Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector. / Aad, G; Berry, Tracey; Blanco, Jacob; Boisvert, Veronique; Brooks, Tim; Connelly, Ian; Cowan, Glen; Duguid, Liam; Faucci Giannelli, Michele; George, Simon; Gibson, Stephen; Kempster, Jacob; Panduro Vazquez, J G; Pastore, Francesca; Savage, Graham; Sowden, Benjamin; Spano, Francesco; Teixeira-Dias, Pedro; Thomas-Wilsker, Joshuha; The ATLAS Collaboration.

In: European Physical Journal C: Particles and Fields, Vol. 76, 538, 03.10.2016, p. 1-39.

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@article{124b8ef7e16e4f468eb7f00adc8badcf,
title = "Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector",
abstract = "Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, tt¯tt¯ system and event-level kinematic observables in proton–proton collisions at a centre-of-mass energy of s√=8TeVs=8TeV . The observables have been chosen to emphasize the tt¯tt¯ production process and to be sensitive to effects of initial- and final-state radiation, to the different parton distribution functions, and to non-resonant processes and higher-order corrections. The dataset corresponds to an integrated luminosity of 20.3 fb −1−1 , recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector effects and are compared to several Monte Carlo simulations. The results are in fair agreement with the predictions over a wide kinematic range. Nevertheless, most generators predict a harder top-quark transverse momentum distribution at high values than what is observed in the data. Predictions beyond NLO accuracy improve the agreement with data at high top-quark transverse momenta. Using the current settings and parton distribution functions, the rapidity distributions are not well modelled by any generator under consideration. However, the level of agreement is improved when more recent sets of parton distribution functions are used.",
author = "G Aad and Tracey Berry and Jacob Blanco and Veronique Boisvert and Tim Brooks and Ian Connelly and Glen Cowan and Liam Duguid and {Faucci Giannelli}, Michele and Simon George and Stephen Gibson and Jacob Kempster and {Panduro Vazquez}, {J G} and Francesca Pastore and Graham Savage and Benjamin Sowden and Francesco Spano and Pedro Teixeira-Dias and Joshuha Thomas-Wilsker and {The ATLAS Collaboration}",
year = "2016",
month = oct,
day = "3",
doi = "10.1140/epjc/s10052-016-4366-4",
language = "English",
volume = "76",
pages = "1--39",
journal = "European Physical Journal C: Particles and Fields",
issn = "1434-6044",
publisher = "Springer New York",

}

RIS

TY - JOUR

T1 - Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at √s = 8 TeV using the ATLAS detector

AU - Aad, G

AU - Berry, Tracey

AU - Blanco, Jacob

AU - Boisvert, Veronique

AU - Brooks, Tim

AU - Connelly, Ian

AU - Cowan, Glen

AU - Duguid, Liam

AU - Faucci Giannelli, Michele

AU - George, Simon

AU - Gibson, Stephen

AU - Kempster, Jacob

AU - Panduro Vazquez, J G

AU - Pastore, Francesca

AU - Savage, Graham

AU - Sowden, Benjamin

AU - Spano, Francesco

AU - Teixeira-Dias, Pedro

AU - Thomas-Wilsker, Joshuha

AU - The ATLAS Collaboration

PY - 2016/10/3

Y1 - 2016/10/3

N2 - Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, tt¯tt¯ system and event-level kinematic observables in proton–proton collisions at a centre-of-mass energy of s√=8TeVs=8TeV . The observables have been chosen to emphasize the tt¯tt¯ production process and to be sensitive to effects of initial- and final-state radiation, to the different parton distribution functions, and to non-resonant processes and higher-order corrections. The dataset corresponds to an integrated luminosity of 20.3 fb −1−1 , recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector effects and are compared to several Monte Carlo simulations. The results are in fair agreement with the predictions over a wide kinematic range. Nevertheless, most generators predict a harder top-quark transverse momentum distribution at high values than what is observed in the data. Predictions beyond NLO accuracy improve the agreement with data at high top-quark transverse momenta. Using the current settings and parton distribution functions, the rapidity distributions are not well modelled by any generator under consideration. However, the level of agreement is improved when more recent sets of parton distribution functions are used.

AB - Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, tt¯tt¯ system and event-level kinematic observables in proton–proton collisions at a centre-of-mass energy of s√=8TeVs=8TeV . The observables have been chosen to emphasize the tt¯tt¯ production process and to be sensitive to effects of initial- and final-state radiation, to the different parton distribution functions, and to non-resonant processes and higher-order corrections. The dataset corresponds to an integrated luminosity of 20.3 fb −1−1 , recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider. Events are selected in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of the jets tagged as originating from a b-quark. The measured spectra are corrected for detector effects and are compared to several Monte Carlo simulations. The results are in fair agreement with the predictions over a wide kinematic range. Nevertheless, most generators predict a harder top-quark transverse momentum distribution at high values than what is observed in the data. Predictions beyond NLO accuracy improve the agreement with data at high top-quark transverse momenta. Using the current settings and parton distribution functions, the rapidity distributions are not well modelled by any generator under consideration. However, the level of agreement is improved when more recent sets of parton distribution functions are used.

U2 - 10.1140/epjc/s10052-016-4366-4

DO - 10.1140/epjc/s10052-016-4366-4

M3 - Article

VL - 76

SP - 1

EP - 39

JO - European Physical Journal C: Particles and Fields

JF - European Physical Journal C: Particles and Fields

SN - 1434-6044

M1 - 538

ER -