Measurement of the CP-violating phase Φs and the Bs0 meson decay width difference with Bs0 → J/ψΦ decays in ATLAS
A measurement of the B s 0 decay parameters in the B s 0 → J/ψΦ channel using an integrated luminosity of 14.3 fb -1 collected by the ATLAS detector from 8 TeV pp collisions at the LHC is presented. The measured parameters include the CP -violating phase Φ s , the decay width Γ s and the width difference between the mass eigenstates ΔΓ s . The values measured for the physical parameters are statistically combined with those from 4.9 fb -1 of 7 TeV data, leading to the following: Φ s = -0.090 ± 0.078 (stat.) ± (syst.) rad Δ Γ s = 0.085 ± 0.011 (stat.) ± 0.007 (syst.) Ps -1 Δ Γ s = 0.675 ± 0.003 (stat.) ± 0.03 (syst.) Ps -1 In the analysis the parameter ΔΓ s is constrained to be positive. Results for Φ s and ΔΓ s are also presented as 68% and 95% likelihood contours in the Φ s -ΔΓ s plane. Also measured in this decay channel are the transversity amplitudes and corresponding strong phases. All measurements are in agreement with the Standard Model predictions.[Figure not available: see fulltext.]
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- The ATLAS Collaboration; The ATLAS collaboration
- Grant/Contract Number:
- AC02-76SF00515; AC02-05CH11231
- OSTI ID:
- 1325952
- Alternate ID(s):
- OSTI ID: 1379549
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2016, Issue 8; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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CP violation in the B system
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journal | December 2017 |
Charming new physics in rare B-decays and mixing? | text | January 2017 |
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