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


Cascioli, Fabio; Kallweit, Stefan; Maierhoefer, Philipp; Pozzorini, Stefano (2014). A unified NLO description of top-pair and associated Wt production. European Physical Journal C - Particles and Fields, C74(3):2783.

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.

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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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2014
Deposited On:25 Feb 2015 11:50
Last Modified:27 Apr 2017 23:45
Publisher:Springer
ISSN:1434-6044
Publisher DOI:https://doi.org/10.1140/epjc/s10052-014-2783-9

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