S. Kallweit
NLO QCD+EW predictions for 2ℓ2ν diboson signatures at the LHC
Kallweit, S.; Lindert, J.M.; Pozzorini, S.; Schoenherr, M.
Authors
Abstract
We present next-to-leading order (NLO) calculations including QCD and electroweak (EW) corrections for 2ℓ2ν diboson signatures with two opposite-charge leptons and two neutrinos. Specifically, we study the processes pp→e+μ−νeν¯¯¯μpp→e+μ−νeν¯μ and pp→e+e−νν¯¯¯pp→e+e−νν¯ , including all relevant off-shell diboson channels, W+W−, ZZ, γZ, as well as non-resonant contributions. Photon-induced processes are computed at NLO EW, and we discuss subtle differences related to the definition and the renormalisation of the coupling α for processes with initial- and final-state photons. All calculations are performed within the automated Munich/Sherpa+OpenLoops frameworks, and we provide numerical predictions for the LHC at 13 TeV. The behaviour of the corrections is investigated with emphasis on the high-energy regime, where NLO EW effects can amount to tens of percent due to large Sudakov logarithms. The interplay between W W and ZZ contributions to the same-flavour channel, pp→e+e−νν¯¯¯pp→e+e−νν¯ , is discussed in detail, and a quantitative analysis of photon-induced contributions is presented. Finally, we consider approximations that account for all sources of large logarithms, at high and low energy, by combining virtual EW corrections with a YFS soft-photon resummation or a QED parton shower.
Citation
Kallweit, S., Lindert, J., Pozzorini, S., & Schoenherr, M. (2017). NLO QCD+EW predictions for 2ℓ2ν diboson signatures at the LHC. Journal of High Energy Physics, 2017(11), Article 120. https://doi.org/10.1007/jhep11%282017%29120
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 11, 2017 |
Online Publication Date | Nov 20, 2017 |
Publication Date | Nov 20, 2017 |
Deposit Date | Dec 13, 2017 |
Publicly Available Date | Dec 13, 2017 |
Journal | Journal of High Energy Physics |
Print ISSN | 1126-6708 |
Publisher | Scuola Internazionale Superiore di Studi Avanzati (SISSA) |
Peer Reviewed | Peer Reviewed |
Volume | 2017 |
Issue | 11 |
Article Number | 120 |
DOI | https://doi.org/10.1007/jhep11%282017%29120 |
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Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
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