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Kroeger, R. Kulasiri, R. Kumar, R. Mizuk, R. Pestotnik, R. van Tonder, S. Al Said, S. Bahinipati, S. Bilokin, S. B. Yang, S. Choudhury, S. C. Lee, S. Cunliffe, S. Das, S. Eidelman, S. E. Vahsen, S. H. Kim, S.-H. Park, S. Korpar, S. Mohanty, S. Nishida, S. Ogawa, S. Pardi, S. Sandilya, S. Uno, S. Watanuki, T. Aushev, T. D. Kimmel, T. E. Browder, T. Ferber, T. J. Moon, T. Kawasaki, T. K. Pedlar, T. Kuhr, T. Matsuda, T. Podobnik, T. Sanuki, U. Tamponi, V. Babu, V. Gaur, V. Savinov, V. Zhilich, V. Zhukova, W.-S. Hou, W. Yan, X. Xu, Y. B. Li, Y. Choi, Y. Guan, Y. Iwasaki, Y. Jin, Y.-J. Kwon, Y.-K. Kim, Y. Onuki, Y. Sakai, Y. Seino, Y. Tao, Y. Unno, Y. Ushiroda, Y. Usov, Z. Dole\\v{z}al, Z. P. Zhang, Z. S. Stottler","submitted_at":"2021-02-20T06:10:57Z","abstract_excerpt":"We report the first search for the penguin-dominated process $B_{s}^{0} \\rightarrow \\eta^{\\prime} X_{s\\bar{s}}$ using a semi-inclusive method. 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