Time-dependent angular analysis of the decay B-s(0) -> J/psi phi and extraction of Delta Gamma(s) and the CP-violating weak phase phi(s) by ATLAS
A measurement of B0s → 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 widt...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2012
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| _version_ | 1797072365424738304 |
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| author | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdelalim, A Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Acerbi, E Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M |
| author_facet | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdelalim, A Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Acerbi, E Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M |
| author_sort | Aad, G |
| collection | OXFORD |
| description | A measurement of B0s → 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 |A0(0)|2 = 0.528 ± 0.006 (stat) ± 0.009 (sast) |A0(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 B0s→ 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. |
| first_indexed | 2024-03-06T23:06:46Z |
| format | Journal article |
| id | oxford-uuid:641589da-f143-470f-89e8-26b58fd19a32 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:06:46Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:641589da-f143-470f-89e8-26b58fd19a322022-03-26T18:16:54ZTime-dependent angular analysis of the decay B-s(0) -> J/psi phi and extraction of Delta Gamma(s) and the CP-violating weak phase phi(s) by ATLASJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:641589da-f143-470f-89e8-26b58fd19a32EnglishSymplectic Elements at Oxford2012Aad, GAbajyan, TAbbott, BAbdallah, JKhalek, SAAbdelalim, AAbdinov, OAben, RAbi, BAbolins, MAbouZeid, OAbramowicz, HAbreu, HAcerbi, EAcharya, BAdamczyk, LAdams, DAddy, TAdelman, JAdomeit, SAdragna, PAdye, TAefsky, SAguilar-Saavedra, JAgustoni, MA measurement of B0s → 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 |A0(0)|2 = 0.528 ± 0.006 (stat) ± 0.009 (sast) |A0(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 B0s→ 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. |
| spellingShingle | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdelalim, A Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Acerbi, E Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M Time-dependent angular analysis of the decay B-s(0) -> J/psi phi and extraction of Delta Gamma(s) and the CP-violating weak phase phi(s) by ATLAS |
| title | Time-dependent angular analysis of the decay B-s(0) -> J/psi phi and extraction of Delta Gamma(s) and the CP-violating weak phase phi(s) by ATLAS |
| title_full | Time-dependent angular analysis of the decay B-s(0) -> J/psi phi and extraction of Delta Gamma(s) and the CP-violating weak phase phi(s) by ATLAS |
| title_fullStr | Time-dependent angular analysis of the decay B-s(0) -> J/psi phi and extraction of Delta Gamma(s) and the CP-violating weak phase phi(s) by ATLAS |
| title_full_unstemmed | Time-dependent angular analysis of the decay B-s(0) -> J/psi phi and extraction of Delta Gamma(s) and the CP-violating weak phase phi(s) by ATLAS |
| title_short | Time-dependent angular analysis of the decay B-s(0) -> J/psi phi and extraction of Delta Gamma(s) and the CP-violating weak phase phi(s) by ATLAS |
| title_sort | time dependent angular analysis of the decay b s 0 gt j psi phi and extraction of delta gamma s and the cp violating weak phase phi s by atlas |
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