A model-dependent amplitude analysis of B±→DK± with D→K0Sπ+π- decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 1fb-1, recorded by LHCb at a centre-of-mass energy of 7 TeV in 2011. Values of the CP violation observables x± and y±, which are sensitive to the CKM angle γ, are measured to be
where the first uncertainty is statistical, the second systematic and the third arises from the uncertainty of the D→K0Sπ+π- amplitude model. The value of γ is determined to be (84+49-42)°, including all sources of uncertainty. Neutral D meson mixing is found to have negligible effect.
ASJC Scopus subject areas
- Nuclear and High Energy Physics