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

PDF - Published Version Available under License Creative Commons Attribution. Download (859kB)

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
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

View download statistics for this item

📧 Request an update