Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and The ATLAS Collaboration, (2014) Flavor tagged time-dependent angular analysis of the B0s → J/ψϕ decay and extraction of ΔΓs and the weak phase ϕs in ATLAS. Physical Review D, 90 (5). 052007. ISSN 2470-0010
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Abstract
A measurement of the B0s→J/ψϕ 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 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) rad
ΔΓs=0.053±0.021(stat)±0.010(syst) ps−¹
Γs=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) rad
where 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.
Item Type: | Article |
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Schools and Departments: | School of Mathematical and Physical Sciences > Physics and Astronomy |
Research Centres and Groups: | Experimental Particle Physics Research Group |
Subjects: | Q Science > QC Physics |
Depositing User: | Billy Wichaidit |
Date Deposited: | 02 May 2017 12:56 |
Last Modified: | 02 Jul 2019 19:36 |
URI: | http://sro.sussex.ac.uk/id/eprint/67605 |
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📧 Request an updateProject Name | Sussex Project Number | Funder | Funder Ref |
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ATLAS | G0275 | STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL | ST/I006048/1 |