Measurement of the top-quark mass in tt + 1-jet events collected with the ATLAS detector in pp collisions at √ s = 8 TeV
Date
2019
Authors
Aad, G.
Abbott, B.
Abbott, D.C.
Abdinov, O.
Abed Abud, A.
Abeling, K.
Abhayasinghe, D.K.
Abidi, S.H.
AbouZeid, O.S
Abraham, N.L.
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of High Energy Physics
Abstract
A determination of the top-quark mass is presented using 20.2 fb−1 of 8 TeV TeV
proton-proton collision data produced by the Large Hadron Collider and collected by the
ATLAS experiment. The normalised di erential cross section of top-quark pair production
in association with an energetic jet is measured in the lepton+jets nal state and unfolded
to parton and particle levels. The unfolded distribution at parton level can be described
using next-to-leading-order QCD predictions in terms of either the top-quark pole mass or
the running mass as de ned in the (modi ed) minimal subtraction scheme. A comparison
between the experimental distribution and the theoretical prediction allows the top-quark
mass to be extracted in the two schemes. The value obtained for the pole-mass scheme is:
mpole
t = 171:1 0:4 (stat) 0:9 (syst) +0:7 -0:3 (theo) GeV:
The extracted value in the running-mass scheme is:
mt(mt) = 162:9 0:5 (stat) 1:0 (syst) +2:1 -1:2 (theo) GeV:
The results for the top-quark mass using the two schemes are consistent, when translated
from one scheme to the other.
Description
Keywords
Hadron-Hadron scattering (experiments), Top physics
Citation
Aad, G., Abbott, B., Abbott, D.C., Abdinov, O., Abed Abud, A., Abeling, K., … Zwalinski, L (2019). Measurement of the top-quark mass in tt + 1-jet events collected with the ATLAS detector in pp collisions at √s = 8 TeV. Journal of High Energy Physics, 2019(11) https://doi.org/10.1007/JHEP11(2019)150