Combined analysis of Belle and Belle II data to determine the CKM angle ϕ <inf>3</inf> using B <sup>+</sup> → D(KS0 h <sup>+</sup> h <sup> −</sup>)h <sup>+</sup> decays

Date Issued
01-02-2022
Author(s)
Abudinén, F.
Aggarwal, L.
Ahmed, H.
Aihara, H.
Akopov, N.
Al Said, S.
Aloisio, A.
Anh Ky, N.
Asner, D. M.
Atmacan, H.
Aushev, V.
Ayad, R.
Babu, V.
Bacher, S.
Baehr, S.
Bahinipati, S.
Bambade, P.
Banerjee, Sw
Bansal, S.
Baudot, J.
Becker, J.
Behera, P. K.
Belous, K.
Bennett, J. V.
Bernlochner, F. U.
Bertemes, M.
Bertholet, E.
Bessner, M.
Bettarini, S.
Bianchi, F.
Bilka, T.
Biswas, D.
Bobrov, A.
Bodrov, D.
Bonvicini, G.
Borah, J.
Bozek, A.
BraÄ ko, M.
Branchini, P.
Briere, R. A.
Browder, T. E.
Budano, A.
Bussino, S.
Campajola, M.
Cao, L.
Casarosa, G.
Cecchi, C.
ÄŒervenkov, D.
Cheema, P.
Chekelian, V.
Chen, A.
Cheon, B. G.
Chilikin, K.
Chirapatpimol, K.
Cho, H. E.
Cho, S. J.
Choi, S. K.
Choi, Y.
Choudhury, S.
Cinabro, D.
Corona, L.
Cunliffe, S.
Czank, T.
Das, S.
Dattola, F.
De La Cruz-Burelo, E.
de Marino, G.
Maurya, S. K.
De Nardo, G.
De Nuccio, M.
De Pietro, G.
de Sangro, R.
Destefanis, M.
Dey, S.
De Yta-Hernandez, A.
Dhamija, R.
Di Canto, A.
Doležal, Z.
Domínguez Jiménez, I.
Dong, T. V.
Dorigo, M.
Dossett, D.
Dubey, S.
Dujany, G.
Eliachevitch, M.
Epifanov, D.
Feichtinger, P.
Ferlewicz, D.
Fillinger, T.
Fiore, S.
Fodor, A.
Forti, F.
Fulsom, B. G.
Gabrielli, A.
Ganiev, E.
Garcia-Hernandez, M.
Gaur, V.
Gaz, A.
Giordano, R.
Giri, A.
DOI
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 (KS0h+h−)h+, where D is either a D0 or D¯ 0 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 corresponding 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. [Figure not available: see fulltext.]
Volume
2022
Subjects