We present a measurement of the Cabibbo-Kobayashi-Maskawa unitarity triangle angle φ3 (also known as γ) using a model-independent Dalitz plot analysis of B + → D KS0 h+ h− h+ , where D is either a D0 or D̄0 meson and h is either a π or K. This is the first measurement that simultaneously uses Belle and Belle II data, combining samples corresponding to integrated luminosities of 711 fb−1 and 128 fb−1 , respectively. All data were accumulated from energy-asymmetric e+ e− collisions at a centre-of-mass energy correspond- ing to the mass of the Υ(4S) resonance. We measure φ3 = (78.4 ± 11.4 ± 0.5 ± 1.0)◦ , where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is from the uncertainties on external measurements of the D-decay strong-phase parameters.

Abudinén, F., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Al Said, S., et al. (2022). Combined analysis of Belle and Belle II data to determine the CKM angle ϕ3 using B+ → D($$ {K}_S^0 $$h+h−)h+ decays. JOURNAL OF HIGH ENERGY PHYSICS, 2022(2) [10.1007/JHEP02(2022)063].

Combined analysis of Belle and Belle II data to determine the CKM angle ϕ3 using B+ → D($$ {K}_S^0 $$h+h−)h+ decays

Budano, A.;Bussino, S.;De Pietro, G.;
2022

Abstract

We present a measurement of the Cabibbo-Kobayashi-Maskawa unitarity triangle angle φ3 (also known as γ) using a model-independent Dalitz plot analysis of B + → D KS0 h+ h− h+ , where D is either a D0 or D̄0 meson and h is either a π or K. This is the first measurement that simultaneously uses Belle and Belle II data, combining samples corresponding to integrated luminosities of 711 fb−1 and 128 fb−1 , respectively. All data were accumulated from energy-asymmetric e+ e− collisions at a centre-of-mass energy correspond- ing to the mass of the Υ(4S) resonance. We measure φ3 = (78.4 ± 11.4 ± 0.5 ± 1.0)◦ , where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is from the uncertainties on external measurements of the D-decay strong-phase parameters.
Abudinén, F., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Al Said, S., et al. (2022). Combined analysis of Belle and Belle II data to determine the CKM angle ϕ3 using B+ → D($$ {K}_S^0 $$h+h−)h+ decays. JOURNAL OF HIGH ENERGY PHYSICS, 2022(2) [10.1007/JHEP02(2022)063].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11590/398618
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