Dubey S.; Browder T.E.; Aihara H.; Al Said S.; Asner D.M.; Aushev T.; Ayad R.; Babu V.; Bahinipati p. ; et all.2025-02-1720213http://dx.doi.org/10.1103/PhysRevD.104.012007https://idr.iitbbs.ac.in/handle/2008/3405We report the first search for the penguin-dominated process Bs0???Xss� using a semi-inclusive method. A 121.4 fb-1 integrated luminosity ?(5S) data set collected by the Belle experiment, at the KEKB asymmetric-energy e+e- collider, is used. We observe no statistically significant signal and, including all uncertainties, we set a 90% confidence level upper limit on the partial branching fraction at 1.4�10-3 for M(Xss�)?2.4 GeV/c2. � 2021 authors. Published by the American Physical Society.enArticle