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)°, 0=0.56±0.17 and 0=(204+21−20)∘ . The parameters 0 and 0 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.

Model-independent measurement of the CKM angle γ using B0→ DK∗0decays with D → K<inf>S</inf>0π+π−and K<inf>S</inf>0K+K− / The LHCb, C., Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2016:6(2016). [10.1007/JHEP06(2016)131]

Model-independent measurement of the CKM angle γ using B0→ DK∗0decays with D → KS0π+π−and KS0K+K−

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2016

Abstract

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)°, 0=0.56±0.17 and 0=(204+21−20)∘ . The parameters 0 and 0 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.
2016
B physics CKM angle gamma CP violation Flavor physics Hadron-Hadron scattering (experiments)
01 Pubblicazione su rivista::01a Articolo in rivista
Model-independent measurement of the CKM angle γ using B0→ DK∗0decays with D → K<inf>S</inf>0π+π−and K<inf>S</inf>0K+K− / The LHCb, C., Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2016:6(2016). [10.1007/JHEP06(2016)131]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074172
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