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Flavor tagged time-dependent angular analysis of the Bs0 →J/ψφ decay and extraction of ΔΓs and the weak phase φs in ATLAS

  • Author(s): Aad, G
  • Abajyan, T
  • Abbott, B
  • Abdallah, J
  • Abdel Khalek, S
  • Abdinov, O
  • Aben, R
  • Abi, B
  • Abolins, M
  • Abouzeid, OS
  • Abramowicz, H
  • Abreu, H
  • Abulaiti, Y
  • Acharya, BS
  • Adamczyk, L
  • Adams, DL
  • Addy, TN
  • Adelman, J
  • Adomeit, S
  • Adye, T
  • Agatonovic-Jovin, T
  • Aguilar-Saavedra, JA
  • Agustoni, M
  • Ahlen, SP
  • Ahmad, A
  • Ahmadov, F
  • Aielli, G
  • Åkesson, TPA
  • Akimoto, G
  • Akimov, AV
  • Albert, J
  • Albrand, S
  • Alconada Verzini, MJ
  • Aleksa, M
  • Aleksandrov, IN
  • Alexa, C
  • Alexander, G
  • Alexandre, G
  • Alexopoulos, T
  • Alhroob, M
  • Alimonti, G
  • Alio, L
  • Alison, J
  • Allbrooke, BMM
  • Allison, LJ
  • Allport, PP
  • Allwood-Spiers, SE
  • Almond, J
  • Aloisio, A
  • Alon, R
  • Alonso, A
  • Alonso, F
  • Alpigiani, C
  • Altheimer, A
  • Alvarez Gonzalez, B
  • Alviggi, MG
  • Amako, K
  • Amaral Coutinho, Y
  • Amelung, C
  • Amidei, D
  • Ammosov, VV
  • Amor Dos Santos, SP
  • Amorim, A
  • Amoroso, S
  • Amram, N
  • Amundsen, G
  • Anastopoulos, C
  • Ancu, LS
  • Andari, N
  • Andeen, T
  • Anders, CF
  • Anders, G
  • Anderson, KJ
  • Andreazza, A
  • Andrei, V
  • Anduaga, XS
  • Angelidakis, S
  • Anger, P
  • Angerami, A
  • Anghinolfi, F
  • Anisenkov, AV
  • Anjos, N
  • Annovi, A
  • Antonaki, A
  • Antonelli, M
  • Antonov, A
  • Antos, J
  • Anulli, F
  • et al.
Abstract

© 2014 CERN, for the ATLAS Collaboration. A measurement of the Bs0→J/ψφ decay parameters, updated to include flavor tagging is reported using 4.9fb-1 of integrated luminosity collected by the ATLAS detector from s=7TeV pp collisions recorded in 2011 at the LHC. The values measured for the physical parameters are φs=0.12±0.25(stat)±0.05(syst)radΔΓs=0.053±0.021(stat)±0.010(syst)ps-1Γs=0.677±0.007(stat)±0.004(syst)ps-1|A (0)|2=0.220±0.008(stat)±0.009(syst)|A0(0)|2=0.529±0.006(stat)±0.012(syst)δ=3.89±0.47(stat)±0.11(syst)radwhere the parameter ΔΓs is constrained to be positive. The S-wave contribution was measured and found to be compatible with zero. Results for φs and ΔΓs are also presented as 68% and 95% likelihood contours, which show agreement with the Standard Model expectations.

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