceptance Date: Jul 16, 2018
• Online Publication Date: Jul 19, 2018
• Publication Date: Jul 19, 2018
• Deposit Date: Aug 2, 2018
• Publicly Available Date: Aug 2, 2018
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2018
• Issue: 7
• Article Number: 129
• DOI: https://doi.org/10.1007/jhep07%282018%29129
• Public URL: https://durham-repository.worktribe.com/output/1318579