Home > Research > Publications & Outputs > Measurement of the energy asymmetry in t t ¯ j ...

Associated organisational unit

Links

Text available via DOI:

View graph of relations

Measurement of the energy asymmetry in t t ¯ j production at 13 TeV with the ATLAS experiment and interpretation in the SMEFT framework

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Measurement of the energy asymmetry in t t ¯ j production at 13 TeV with the ATLAS experiment and interpretation in the SMEFT framework. / ATLAS Collaboration.
In: European Physical Journal C: Particles and Fields, Vol. 82, No. 4, 374, 28.04.2022.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

APA

Vancouver

ATLAS Collaboration. Measurement of the energy asymmetry in t t ¯ j production at 13 TeV with the ATLAS experiment and interpretation in the SMEFT framework. European Physical Journal C: Particles and Fields. 2022 Apr 28;82(4):374. doi: 10.1140/epjc/s10052-022-10101-w

Author

ATLAS Collaboration. / Measurement of the energy asymmetry in t t ¯ j production at 13 TeV with the ATLAS experiment and interpretation in the SMEFT framework. In: European Physical Journal C: Particles and Fields. 2022 ; Vol. 82, No. 4.

Bibtex

@article{690af27e39b849e1ad3afcd074679a96,
title = "Measurement of the energy asymmetry in t t ¯ j production at 13 TeV with the ATLAS experiment and interpretation in the SMEFT framework",
abstract = "Abstract: A measurement of the energy asymmetry in jet-associated top-quark pair production is presented using 139fb-1 of data collected by the ATLAS detector at the Large Hadron Collider during pp collisions at s=13TeV. The observable measures the different probability of top and antitop quarks to have the higher energy as a function of the jet scattering angle with respect to the beam axis. The energy asymmetry is measured in the semileptonic tt¯ decay channel, and the hadronically decaying top quark must have transverse momentum above 350GeV. The results are corrected for detector effects to particle level in three bins of the scattering angle of the associated jet. The measurement agrees with the SM prediction at next-to-leading-order accuracy in quantum chromodynamics in all three bins. In the bin with the largest expected asymmetry, where the jet is emitted perpendicular to the beam, the energy asymmetry is measured to be -0.043±0.020, in agreement with the SM prediction of -0.037±0.003. Interpreting this result in the framework of the Standard Model effective field theory (SMEFT), it is shown that the energy asymmetry is sensitive to the top-quark chirality in four-quark operators and is therefore a valuable new observable in global SMEFT fits.",
keywords = "Regular Article - Experimental Physics",
author = "{ATLAS Collaboration} and A.E. Barton and I.A. Bertram and G. Borissov and E.V. Bouhova-Thacker and H. Fox and R.C.W. Henderson and R.W.L. Jones and V. Kartvelishvili and P.A. Love and D. Muenstermann and K. Rybacki and Izaac Sanderswood and M. Smizanska and S. Spinali and A.M. Wharton and Melissa Yexley",
year = "2022",
month = apr,
day = "28",
doi = "10.1140/epjc/s10052-022-10101-w",
language = "English",
volume = "82",
journal = "European Physical Journal C: Particles and Fields",
issn = "1434-6044",
publisher = "SPRINGER",
number = "4",

}

RIS

TY - JOUR

T1 - Measurement of the energy asymmetry in t t ¯ j production at 13 TeV with the ATLAS experiment and interpretation in the SMEFT framework

AU - ATLAS Collaboration

AU - Barton, A.E.

AU - Bertram, I.A.

AU - Borissov, G.

AU - Bouhova-Thacker, E.V.

AU - Fox, H.

AU - Henderson, R.C.W.

AU - Jones, R.W.L.

AU - Kartvelishvili, V.

AU - Love, P.A.

AU - Muenstermann, D.

AU - Rybacki, K.

AU - Sanderswood, Izaac

AU - Smizanska, M.

AU - Spinali, S.

AU - Wharton, A.M.

AU - Yexley, Melissa

PY - 2022/4/28

Y1 - 2022/4/28

N2 - Abstract: A measurement of the energy asymmetry in jet-associated top-quark pair production is presented using 139fb-1 of data collected by the ATLAS detector at the Large Hadron Collider during pp collisions at s=13TeV. The observable measures the different probability of top and antitop quarks to have the higher energy as a function of the jet scattering angle with respect to the beam axis. The energy asymmetry is measured in the semileptonic tt¯ decay channel, and the hadronically decaying top quark must have transverse momentum above 350GeV. The results are corrected for detector effects to particle level in three bins of the scattering angle of the associated jet. The measurement agrees with the SM prediction at next-to-leading-order accuracy in quantum chromodynamics in all three bins. In the bin with the largest expected asymmetry, where the jet is emitted perpendicular to the beam, the energy asymmetry is measured to be -0.043±0.020, in agreement with the SM prediction of -0.037±0.003. Interpreting this result in the framework of the Standard Model effective field theory (SMEFT), it is shown that the energy asymmetry is sensitive to the top-quark chirality in four-quark operators and is therefore a valuable new observable in global SMEFT fits.

AB - Abstract: A measurement of the energy asymmetry in jet-associated top-quark pair production is presented using 139fb-1 of data collected by the ATLAS detector at the Large Hadron Collider during pp collisions at s=13TeV. The observable measures the different probability of top and antitop quarks to have the higher energy as a function of the jet scattering angle with respect to the beam axis. The energy asymmetry is measured in the semileptonic tt¯ decay channel, and the hadronically decaying top quark must have transverse momentum above 350GeV. The results are corrected for detector effects to particle level in three bins of the scattering angle of the associated jet. The measurement agrees with the SM prediction at next-to-leading-order accuracy in quantum chromodynamics in all three bins. In the bin with the largest expected asymmetry, where the jet is emitted perpendicular to the beam, the energy asymmetry is measured to be -0.043±0.020, in agreement with the SM prediction of -0.037±0.003. Interpreting this result in the framework of the Standard Model effective field theory (SMEFT), it is shown that the energy asymmetry is sensitive to the top-quark chirality in four-quark operators and is therefore a valuable new observable in global SMEFT fits.

KW - Regular Article - Experimental Physics

U2 - 10.1140/epjc/s10052-022-10101-w

DO - 10.1140/epjc/s10052-022-10101-w

M3 - Journal article

VL - 82

JO - European Physical Journal C: Particles and Fields

JF - European Physical Journal C: Particles and Fields

SN - 1434-6044

IS - 4

M1 - 374

ER -