Flavor tagged time-dependent angular analysis of the B0s → J/ψΦ decay and extraction of Δ Γs and the weak phase Φs in ATLAS

Agustoni, Marco; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Gallo, Valentina; Haug, Sigve; Kruker, Tobias; Marti, Lukas; Meloni, Federico; Schneider, Basil; Sciacca, Gianfranco; Stramaglia, Maria; Stucci, Stefania Antonia; Weber, Michael (2014). Flavor tagged time-dependent angular analysis of the B0s → J/ψΦ decay and extraction of Δ Γs and the weak phase Φs in ATLAS. Physical review. D - particles, fields, gravitation, and cosmology, D90(5), 052007. Melville, N.Y.: American Physical Society 10.1103/PhysRevD.90.052007

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A measurement of the B 0 s →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
ϕ s 0.12±0.25(stat)±0.05(syst)  rad
ΔΓ s 0.053±0.021(stat)±0.010(syst)  ps −1
Γ s 0.677±0.007(stat)±0.004(syst)  ps −1
|A ∥ (0)| 2 0.220±0.008(stat)±0.009(syst)
|A 0 (0)| 2 0.529±0.006(stat)±0.012(syst)
δ ⊥ =3.89±0.47(stat)±0.11(syst)  rad
where the parameter ΔΓ s is constrained to be positive. The S -wave contribution was measured and found to be compatible with zero. Results for ϕ s and ΔΓ s are also presented as 68% and 95% likelihood contours, which show agreement with the Standard Model expectations.

Item Type:

Journal Article (Original Article)


10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)
08 Faculty of Science > Other Institutions > Teaching Staff, Faculty of Science

UniBE Contributor:

Agustoni, Marco, Beck, Hans Peter, Cervelli, Alberto, Ereditato, Antonio, Gallo, Valentina, Haug, Sigve, Kruker, Tobias, Marti, Lukas, Meloni, Federico, Schneider, Basil, Sciacca, Gianfranco, Stramaglia, Maria Elena, Stucci, Stefania, Weber, Michele


500 Science > 530 Physics




American Physical Society




Jan Dirk Brinksma

Date Deposited:

10 Jun 2015 09:54

Last Modified:

02 Mar 2023 23:26

Publisher DOI:


Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.





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