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Durham University

Centre for Particle Theory

Research Staff

Publication details for Johannes Schlenk

Heinrich, Gudrun, Maier, Andreas, Nisius, Richard, Schlenk, Johannes, Schulze, Markus, Scyboz, Ludovic & Winter, Jan (2018). NLO and off-shell effects in top quark mass determinations. Journal of High Energy Physics 2018(7): 129.

Author(s) from Durham


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.