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Regular version of the site

Article

Measurement of CP violation in B0→ D∗±D∓ decays

Journal of High Energy Physics. 2020. Vol. 03. P. 147.

The decay-time-dependent CP asymmetry in B0→D∗±D∓ decays is measured using a data set corresponding to an integrated luminosity of 9fb−1 recorded by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The CP parameters are measured as
SD∗D=−0.861±0.077(stat)±0.019(syst),
ΔSD∗D=0.019±0.075(stat)±0.012(syst),
CD∗D=−0.059±0.092(stat)±0.020(syst),
ΔCD∗D=−0.031±0.092(stat)±0.016(syst),
D∗D=0.008±0.014(stat)±0.006(syst).
The analysis provides the most precise single measurement of CP violation in this decay channel to date. All parameters are consistent with their current world average values.