Anomalous couplings in Zγ events at NNLO+PS and improving νν¯γ backgrounds in dark-matter searches

Daniele Lombardi, Marius Wiesemann, Giulia Zanderighi

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The measurement of the triple gauge couplings (TGCs) is a central part of diboson studies at the LHC. In this letter we consider the Zγ process and include anomalous TGCs (aTGCs) in the event generation at next-to-next-to-leading order QCD accuracy (NNLO+PS) within the MINNLOPS framework. While our implementation is fully general and applies to both Z→ℓ+ and Z→νν¯ decays, we focus here on the νν¯γ final state. After validation of our simulation of νν¯γ events, for which NNLO+PS accuracy is achieved for the first time, the effects of aTGCs on various distributions are studied. Moreover, we show the relevance of NNLO+PS accuracy for the νν¯γ background to photon plus missing energy signatures in dark-matter searches, and we compare MINNLOPS predictions for νν¯γ production to recent 13 TeV data.

Original languageEnglish
Article number136846
JournalPhysics Letters B
Volume824
DOIs
StatePublished - 10 Jan 2022
Externally publishedYes

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