Measurement of inclusive (Formula presented) partial branching fractions and

M Abumusabh; I Adachi; K Adamczyk; L Aggarwal; H Ahmed; Y Ahn; H Aihara; N Akopov; S Alghamdi; M Alhakami; A Aloisio; N Althubiti; K Amos; N Anh Ky; C Antonioli; DM Asner; H Atmacan; T Aushev; R Ayad; V Babu; H Bae; NK Baghel; S Bahinipati; P Bambade; S Banerjee; M Barrett; M Bartl; J Baudot; A Beaubien; F Becherer; J Becker; JV Bennett; FU Bernlochner; V Bertacchi; M Bertemes; E Bertholet; M Bessner; S Bettarini; V Bhardwaj; B Bhuyan; F Bianchi; T Bilka; D Biswas; A Bobrov; D Bodrov; G Bonvicini; J Borah; A Boschetti; A Bozek; M Bračko; P Branchini; RA Briere; TE Browder; A Budano; S Bussino; Q Campagna; M Campajola; L Cao; G Casarosa; C Cecchi; P Chang; P Cheema; L Chen; BG Cheon; C Cheshta; H Chetri; K Chilikin; J Chin; K Chirapatpimol; HE Cho; K Cho; SJ Cho; SK Choi; S Choudhury; S Chutia; J Cochran; JA Colorado-Caicedo; I Consigny; L Corona; JX Cui; E De La Cruz-Burelo; SA De La Motte; G De Nardo; G De Pietro; R de Sangro; M Destefanis; S Dey; A Di Canto; J Dingfelder; Z Doležal; I Domínguez Jiménez; TV Dong; X Dong; M Dorigo; G Dujany; P Ecker; J Eppelt; R Farkas; P Feichtinger; T Ferber

Journal article

Measurement of inclusive (Formula presented) partial branching fractions and

M Abumusabh, I Adachi, K Adamczyk, L Aggarwal, H Ahmed, Y Ahn, H Aihara, N Akopov, S Alghamdi, M Alhakami, A Aloisio, N Althubiti, K Amos, N Anh Ky, C Antonioli, DM Asner, H Atmacan, T Aushev, R Ayad, V Babu Show all

Physical Review D | American Physical Society (APS) | Published : 2026

DOI: 10.1103/59ws-zxbt

Abstract

A sample of 365 fb−1 of (Formula presented) data collected by the Belle II experiment is used to measure the partial branching fractions of charmless semileptonic B meson decays and determine the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element Vub. Events containing a signal electron or muon l and a fully reconstructed hadronic B decay that constrains the signal kinematics are selected, while the rest of the event defines the hadronic system Xu associated with the signal. To discriminate the signal from the 50-times larger background originating from CKM-favored semileptonic B decays, a template fit is performed in both signal and control regions after applying an optimized s..

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