This paper presents a study of the charmless three-body decays Bs0→KS0h+h′− (where h(′) = π, K), using a sample of pp collision data collected by the LHCb experiment during Runs 1 and 2 of the LHC, corresponding to an integrated luminosity of 9 fb−1. The decay Bs0→KS0K+K− is observed for the first time, and the following ratios of branching fractions are measured: (Formula presented.) where the uncertainties are statistical, systematic, and due to knowledge of the ratio of hadronisation fractions of the Bs0 and B0 mesons, respectively.
Improved branching-fraction measurements of Bs0->KS0h+h′- decays and first observation of Bs0->KS0K+K-
Bassi G.Membro del Collaboration Group
;Kleijne N.Membro del Collaboration Group
;Morello M. J.Membro del Collaboration Group
;Passaro D.Membro del Collaboration Group
;Pica L.Membro del Collaboration Group
;Riccardi D.Membro del Collaboration Group
;
2026
Abstract
This paper presents a study of the charmless three-body decays Bs0→KS0h+h′− (where h(′) = π, K), using a sample of pp collision data collected by the LHCb experiment during Runs 1 and 2 of the LHC, corresponding to an integrated luminosity of 9 fb−1. The decay Bs0→KS0K+K− is observed for the first time, and the following ratios of branching fractions are measured: (Formula presented.) where the uncertainties are statistical, systematic, and due to knowledge of the ratio of hadronisation fractions of the Bs0 and B0 mesons, respectively.File in questo prodotto:
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JHEP07(2026)071(1).pdf
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