Journal article
Measurement of event-shape observables in Z → ℓ+ℓ− events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC
The European physical journal. C, Particles and fields, Vol.76(7), 375
2016
DOI: 10.1140/epjc/s10052-016-4176-8
PMID: 28280446
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. © CERN for the benefit of the ATLAS collaboration 2016.
Details
- Title: Subtitle
- Measurement of event-shape observables in Z → ℓ+ℓ− events in pp collisions at √ s = 7 TeV with the ATLAS detector at the LHC
- Creators
- G Aad - Aix-Marseille UniversitéB Abbott - University of OklahomaJ Abdallah - Academia SinicaO Abdinov - Azerbaijan National Academy of SciencesB Abeloos - Université Paris-SaclayR Aben - University of AmsterdamTorsten Åkesson - Particle PhysicsSimona Bocchetta - Lund UniversityLENE Bryngemark - Lund UniversityCaterina Doglioni - Particle PhysicsAnders Floderus - Particle PhysicsAnthony Hawkins - Particle PhysicsVincent Hedberg - Particle PhysicsJenny Ivarsson - Particle PhysicsGöran Jarlskog - Particle PhysicsElse Lytken - Particle PhysicsUlf Mjörnmark - Particle PhysicsOxana Smirnova - Particle PhysicsOleksandr Viazlo - Particle PhysicsATLAS Collaboration
- Contributors
- U Mallik (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- The European physical journal. C, Particles and fields, Vol.76(7), 375
- DOI
- 10.1140/epjc/s10052-016-4176-8
- PMID
- 28280446
- NLM abbreviation
- Eur Phys J C Part Fields
- ISSN
- 1434-6044
- eISSN
- 1434-6052
- Publisher
- Springer
- Language
- English
- Date published
- 2016
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199829102771
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