Flavor tagged time-dependent angular analysis of the decay and extraction of and the weak phase in ATLAS

Georges Aad,Tatevik Abajyan,Brad Abbott,Jalal Abdallah,S Abdel Khalek,O Abdinov,Rosemarie Aben,Babak Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu, Y Abulaiti,BS Acharya,L Adamczyk,DL Adams, TN Addy,J Adelman, S Adomeit,T Adye,T Agatonovic-Jovin,JA Aguilar-Saavedra, M Agustoni,SP Ahlen,A Ahmad,F Ahmadov, G Aielli,TPA Åkesson, G Akimoto,AV Akimov,J Albert, S Albrand,MJ Alconada Verzini,M Aleksa,IN Aleksandrov,C Alexa, G Alexander,G Alexandre,T Alexopoulos,M Alhroob,G Alimonti,L Alio,J Alison,BMM Allbrooke,LJ Allison, PP Allport,SE Allwood-Spiers,J Almond,A Aloisio, R Alon,A Alonso, F Alonso, C Alpigiani, A Altheimer,B Alvarez Gonzalez,MG Alviggi, K Amako, Y Amaral Coutinho,C Amelung,D Amidei,VV Ammosov,SP Amor Dos Santos, A Amorim,S Amoroso, N Amram, G Amundsen,C Anastopoulos, LS Ancu,N Andari, T Andeen,CF Anders, G Anders,KJ Anderson,A Andreazza, V Andrei,XS Anduaga,S Angelidakis,P Anger, A Angerami, F Anghinolfi,AV Anisenkov, N Anjos,A Annovi, A Antonaki,M Antonelli,A Antonov,J Antos, F Anulli,M Aoki,L Aperio Bella, R Apolle,G Arabidze, I Aracena,Y Arai, JP Araque,ATH Arce,JF Arguin, S Argyropoulos,M Arik, AJ Armbruster, O Arnaez,V Arnal,O Arslan, A Artamonov, G Artoni,S Asai, N Asbah, A Ashkenazi, S Ask, B Åsman,L Asquith,K Assamagan, R Astalos,M Atkinson, NB Atlay, B Auerbach, E Auge, K Augsten, M Aurousseau, G Avolio, G Azuelos, Y Azuma,MA Baak, C Bacci,AM Bach, H Bachacou,K Bachas,M Backes,M Backhaus,J Backus Mayes, E Badescu,P Bagiacchi, P Bagnaia,Y Bai,DC Bailey, T Bain,JT Baines,OK Baker,S Baker, P Balek, F Balli, E Banas,Sw Banerjee, D Banfi, A Bangert,AAE Bannoura,V Bansal,HS Bansil, L Barak,SP Baranov

Physical Review D（2014）

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摘要

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

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