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Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector

Publication ,  Journal Article
Aaboud, M; Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; AbouZeid, OS; Abraham, NL; Abramowicz, H; Abreu, H; Abreu, R; Abulaiti, Y ...
Published in: Journal of High Energy Physics
March 1, 2017
Published version (DOI)

Measurements of top quark spin observables in tt¯ events are presented based on 20.2 fb−1 of s=8 TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons). There are 15 observables, each sensitive to a different coefficient of the spin density matrix of tt¯ production, which are measured independently. Ten of these observables are measured for the first time. All of them are corrected for detector resolution and acceptance effects back to the parton and stable-particle levels. The measured values of the observables at parton level are compared to Standard Model predictions at next-to-leading order in QCD. The corrected distributions at stable-particle level are presented and the means of the distributions are compared to Monte Carlo predictions. No significant deviation from the Standard Model is observed for any observable.[Figure not available: see fulltext.]

Duke Scholars

Ayana T. Arce
Author Ayana T. Arce Physics
Ashutosh V. Kotwal
Author Ashutosh V. Kotwal Physics
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Published In

Journal of High Energy Physics

DOI

10.1007/JHEP03(2017)113

EISSN

1029-8479

ISSN

1126-6708

Publication Date

March 1, 2017

Volume

2017

Issue

3

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics
 

Citation

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Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., … Arnold, H. (2017). Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics, 2017(3). https://doi.org/10.1007/JHEP03(2017)113
Aaboud, M., G. Aad, B. Abbott, J. Abdallah, O. Abdinov, B. Abeloos, O. S. AbouZeid, et al. “Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector.” Journal of High Energy Physics 2017, no. 3 (March 1, 2017). https://doi.org/10.1007/JHEP03(2017)113.
Aaboud M, Aad G, Abbott B, Abdallah J, Abdinov O, Abeloos B, et al. Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics. 2017 Mar 1;2017(3).
Aaboud, M., et al. “Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector.” Journal of High Energy Physics, vol. 2017, no. 3, Mar. 2017. Scopus, doi:10.1007/JHEP03(2017)113.
Aaboud M, Aad G, Abbott B, Abdallah J, Abdinov O, Abeloos B, AbouZeid OS, Abraham NL, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adachi S, Adamczyk L, Adams DL, Adelman J, Adomeit S, Adye T, Affolder AA, Agatonovic-Jovin T, Aguilar-Saavedra JA, Ahlen SP, Ahmadov F, Aielli G, Akerstedt H, Åkesson TPA, Akimov AV, Alberghi GL, Albert J, Albrand S, Alconada Verzini MJ, Aleksa M, Aleksandrov IN, Alexa C, Alexander G, Alexopoulos T, Alhroob M, Ali B, Aliev M, Alimonti G, Alison J, Alkire SP, Allbrooke BMM, Allen BW, Allport PP, Aloisio A, Alonso A, Alonso F, Alpigiani C, Alshehri AA, Alstaty M, Gonzalez BA, Piqueras DÁ, Alviggi MG, Amadio BT, Coutinho YA, Amelung C, Amidei D, Amor Dos Santos SP, Amorim A, Amoroso S, Amundsen G, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders JK, Anderson KJ, Andreazza A, Andrei V, Angelidakis S, Angelozzi I, Angerami A, Anghinolfi F, Anisenkov AV, Anjos N, Annovi A, Antel C, Antonelli M, Antonov A, Antrim DJ, Anulli F, Aoki M, Bella LA, Arabidze G, Arai Y, Araque JP, Ferraz VA, Arce ATH, Arduh FA, Arguin JF, Argyropoulos S, Arik M, Armbruster AJ, Armitage LJ, Arnaez O, Arnold H. Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics. 2017 Mar 1;2017(3).
Journal cover image

Published In

Journal of High Energy Physics

DOI

10.1007/JHEP03(2017)113

EISSN

1029-8479

ISSN

1126-6708

Publication Date

March 1, 2017

Volume

2017

Issue

3

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics