Aad, G.Abbott, B.Abbott, D.C.Abdinov, O.Abud, A.A.Abeling, K.Abhayasinghe, D.K.Abidi, S.H.AbouZeid, O.S.Abraham, N.L.Abramowicz, H.Abreu, H.Abulaiti, Y.Acharya, B.S.Achkar, B.Adachi, S.Adam, L.Bourdarios, C.A.Adamczyk, L.Adamek, L.Adelman, J.Adersberger, M.Adiguzel, A.Adorni, S.2021-05-192021-05-192021-04European Physical Journal C, Volume 81, Issue 4, April 2021, Article number 34214346044http://repositorio.unab.cl/xmlui/handle/ria/18889Indexación ScopusA measurement of the Bs0→J/ψϕ decay parameters using 80.5fb-1 of integrated luminosity collected with the ATLAS detector from 13 Te proton–proton collisions at the LHC is presented. The measured parameters include the CP-violating phase ϕs, the width difference Δ Γ s between the Bs0 meson mass eigenstates and the average decay width Γ s. The values measured for the physical parameters are combined with those from 19.2fb-1 of 7 and 8 Te data, leading to the following: ϕs=-0.087±0.036(stat.)±0.021(syst.)radΔΓs=0.0657±0.0043(stat.)±0.0037(syst.)ps-1Γs=0.6703±0.0014(stat.)±0.0018(syst.)ps-1Results for ϕs and Δ Γ s are also presented as 68% confidence level contours in the ϕs–Δ Γ s plane. Furthermore the transversity amplitudes and corresponding strong phases are measured. ϕs and Δ Γ s measurements are in agreement with the Standard Model predictions. © 2021, The Author(s).enCP ViolationQuantum ChromodynamicsMesonsArtículo10.1140/epjc/s10052-021-09011-0