Abraham, N L, Allbrooke, B M M, Asquith, L, Cerri, A, De Santo, A, Grandi, M, Jones, S D, Kelsey, D, Lerner, G, Miano, F, Safarzadeh Samani, B, Salvatore, F, Shaw, K, Spina, M, Stevenson, T J, Suruliz, K, Sutton, M R, Tresoldi, F, Trovato, F, ATLAS Collaboration, and others, (2021) Measurement of the CP-violating phase ϕ<inf>s</inf> in Bs0→J/ψϕ decays in ATLAS at 13 TeV. European Physical Journal C, 81. a342 1-36. ISSN 1434-6044

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Abstract

A 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.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor:	Mx Elements Account
Depositing User:	Mx Elements Account
Date Deposited:	07 Sep 2021 08:03
Last Modified:	25 Oct 2021 16:33
URI:	http://sro.sussex.ac.uk/id/eprint/101554

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