A model-dependent amplitude analysis of the decay B 0 → D(K S 0π +π −)K ∗0 is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb −1, recorded at √s=7 and 8 TeV by the LHCb experiment. The CP violation observables x ± and y ±, sensitive to the CKM angle γ, are measured to bex−=−0.15±0.14±0.03±0.01,y−=0.25±0.15±0.06±0.01,x+=0.05±0.24±0.04±0.01,y+=−0.65 −0.23 +0.24±0.08±0.01, where the first uncertainties are statistical, the second systematic and the third arise from the uncertainty on the D → K S 0π +π − amplitude model. These are the most precise measurements of these observables. They correspond to γ = (80 −22 +21)° and r B 0 =0.39±0.13, where r B 0 is the magnitude of the ratio of the suppressed and favoured B 0 → DK +π − decay amplitudes, in a Kπ mass region of ±50 MeV around the K *(892) 0 mass and for an absolute value of the cosine of the K *0 decay angle larger than 0.4.[Figure not available: see fulltext.]
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics