%0 Journal Article
%T First measurement of the CP-violating phase in B-s(0) -> J/Psi (-> e(+) e(-))phi decays
%A LHCb Collaboration (Aaij, R. et al
%A Henry, L.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%J European Physical Journal C
%D 2021
%V 81
%N 11
%I Springer
%@ 1434-6044
%G English
%F LHCbCollaborationAaij_etal2021
%O WOS:000722225100003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5033), last updated on Wed, 14 Dec 2022 10:39:29 +0000
%X A flavour-tagged time-dependent angular analysis of B-s(0) -> J/Psi phi decays is presented where the J/Psi meson is reconstructed through its decay to an e(+)e(-) pair. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and 8TeV, corresponding to an integrated luminosity of 3 fb(-1). The CP-violating phase and lifetime parameters of the B-s(0) s system are measured to be phi(s) = 0.00 +/- 0.28 +/- 0.07 rad, Delta Gamma(s) = 0.115 +/- 0.045 +/- 0.011 ps(-1) and Delta Gamma(s) = 0.608 +/- 0.018 +/- 0.012 ps(-1) where the first uncertainty is statistical and the second systematic. This is the first time that CP-violating parameters are measured in the B-s(0) -> J/Psi phi decay with an e+e- pair in the final state. The results are consistent with previous measurements in other channels and with the Standard Model predictions.
%R 10.1140/epjc/s10052-021-09711-7
%U https://arxiv.org/abs/2105.14738
%U https://doi.org/10.1140/epjc/s10052-021-09711-7
%P 1026-18pp