Observations of the singly Cabibbo-suppressed decays Ξc →pKS0, Ξc →Λπ , and Ξc →Σ0π at Belle and Belle II

I Adachi; L Aggarwal; N Akopov; M Alhakami; A Aloisio; N Althubiti; N Anh Ky; DM Asner; H Atmacan; T Aushev; V Aushev; M Aversano; R Ayad; V Babu; NK Baghel; S Bahinipati; P Bambade; S Banerjee; M Barrett; J Baudot; A Baur; A Beaubien; J Becker; JV Bennett; V Bertacchi; M Bertemes; E Bertholet; M Bessner; S Bettarini; B Bhuyan; F Bianchi; D Biswas; A Bobrov; D Bodrov; A Bolz; A Bondar; J Borah; A Boschetti; A Bozek; P Branchini; RA Briere; TE Browder; A Budano; S Bussino; Q Campagna; M Campajola; G Casarosa; C Cecchi; J Cerasoli; MC Chang; R Cheaib; P Cheema; K Chilikin; K Chirapatpimol; HE Cho; K Cho; SJ Cho; SK Choi; S Choudhury; 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; F Di Capua; J Dingfelder; Z Doležal; I Domínguez Jiménez; TV Dong; M Dorigo; D Dossett; K Dugic; G Dujany; P Ecker; D Epifanov; P Feichtinger; T Ferber; T Fillinger; G Finocchiaro; F Forti; BG Fulsom; A Gabrielli; M Garcia-Hernandez; G Gaudino; V Gaur; A Gaz; A Gellrich; G Ghevondyan; D Ghosh; H Ghumaryan; G Giakoustidis; R Giordano; A Giri; P Gironella Gironell; B Gobbo

Journal article

Observations of the singly Cabibbo-suppressed decays Ξc →pKS0, Ξc →Λπ , and Ξc →Σ0π at Belle and Belle II

I Adachi, L Aggarwal, N Akopov, M Alhakami, A Aloisio, N Althubiti, N Anh Ky, DM Asner, H Atmacan, T Aushev, V Aushev, M Aversano, R Ayad, V Babu, NK Baghel, S Bahinipati, P Bambade, S Banerjee, M Barrett, J Baudot Show all

Journal of High Energy Physics | Springer Science and Business Media LLC | Published : 2025

DOI: 10.1007/JHEP03(2025)061

Abstract

Using data samples of 983.0 fb−1 and 427.9 fb−1 accumulated with the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy e+e− colliders, singly Cabibbo-suppressed decays Ξc+→pKS0, Ξc+→Λπ+, and Ξc+→Σ0π+ are observed for the first time. The ratios of branching fractions of Ξc+→pKS0, Ξc+→Λπ+, and Ξc+→Σ0π+ relative to that of Ξc+→Ξ−π+π+ are measured to be (Formula presented.) Multiplying these values by the branching fraction of the normalization channel, BΞc+→Ξ−π+π+=2.9±1.3%, the absolute branching fractions are determined to be (Formula presented.) The first and second uncertainties above are statistical and systematic, respectively, while the third ones arise fr..

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