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Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector

Journal articles  - Journal Article
The ATLAS collaboration; Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Aben, R; Abolins, M; AbouZeid, OS; Abramowicz, H; Abreu, H; Abreu, R ...
Published in: Journal of High Energy Physics
November 1, 2015

Abstract: The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at √s = 8 TeV. The dataset corresponds to an integrated luminosity of 20.3 fb−1 collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the tt¯W and tt¯Z processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for tt¯W (tt¯Z) production. The measured cross sections are (Formula presented.) fb and (Formula presented.) fb. The background-only hypothesis with neither tt¯W nor tt¯Z production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the tt¯W and tt¯Z processes.[Figure not available: see fulltext.]

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Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

November 1, 2015

Volume

2015

Issue

11

Start / End Page

1 / 48

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
 

Citation

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The ATLAS collaboration, Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., … Artamonov, A. (2015). Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector. Journal of High Energy Physics, 2015(11), 1–48. https://doi.org/10.1007/JHEP11(2015)172
The ATLAS collaboration, G. Aad, B. Abbott, J. Abdallah, O. Abdinov, R. Aben, M. Abolins, et al. “Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector.” Journal of High Energy Physics 2015, no. 11 (November 1, 2015): 1–48. https://doi.org/10.1007/JHEP11(2015)172.
The ATLAS collaboration, Aad G, Abbott B, Abdallah J, Abdinov O, Aben R, et al. Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector. Journal of High Energy Physics. 2015 Nov 1;2015(11):1–48.
The ATLAS collaboration, et al. “Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector.” Journal of High Energy Physics, vol. 2015, no. 11, Nov. 2015, pp. 1–48. Scopus, doi:10.1007/JHEP11(2015)172.
The ATLAS collaboration, Aad G, Abbott B, Abdallah J, Abdinov O, Aben R, Abolins M, AbouZeid OS, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adamczyk L, Adams DL, Adelman J, Adomeit S, Adye T, Affolder AA, Agatonovic-Jovin T, Agricola J, 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, Alimonti G, Alio L, Alison J, Alkire SP, Allbrooke BMM, Allport PP, Aloisio A, Alonso A, Alonso F, Alpigiani C, Altheimer A, Alvarez Gonzalez B, Álvarez Piqueras D, Alviggi MG, Amadio BT, Amako K, Amaral Coutinho Y, Amelung C, Amidei D, Amor Dos Santos SP, Amorim A, Amoroso S, Amram N, Amundsen G, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders G, Anders JK, Anderson KJ, Andreazza A, Andrei V, Angelidakis S, Angelozzi I, Anger P, Angerami A, Anghinolfi F, Anisenkov AV, Anjos N, Annovi A, Antonelli M, Antonov A, Antos J, Anulli F, Aoki M, Aperio Bella L, Arabidze G, Arai Y, Araque JP, Arce ATH, Arduh FA, Arguin JF, Argyropoulos S, Arik M, Armbruster AJ, Arnaez O, Arnold H, Arratia M, Arslan O, Artamonov A. Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector. Journal of High Energy Physics. 2015 Nov 1;2015(11):1–48.
Journal cover image

Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

November 1, 2015

Volume

2015

Issue

11

Start / End Page

1 / 48

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics