tWH associated production at the LHC
Name
Demartin2017_Article_TWHAssociatedProductionAtTheLH.pdf
Size
2.17 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Demartin, Federico
Maier, Benedikt
Maltoni, Fabio
Mawatari, Kentarou
Zaro, Marco
Date Issued
January 2017
Journal
The European Physical Journal C
Publisher
European Physical Journal C: Particles and Fields
Citation
Demartin, Federico, Benedikt Maier, Fabio Maltoni, Kentarou Mawatari, and Marco Zaro. “tWH Associated Production at the LHC.” The European Physical Journal C 77, no. 1 (January 2017).
Version
Final published version
Abstract
We study Higgs boson production in association with a top quark and a W boson at the LHC. At NLO in QCD, tWH interferes with tt¯ H and a procedure to meaningfully separate the two processes needs to be employed. In order to define tWH production for both total rates and differential distributions, we consider the diagram removal and diagram subtraction techniques that have been previously proposed for treating intermediate resonances at NLO, in particular in the context of tW production. These techniques feature approximations that need to be carefully taken into account when theoretical predictions are compared to experimental measurements. To this aim, we first critically revisit the tW process, for which an extensive literature exists and where an analogous interference with tt¯ production takes place. We then provide robust results for total and differential cross sections for tW and tWH at 13 TeV, also matching short-distance events to a parton shower. We formulate a reliable prescription to estimate the theoretical uncertainties, including those associated to the very definition of the process at NLO. Finally, we study the sensitivity to a non-Standard-Model relative phase between the Higgs couplings to the top quark and to the W boson in tWH production.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-017-4601-7
