Report

PUBDB-2022-07047

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurements of Z$\gamma\, +$ jets differential cross sections in $pp$ collisions at $\sqrt{s}$ =13 TeV with the ATLAS detector

ATLAS Collaboration (Collaboration author)DESY*

2022

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Please use a persistent id in citations: doi:10.3204/PUBDB-2022-07047

Report No.: ATLAS-CONF-2022-047

Abstract: Differential cross-section measurements of $Z\gamma$ production in association with hadronic jets are presented, using the full Run-2 proton-proton dataset of 139 fb$^{-1}$ produced by the LHC at $\sqrt{s}$ = 13 TeV and collected by the ATLAS detector. Distributions are measured using events in which the $Z$ boson decays leptonically and the photon is predominantly radiated off the initial state quarks. Both one- and two-dimensional observables are considered, including observables sensitive to the hard scatter in the event and observable which probe additional soft and collinear radiation. The measurements are compared to different Standard Model predictions, both parton-shower Monte-Carlo simulation and fixed-order QCD calculations. General good agreement is observed between data and state-of-the art theoretical next-to-next-leading-order predictions $\mathbf{MATRIX/MiNNLO}$$_{PS}$ and with $\mathbf{M{\small{AD}}G\small{RAPH}}5$_a$\mathbf{MC@NLO}$ and $S\small{HERPA}$ multilegnext-to-leading order generators.

Keyword(s): p p: colliding beams ; Z0: associated production ; photon: associated production ; jet: associated production ; radiation: initial-state interaction ; Z0: leptonic decay ; numerical calculations: Monte Carlo ; quantum chromodynamics: perturbation theory ; perturbation theory: higher-order ; higher-order: 1 ; higher-order: 2 ; boson: decay ; jet: hadronic ; p p: scattering ; ATLAS ; differential cross section: measured ; transverse momentum dependence ; multiplicity: dependence ; jet: multiplicity ; mass dependence ; angular dependence ; initial state ; collinear ; CERN LHC Coll ; experimental results ; 13000 GeV-cms ; Standard Model ; pQCD ; Z boson ; gamma ; Zgamma ; jets

Note: Preliminary results. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2022-047. The authors list may be incomplete!

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Contributing Institute(s):

1. LHC/ATLAS Experiment (ATLAS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. LHC: ATLAS

Appears in the scientific report 2022

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