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Measurement of the top-quark mass in tt¯ + 1-jet events collected with the ATLAS detector in pp collisions at √s = 8 TeV

  • Author(s): Aad, G
  • Abbott, B
  • Abbott, DC
  • Abdinov, O
  • Abed Abud, A
  • Abeling, K
  • Abhayasinghe, DK
  • Abidi, SH
  • AbouZeid, OS
  • Abraham, NL
  • Abramowicz, H
  • Abreu, H
  • Abulaiti, Y
  • Acharya, BS
  • Achkar, B
  • Adachi, S
  • Adam, L
  • Adam Bourdarios, C
  • Adamczyk, L
  • Adamek, L
  • Adelman, J
  • Adersberger, M
  • Adiguzel, A
  • Adorni, S
  • Adye, T
  • Affolder, AA
  • Afik, Y
  • Agapopoulou, C
  • Agaras, MN
  • Aggarwal, A
  • Agheorghiesei, C
  • Aguilar-Saavedra, JA
  • Ahmadov, F
  • Ahmed, WS
  • Ai, X
  • Aielli, G
  • Akatsuka, S
  • Akesson, TPA
  • Akilli, E
  • Akimov, AV
  • Al Khoury, K
  • Alberghi, GL
  • Albert, J
  • Alconada Verzini, MJ
  • Alderweireldt, S
  • Aleksa, M
  • Aleksandrov, IN
  • Alexa, C
  • Alexandre, D
  • Alexopoulos, T
  • Alfonsi, A
  • Alhroob, M
  • Ali, B
  • Alimonti, G
  • Alison, J
  • Alkire, SP
  • Allaire, C
  • Allbrooke, BMM
  • Allen, BW
  • Allport, PP
  • Aloisio, A
  • Alonso, A
  • Alonso, F
  • Alpigiani, C
  • Alshehri, AA
  • Alvarez Estevez, M
  • Álvarez Piqueras, D
  • Alviggi, MG
  • Amaral Coutinho, Y
  • Ambler, A
  • Ambroz, L
  • Amelung, C
  • Amidei, D
  • Amor Dos Santos, SP
  • Amoroso, S
  • Amrouche, CS
  • An, F
  • Anastopoulos, C
  • Andari, N
  • Andeen, T
  • Anders, CF
  • Anders, JK
  • Andreazza, A
  • Andrei, V
  • Anelli, CR
  • Angelidakis, S
  • Angerami, A
  • Anisenkov, AV
  • Annovi, A
  • Antel, C
  • Anthony, MT
  • Antonelli, M
  • Antrim, DJA
  • Anulli, F
  • Aoki, M
  • Aparisi Pozo, JA
  • Bella, LA
  • Arabidze, G
  • Araque, JP
  • Araujo Ferraz, V
  • et al.
Abstract

© 2019, The Author(s). A determination of the top-quark mass is presented using 20.2 fb−1 of 8 TeV proton-proton collision data produced by the Large Hadron Collider and collected by the ATLAS experiment. The normalised differential cross section of top-quark pair production in association with an energetic jet is measured in the lepton+jets final 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 defined in the (modified) 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: mtpole=171.1±0.4(stat)±0.9(syst)−0.3+0.7(theo)GeV The extracted value in the running-mass scheme is: mt(mt)=162.9±0.5(stat)±1.0(syst)−1.2+2.1(theo)GeV. The results for the top-quark mass using the two schemes are consistent, when translated from one scheme to the other. [Figure not available: see fulltext.]

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