Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/102777
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Type: Journal article
Title: Measurement of event-shape observables in Z→ ℓ⁺ℓ⁻ events in pp collisions at √s = 7 TeV with the ATLAS detector at the LHC
Other Titles: Measurement of event-shape observables in Z-> l(+)l(-) events in pp collisions at root s = 7 TeV with the ATLAS detector at the LHC
Author: Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Abeloos, B.
Aben, R.
Abolins, M.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
et al.
Citation: European Physical Journal C, 2016; 76(7):375-1-375-40
Publisher: Springer
Issue Date: 2016
ISSN: 1434-6044
1434-6052
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... M.J. White ... et al. (ATLAS Collaboration)
Abstract: Event-shape observables measured using charged particles in inclusive Z-boson events are presented, using the electron and muon decay modes of the Z bosons. The measurements are based on an integrated luminosity of 1.1 fb⁻¹ of proton–proton collisions recorded by the ATLAS detector at theLHCat a centre-of-mass energy √s = 7TeV.Chargedparticle distributions, excluding the lepton–antilepton pair from the Z-boson decay, are measured in different ranges of transverse momentum of the Z boson. Distributions include multiplicity, scalar sum of transverse momenta, beam thrust, transverse thrust, spherocity, and F-parameter, which are in particular sensitive to properties of the underlying event at small values of the Z-boson transverse momentum. The measured observables are compared with predictions from Pythia 8, Sherpa, and Herwig7. Typically, all three Monte Carlo generators provide predictions that are in better agreement with the data at high Z-boson transverse momenta than at low Z-boson transverse momenta, and for the observables that are less sensitive to the number of charged particles in the event.
Keywords: Atlas Collaboration; Atlas Collaboration; Atlas Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2016. This article is published with open access at Springerlink.com. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecomm ons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.
RMID: 0030054970
DOI: 10.1140/epjc/s10052-016-4176-8
Appears in Collections:Physics publications

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