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Search for quark contact interactions in dijet angular distributions in pp collisions at s=7 TeV measured with the ATLAS detector

  • Author(s): Aad, G
  • Abbott, B
  • Abdallah, J
  • Abdelalim, AA
  • Abdesselam, A
  • Abdinov, O
  • Abi, B
  • Abolins, M
  • Abramowicz, H
  • Abreu, H
  • Acerbi, E
  • Acharya, BS
  • Ackers, M
  • Adams, DL
  • Addy, TN
  • Adelman, J
  • Aderholz, M
  • Adomeit, S
  • Adorisio, C
  • Adragna, P
  • Adye, T
  • Aefsky, S
  • Aguilar-Saavedra, JA
  • Aharrouche, M
  • Ahlen, SP
  • Ahles, F
  • Ahmad, A
  • Ahmed, H
  • Ahsan, M
  • Aielli, G
  • Akdogan, T
  • Åkesson, TPA
  • Akimoto, G
  • Akimov, AV
  • Aktas, A
  • Alam, MS
  • Alam, MA
  • Albrand, S
  • Aleksa, M
  • Aleksandrov, IN
  • Aleppo, M
  • Alessandria, F
  • Alexa, C
  • Alexander, G
  • Alexandre, G
  • Alexopoulos, T
  • Alhroob, M
  • Aliev, M
  • Alimonti, G
  • Alison, J
  • Aliyev, M
  • Allport, PP
  • Allwood-Spiers, SE
  • Almond, J
  • Aloisio, A
  • Alon, R
  • Alonso, A
  • Alonso, J
  • Alviggi, MG
  • Amako, K
  • Amaral, P
  • Ambrosio, G
  • Amelung, C
  • Ammosov, VV
  • Amorim, A
  • Amorós, G
  • Amram, N
  • Anastopoulos, C
  • Andeen, T
  • Anders, CF
  • Anderson, KJ
  • Andreazza, A
  • Andrei, V
  • Andrieux, ML
  • Anduaga, XS
  • Angerami, A
  • Anghinolfi, F
  • Anjos, N
  • Annovi, A
  • Antonaki, A
  • Antonelli, M
  • Antonelli, S
  • Antos, J
  • Antunovic, B
  • Anulli, F
  • Aoun, S
  • Apolle, R
  • Arabidze, G
  • Aracena, I
  • Arai, Y
  • et al.
Abstract

Dijet angular distributions from the first LHC pp collisions at center-of-mass energy s=7 TeV have been measured with the ATLAS detector. The dataset used for this analysis represents an integrated luminosity of 3.1 pb-1. Dijet Χ distributions and centrality ratios have been measured up to dijet masses of 2.8 TeV, and found to be in good agreement with Standard Model predictions. Analysis of the λ distributions excludes quark contact interactions with a compositeness scale Χ below 3.4 TeV, at 95% confidence level, significantly exceeding previous limits. © 2010 CERN.

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