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arXiv · 1312.0546

A unified NLO description of top-pair and associated Wt production

F. Cascioli·S. Kallweit·P. Maierhöfer·S. Pozzorini
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Abstract

We present an NLO simulation of WWbb production with massive b-quarks at the LHC. Off-shell and non-resonant contributions associated with top-pair and single-top channels and with leptonic W-boson decays are consistently taken into account using the complex-mass scheme. Thanks to the finite b-quark mass, WWbb predictions can be extended to the whole b-quark phase space, thereby including Wt-channel single-top contributions that originate from collinear g->bb splittings in the four-flavour scheme. This provides a consistent NLO description of tt and Wt production and decay, including quantum interference effects. The simulation is also applicable to exclusive 0- and 1-jet bins, which is of great importance for Higgs-boson studies in the H->WW channel and for any other analysis with large top backgrounds and jet vetoes or jet bins.

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F. Cascioli, S. Kallweit, P. Maierhöfer, S. Pozzorini. 2014-01-20. A unified NLO description of top-pair and associated Wt production. https://doi.org/10.1140/epjc%2Fs10052-014-2783-9

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