Measurement of distributions sensitive to the underlying event in inclusive Z-boson production in pp collisions at √s = 13 TeV with the ATLAS detector

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Abstract

This paper presents measurements of charged-particle distributions sensitive to the properties of the underlying event in events containing a $Z$ boson decaying into a muon pair. The data were obtained using the ATLAS detector at the LHC in proton-proton collisions at a centre-of-mass energy of 13 TeV with an integrated luminosity of 3.2 fb$^{-1}$. Distributions of the charged-particle multiplicity and of the charged-particle transverse momentum are measured in regions of the azimuth defined relative to the $Z$ boson direction. The measured distributions are compared with the predictions of various Monte Carlo generators which implement different underlying-event models. The Monte Carlo model predictions qualitatively describe the data well, but with some significant discrepancies.
Original languageEnglish
Article number666
JournalEuropean Physical Journal C
VolumeC79
Issue number8
DOIs
Publication statusPublished - 8 Aug 2019

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