A binned Dalitz plot analysis of the decays B0 → DK∗0, with D → KS0π+π− and D → KS0K+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±0.17 and δB0=(204−20+21)°. The parameters rB0 and δB0 are the magnitude ratio and strong phase difference between the suppressed and favoured B0 decay amplitudes, and have been measured in a region of ±50 MeV/c2 around the K∗(892)0 mass and with the magnitude of the cosine of the K∗(892)0 helicity angle larger than 0.4.

The LHCb collaboration, N., Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., et al. (2016). 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(6) [10.1007/JHEP06(2016)131].

Model-independent measurement of the CKM angle γ using B0 → DK∗0 decays with D → K S0 π + π − and K S0 K+K−

BELLOLI, NICOLETTA;Borsato, M;CALVI, MARTA;CARNITI, PAOLO;CASSINA, LORENZO;FAZZINI, DAVIDE;GOTTI, CLAUDIO;Martinelli, M;Petruzzo, M;
2016

Abstract

A binned Dalitz plot analysis of the decays B0 → DK∗0, with D → KS0π+π− and D → KS0K+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±0.17 and δB0=(204−20+21)°. The parameters rB0 and δB0 are the magnitude ratio and strong phase difference between the suppressed and favoured B0 decay amplitudes, and have been measured in a region of ±50 MeV/c2 around the K∗(892)0 mass and with the magnitude of the cosine of the K∗(892)0 helicity angle larger than 0.4.
Articolo in rivista - Articolo scientifico
B physics; CKM angle gamma; CP violation; Flavor physics; Hadron-Hadron scattering (experiments); Nuclear and High Energy Physics;
English
2016
2016
6
131
open
The LHCb collaboration, N., Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., et al. (2016). 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(6) [10.1007/JHEP06(2016)131].
File in questo prodotto:
File Dimensione Formato  
10281-133021.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 1.4 MB
Formato Adobe PDF
1.4 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/133021
Citazioni
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 14
Social impact