A binned Dalitz plot analysis of B± → D K± decays, with D → K0S π+ π− and D → K0S K+ K−, is performed to measure the CP-violating observables x± and y±, which are sensitive to the Cabibbo-Kobayashi-Maskawa angle γ. The analysis exploits a sample of proton-proton collision data corresponding to 3.0 fb^−1 collected by the LHCb experiment. Measurements from CLEO-c of the variation of the strong-interaction phase of the D decay over the Dalitz plot are used as inputs. The values of the parameters are found to be x+ = (−7.7 ± 2.4 ± 1.0 ± 0.4) × 10^−2, x− = (2.5 ± 2.5 ± 1.0 ± 0.5) × 10^−2, y+ = (−2.2 ± 2.5 ± 0.4 ± 1.0) × 10^−2 and y− = (7.5 ± 2.9 ± 0.5 ± 1.4) × 10^−2. The first, second, and third uncertainties are the statistical, the experimental systematic, and that associated with the precision of the strong-phase parameters. These are the most precise measurements of these observables and correspond to γ = (62{−14}{+15})°, with a second solution at γ → γ + 180°, and r_B = 0.080{−0.021}{+0.019}, where r_B is the ratio between the suppressed and favoured B decay amplitudes.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). Measurement of the CKM Angle γ Using B± → D K± with D → K0S π+ π−, K0S K+ K− Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2014(10), 0-31 [10.1007/JHEP10(2014)097].

Measurement of the CKM Angle γ Using B± → D K± with D → K0S π+ π−, K0S K+ K− Decays

CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

A binned Dalitz plot analysis of B± → D K± decays, with D → K0S π+ π− and D → K0S K+ K−, is performed to measure the CP-violating observables x± and y±, which are sensitive to the Cabibbo-Kobayashi-Maskawa angle γ. The analysis exploits a sample of proton-proton collision data corresponding to 3.0 fb^−1 collected by the LHCb experiment. Measurements from CLEO-c of the variation of the strong-interaction phase of the D decay over the Dalitz plot are used as inputs. The values of the parameters are found to be x+ = (−7.7 ± 2.4 ± 1.0 ± 0.4) × 10^−2, x− = (2.5 ± 2.5 ± 1.0 ± 0.5) × 10^−2, y+ = (−2.2 ± 2.5 ± 0.4 ± 1.0) × 10^−2 and y− = (7.5 ± 2.9 ± 0.5 ± 1.4) × 10^−2. The first, second, and third uncertainties are the statistical, the experimental systematic, and that associated with the precision of the strong-phase parameters. These are the most precise measurements of these observables and correspond to γ = (62{−14}{+15})°, with a second solution at γ → γ + 180°, and r_B = 0.080{−0.021}{+0.019}, where r_B is the ratio between the suppressed and favoured B decay amplitudes.
2014
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). Measurement of the CKM Angle γ Using B± → D K± with D → K0S π+ π−, K0S K+ K− Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2014(10), 0-31 [10.1007/JHEP10(2014)097].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/363316
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