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Title: | Model-independent measurement of the CKM angle γ using B0 → DK∗0 decays with D → K S0 π + π − and K S0 K+K− |
Author: | 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 |
Keywords: | Interaccions d'hadrons Violació CP (Física nuclear) Hadron interactions CP violation (Nuclear physics) |
Issue Date: | 21-Jun-2016 |
Publisher: | Springer Verlag |
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)°, 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP06(2016)131 |
It is part of: | Journal of High Energy Physics, 2016, vol. 2016, num. 131 |
URI: | http://hdl.handle.net/2445/119381 |
Related resource: | https://doi.org/10.1007/JHEP06(2016)131 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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