Publications [#321522] of Ayana T. Arce

Papers Accepted
  1. Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; Aben, R; Abolins, M; AbouZeid, O; Abramowicz, H; Abreu, H; Abreu, R; Abulaiti, Y; Acharya, B; Adamczyk, L; Adams, D; Adelman, J; Adomeit, S; Adye, T; Affolder, A; Agatonovic-Jovin, T; Agricola, J; Aguilar-Saavedra, J; Ahlen, S; Ahmadov, F; Aielli, G; Akerstedt, H; Åkesson, T; Akimov, A; Alberghi, G; Albert, J; Albrand, S; Alconada Verzini, M; Aleksa, M; Aleksandrov, I; Alexa, C; Alexander, G; Alexopoulos, T; Alhroob, M; Alimonti, G et al., Measurement of the charge asymmetry in highly boosted top-quark pair production in pp collision data collected by the ATLAS experiment, Physics Letters B, vol. 756 (May, 2016), pp. 52-71 [doi] .

    © 2016 CERN for the benefit of the ATLAS Collaboration.In the pp→tt process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb-1 of pp collision data at √s=8TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair (mtt>0.75 TeV) and an absolute rapidity difference of the top and anti-top quark candidates within -2<|yt|-|yt|<2 is measured to be 4.2±3.2%, in agreement with the Standard Model prediction at next-to-leading order. A differential measurement in three tt- mass bins is also presented.