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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/119381
Model-independent measurement of the CKM angle γ using B0 → DK∗0 decays with D → K S0 π + π − and K S0 K+K−
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A binned Dalitz plot analysis of the decays B 0 → DK ∗0, with D → K S 0 π + π − and D → K S 0 K + K −, is performed to measure the observables x ± and y ±, which are related to the CKM angle γ and the hadronic parameters of the decays. The D decay strong phase variation over the Dalitz plot is taken from measurements performed at the CLEO-c experiment, making the analysis independent of the D decay model. With a sample of proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment, the values of the CP violation parameters are found to be x + = 0.05 ± 0.35 ± 0.02, x − = −0.31 ± 0.20 ± 0.04, y + = −0.81 ± 0.28 ± 0.06 and y − = 0.31 ± 0.21 ± 0.05, where the first uncertainties are statistical and the second systematic. These observables correspond to values γ = (71 ± 20)°, rB0=0.56±0.17rB0=0.56±0.17 and δB0=(204+21−20)∘δB0=(204−20+21)∘ . The parameters rB0rB0 and δB0δB0 are the magnitude ratio and strong phase difference between the suppressed and favoured B 0 decay amplitudes, and have been measured in a region of ±50 MeV/c 2 around the K ∗(892)0 mass and with the magnitude of the cosine of the K ∗(892)0 helicity angle larger than 0.4.
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BADALOV, Alexey, GARRIDO BELTRÁN, Lluís, GASCÓN FORA, David, GRACIANI DÍAZ, Ricardo, GRAUGÉS POUS, Eugeni, MARIN BENITO, Carla, PICATOSTE OLLOQUI, Eduardo, RIVES MOLINA, Vicente josé, LHCb Collaboration. Model-independent measurement of the CKM angle γ using B0 → DK∗0 decays with D → K S0 π + π − and K S0 K+K−. _Journal of High Energy Physics_. 2016. Vol. 2016, núm. 131. [consulta: 20 de gener de 2026]. ISSN: 1126-6708. [Disponible a: https://hdl.handle.net/2445/119381]