Publications [#307557] of Ashutosh V. Kotwal

Papers Published
  1. Aad, G; Abajyan, T; Abbott, B; Abdallah, J; Khalek, SA; Abdinov, O; Aben, R; Abi, B; Abolins, M; Abou-Zeid, OS; Abramowicz, H; Abreu, H; Abulaiti, Y; Abulaiti, Y; Acharya, BS; Acharya, BS; Acharya, BS; Adamczyk, L; Adams, DL; Addy, TN; Adelman, J; Adomeit, S; Adye, T; Aefsky, S; Agatonovic-Jovin, T; Aguilar-Saavedra, JA; Aguilar-Saavedra, JA; Agustoni, M; Ahlen, SP; Ahmad, A; Ahsan, M; Aielli, G; Aielli, G; Åkesson, TPA; Akimoto, G; Akimov, AV; Alam, MA; Albert, J; Albrand, S; Verzini, MJA et al., Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector, Physical Review Letters, vol. 111 no. 23 (January, 2013), pp. 232002 [doi] .

    © 2013 CERN, for the ATLAS Collaboration. This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4:7 fb –1 of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at √s = 7 TeV. Final states containing one or two isolated leptons (electrons or muons) and jets are considered. Two measurements of α ℓ P, the product of the leptonic spin-analyzing power and the top quark polarization, are performed assuming that the polarization is introduced by either a CP conserving or a maximally CP violating production process. The measurements obtained, α ℓ P CPC =–0.035 ± 0.014(stat) ± 0:037(syst) and α ℓ P CPV = 0.020 ± 0:016(stat) +0.013 –0.017 (syst), are in good agreement with the standard model prediction of negligible top quark polarization.