First measurements of the branching fractions for the decay modes Ξ c 0 → Λ η and Ξ c 0 → Λ η ′ and search for the decay Ξ c 0 → Λ π 0 using Belle and Belle II data

Physical review. D/Physical review. D. 2026 Open access

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Authors: M. Abumusabh, I. Adachi, L. Aggarwal, H. Ahmed, Y. Ahn, H. Aihara, N. Akopov, S. Alghamdi, M. Alhakami, A. Aloisio, N. Althubiti, K. Amos
+88 more N. Anh Ky, C. Antonioli, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Bartl, J. Baudot, A. Beaubien, J. Becker, J. V. Bennett, F. U. Bernlochner, V. Bertacchi, E. Bertholet, M. Bessner, S. Bettarini, F. Bianchi, D. Biswas, D. Bodrov, A. Boschetti, A. Bozek, M. Bračko, P. Branchini, R. A. Briere, T. E. Browder, Antonio Budano, S. Bussino, Q. Campagna, M. Campajola, G. Casarosa, C. Cecchi, P. Cheema, L. Chen, Cheshta Cheshta, H. Chetri, Kirill Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, S. Choudhury, S. Chutia, J. A. Colorado-Caicedo, I. Consigny, Luigi Corona, J. X. Cui, S. Das, E. De La Cruz-Burelo, S. A. De La Motte, G. De Nardo, G. De Pietro, R. de Sangro, M. Destefanis, A. Di Canto, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, X. Dong, M. Dorigo, G. Dujany, P. Ecker, D. Epifanov, J. Eppelt, R. Farkas, P. Feichtinger, T. Ferber, T. Fillinger, C. Finck, G. Finocchiaro, F. Forti, B. G. Fulsom, A. Gabrielli, E. Ganiev, R. Garg, G. Gaudino, V. Gaur, V. Gautam, A. Gaz, A. Gellrich, G. Ghevondyan, D. Ghosh, H. Ghumaryan, R. Giordano
DOI: 10.1103/q4n8-fqj1
Cited by: 2
References: 48

Abstract

Using data samples of 988.4 fb − 1 and 427.9 fb − 1 collected with the Belle and Belle II detectors, we present a study of the singly Cabibbo-suppressed decays Ξ c 0 → Λ η , Λ η ′ , and Λ π 0 . We observe the decay Ξ c 0 → Λ η and find evidence for the decay Ξ c 0 → Λ η ′ , with corresponding branching ratios determined to be B ( Ξ c 0 → Λ η ) / B ( Ξ c 0 → Ξ − π + ) = ( 4.16 ± 0.91 ± 0.23 ) % and B ( Ξ c 0 → Λ η ′ ) / B ( Ξ c 0 → Ξ − π + ) = ( 2.48 ± 0.82 ± 0.12 ) % , respectively. We find no significant signal in the Ξ c 0 → Λ π 0 decay mode and set an upper limit at the 90% credibility level of B ( Ξ c 0 → Λ π 0 ) / B ( Ξ c 0 → Ξ

Fields of Study & Subjects

Particle physics theoretical and experimental studies Quantum Chromodynamics and Particle Interactions Neutrino Physics Research

Publication details

Journal / source
Physical review. D/Physical review. D.
Publisher
American Physical Society (APS)
Volume
113
Issue
3
Publication date
14 January 2026
Language
EN