Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS
A measurement of B[0 over s] → J/ψϕ decay parameters, including the CP-violating weak phase ϕ[subscript s] and the decay width difference ΔΓ[subscript s] is reported, using 4.9 fb[superscript −1] of integrated luminosity collected in 2011 by the ATLAS detector from LHC pp collisions at a centre-of-m...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Springer-Verlag
2014
|
| Online Access: | http://hdl.handle.net/1721.1/84938 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1811078109858889728 |
|---|---|
| author | Taylor, Frank E. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. |
| author_sort | Taylor, Frank E. |
| collection | MIT |
| description | A measurement of B[0 over s] → J/ψϕ decay parameters, including the CP-violating weak phase ϕ[subscript s] and the decay width difference ΔΓ[subscript s] is reported, using 4.9 fb[superscript −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[subscript s] and the transversity amplitudes |A [subscript 0](0)|[superscript 2] and |A [subscript ∥](0)|[superscript 2] are also measured. The values reported for these parameters are: ϕ[subscript s] = 0.22 ± 0.41 (stat.) ± 0.10 (syst.) rad; ΔΓ[subscript s] = 0.053 ± 0.021 (stat.) ± 0.010 (syst.) ps[superscript −1]; Γ[subscript s] = 0.677 ± 0.007 (stat.) ± 0.004 (syst.) ps[superscript −1]; |A[subscript 0](0)|[superscript 2] = 0.528 ± 0.006 (stat.) ± 0.009 (syst.); |A[subscript ∥](0)|[superscript 2] = 0.220 ± 0.008 (stat.) ± 0.007 (syst.) where the values quoted for ϕ[subscript s] and ΔΓ[subscript s] correspond to the solution compatible with the external measurements to which the strong phase δ[subscript ⊥] is constrained and where ΔΓ[subscript s] is constrained to be positive. The fraction of S-wave KK or f[subscript 0] contamination through the decays B[0 over s] → J/ψK[superscript +]K[superscript −](f[subscript 0]) is measured as well and is found to be consistent with zero. Results for ϕ[subscript s] and ΔΓ[subscript s] are also presented as 68%, 90% and 95% likelihood contours, which show agreement with Standard Model expectations. |
| first_indexed | 2024-09-23T10:53:33Z |
| format | Article |
| id | mit-1721.1/84938 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:53:33Z |
| publishDate | 2014 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/849382022-09-27T15:46:47Z Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS Taylor, Frank E. Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. A measurement of B[0 over s] → J/ψϕ decay parameters, including the CP-violating weak phase ϕ[subscript s] and the decay width difference ΔΓ[subscript s] is reported, using 4.9 fb[superscript −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[subscript s] and the transversity amplitudes |A [subscript 0](0)|[superscript 2] and |A [subscript ∥](0)|[superscript 2] are also measured. The values reported for these parameters are: ϕ[subscript s] = 0.22 ± 0.41 (stat.) ± 0.10 (syst.) rad; ΔΓ[subscript s] = 0.053 ± 0.021 (stat.) ± 0.010 (syst.) ps[superscript −1]; Γ[subscript s] = 0.677 ± 0.007 (stat.) ± 0.004 (syst.) ps[superscript −1]; |A[subscript 0](0)|[superscript 2] = 0.528 ± 0.006 (stat.) ± 0.009 (syst.); |A[subscript ∥](0)|[superscript 2] = 0.220 ± 0.008 (stat.) ± 0.007 (syst.) where the values quoted for ϕ[subscript s] and ΔΓ[subscript s] correspond to the solution compatible with the external measurements to which the strong phase δ[subscript ⊥] is constrained and where ΔΓ[subscript s] is constrained to be positive. The fraction of S-wave KK or f[subscript 0] contamination through the decays B[0 over s] → J/ψK[superscript +]K[superscript −](f[subscript 0]) is measured as well and is found to be consistent with zero. Results for ϕ[subscript s] and ΔΓ[subscript s] are also presented as 68%, 90% and 95% likelihood contours, which show agreement with Standard Model expectations. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2014-02-14T13:55:13Z 2014-02-14T13:55:13Z 2012-12 2012-11 Article http://purl.org/eprint/type/JournalArticle 1029-8479 1126-6708 http://hdl.handle.net/1721.1/84938 Aad, G., T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A. A. Abdelalim, O. Abdinov, et al. “Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS.” Journal of High Energy Physics 2012, no. 12 (December 13, 2012). © CERN, for the benefit of the ATLAS collaboration https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1007/jhep12(2012)072 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer |
| spellingShingle | Taylor, Frank E. Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS |
| title | Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS |
| title_full | Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS |
| title_fullStr | Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS |
| title_full_unstemmed | Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS |
| title_short | Time-dependent angular analysis of the decay B[0 over s] → J/ψϕ and extraction of ΔΓ[subscript s] and the CP-violating weak phase ϕ[subscript s] by ATLAS |
| title_sort | time dependent angular analysis of the decay b 0 over s j ψϕ and extraction of δγ subscript s and the cp violating weak phase ϕ subscript s by atlas |
| url | http://hdl.handle.net/1721.1/84938 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke timedependentangularanalysisofthedecayb0oversjpsphandextractionofdgsubscriptsandthecpviolatingweakphasephsubscriptsbyatlas |