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  • Search for the decay $B_s^0\rightarrow\eta\eta
    Borah, J; Aihara, H; Asner, D. M; Aulchenko, V; Badhrees, I; Bennett, J; Bhardwaj, V; Biswal, J; Bobrov, A; Bozek, A; Bračko, M; Browder, T. E; Campajola, M; Chen, A; Cheon, B. G; Cho, K; Cunliffe, S; Di Capua, F; Doležal, Z; Dong, T. V; Ferber, T; Fulsom, B. G; Gabyshev, N; Goldenzweig, P; Golob, B; Haba, J; Hara, T; Hayasaka, K; Hou, W. -S; Iijima, T; Inami, K; Ishikawa, A; Itoh, R; Iwasaki, Y; Jacobs, W. W; Karyan, G; Kichimi, H; Kim, D. Y; Kim, H. J; Kim, S. H; Korpar, S; Kotchetkov, D; Križan, P; Kroeger, R; Krokovny, P; Kwon, Y. -J; Lange, J. S; Lee, J. K; Lee, J. Y; Lee, S. C; Li, C. H; Li, Y. B; Gioi, L. Li; Libby, J; Lieret, K; Liventsev, D; Luo, T; MacNaughton, J; MacQueen, C; Masuda, M; Miyabayashi, K; Miyata, H; Mohanty, G. B; Mori, T; Nakao, M; Nisar, N. K; Nishida, S; Ogawa, S; Pal, B; Patra, S; Paul, S; Pedlar, T. K; Pestotnik, R; Popov, V; Russo, G; Schnell, G; Schueler, J; Senyo, K; Shebalin, V; Shiu, J. -G; Starič, M; Sumiyoshi, T; Sutcliffe, W; Tenchini, F; Unno, Y; Uno, S; Urquijo, P; Usov, Y; Van Tonder, R; Varner, G; Vossen, A; Wang, C. H; Wang, M. -Z; Won, E; Yang, S. B; Ye, H; Yusa, Y; Zhang, Z. P; Zhilich, V; Zhukova, V

    11/2021
    Journal Article

    Phys. Rev. D 105, 012007 (2022) We report results from a search for the decay $B_s^0\rightarrow\eta\eta$ using 121.4 fb$^{-1}$ of data collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We do not observe any signal and set an upper limit on the branching fraction of $14.3\times 10^{-5}$ at $90\%$ confidence level. This result represents a significant improvement over the previous most stringent limit.

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