Publications [#313291] of Alfred T. Goshaw

Papers Published
  1. Aad, G; Abajyan, T; Abbott, B; Abdallah, J; Abdel Khalek, S; Abdelalim, AA; Abdinov, O; Aben, R; Abi, B; Abolins, M; Abouzeid, OS; Abramowicz, H; Abreu, H; Acerbi, E; Acharya, BS; Adamczyk, L; Adams, DL; Addy, TN; Adelman, J; Adomeit, S; Adragna, P; Adye, T; Aefsky, S; Aguilar-Saavedra, JA; Agustoni, M; Aharrouche, M; Ahlen, SP; Ahles, F; Ahmad, A; Ahsan, M; Aielli, G; Akdogan, T; Åkesson, TPA; Akimoto, G; Akimov, AV; Alam, MS; Alam, MA; Albert, J; Albrand, S; Aleksa, M; Aleksandrov, IN et al., Time-dependent angular analysis of the decay B0s→ J / ψ φ and extraction of ΔΓsand the CP-violating weak phase φsby ATLAS, Journal of High Energy Physics, vol. 2012 no. 12 (December, 2012) [doi] .

    Abstract:
    A measurement of B 0 s → J /ψφ decay parameters, including the CP -violating weak phase φ s and the decay width difference ΔΓ s is reported, using 4.9 fb -1 of integrated luminosity collected in 2011 by the ATLAS detector from LHC pp collisions at a centre-of-mass energy √s = 7 TeV. The mean decay width Γ s and the transversity amplitudes |A 0 (0)| 2 and |A arap; (0)| 2 are also measured. The values reported for these parameters are: φs = 0.22 ± 0.41 (stat) ± 0.10 (syst) rad} ΔΓ s = 0.053 ± 0.021 (stat) ± 0.010 (sast) ps -1 Γ s = 0.677 ± 0.007 (stat) ± 0.004 (sast) ps -1 |A 0 (0)| 2 = 0.528 ± 0.006 (stat) ± 0.009 (sast) |A 0 (0)| 2 = 0.220 ± 0.008 (stat) ± 0.007 (sast) where the values quoted for φ s and ΔΓ s correspond to the solution compatible with the external measurements to which the strong phase δ ⊥ is constrained and where ΔΓ s is constrained to be positive. The fraction of S-wave KK or f 0 contamination through the decays B 0 s → J /ψK + K - }}\left({{f-0}} \right)}} \right.} is measured as well and is found to be consistent with zero. Results for φ s and ΔΓ s are also presented as 68%, 90% and 95% likelihood contours, which show agreement with Standard Model expectations.[Figure not available: see fulltext.] © 2012 CERN for the benefit of the ATLAS collaboration.