Aad, G. and Abbott, B. and Abdallah, J. and Abdinov, O. and Abeloos, B. and Krasznahorkay, Attila and Pásztor, Gabriella and Tóth, József (2016) Measurement of event-shape observables in Z->l+l- events in pp collisions at √s=7 TeV with the ATLAS detector at the LHC. EUROPEAN PHYSICAL JOURNAL C, 76 (7). ISSN 1434-6044
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Abstract
Event-shape observables measured using charged particles in inclusive Z-boson events arepresented, using the electron and muon decay modes of the Z bosons. The measurementsare based on an integrated luminosity of 1.1 fb−1 of proton–proton collisions recorded bythe ATLAS detector at the LHC at a centre-of-mass energy √s=7 TeV. Charged-particledistributions, excluding the lepton–antilepton pair from the Z-boson decay, are measuredin different ranges of transverse momentum of the Z boson. Distributions include multi-plicity, scalar sum of transverse momenta, beam thrust, transverse thrust, spherocity, andF -parameter, which are in particular sensitive to properties of the underlying event at smallvalues of the Z-boson transverse momentum. The measured observables are compared withpredictions from Pythia 8, Sherpa, and Herwig 7. Typically, all three Monte Carlo generat-ors provide predictions that are in better agreement with the data at high Z-boson transversemomenta than at low Z-boson transverse momenta, and for the observables that are lesssensitive to the number of charged particles in the event.
Item Type: | Article |
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Subjects: | Q Science / természettudomány > QC Physics / fizika |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 22 Aug 2023 13:29 |
Last Modified: | 22 Aug 2023 13:29 |
URI: | http://real.mtak.hu/id/eprint/171906 |
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