Search for the decay B-s(0) -> eta eta

Belle Collaboration,B. Bhuyan, K. J. Nath, J. Borah,I. Adachi, H. Aihara,S. Al Said,D. M. Asner, H. Atmacan, V. Aulchenko,T. Aushev, R. Ayad, V. Babu,I. Badhrees,A. M. Bakich,P. Behera,J. Bennett,V. Bhardwaj, T. Bilka, J. Biswal,A. Bobrov,A. Bozek,M. Bračko,T. E. Browder,M. Campajola, D. Červenkov, V. Chekelian,A. Chen,B. G. Cheon,K. Chilikin,K. Cho,S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro,S. Cunliffe,N. Dash,F. Di Capua,S. Di Carlo,Z. Doležal, T. V. Dong,S. Dubey,S. Eidelman,J. E. Fast, T. Ferber,B. G. Fulsom,V. Gaur, N. Gabyshev, A. Garmash,A. Giri, P. Goldenzweig, B. Golob, J. Haba, T. Hara,O. Hartbrich, K. Hayasaka,H. Hayashii,W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh,M. Iwasaki, Y. Iwasaki,W. W. Jacobs, S. Jia, Y. Jin,D. Joffe,K. K. Joo,A. B. Kaliyar, K. H. Kang, G. Karyan,T. Kawasaki, H. Kichimi,C. Kiesling,D. Y. Kim, H. J. Kim,K. T. Kim, S. H. Kim,K. Kinoshita,P. Kodyš,S. Korpar, D. Kotchetkov,P. Križan,R. Kroeger,P. Krokovny, R. Kumar, A. Kuzmin,Y. -J. Kwon, J. S. Lange, J. K. Lee,J. Y. Lee,S. C. Lee,C. H. Li,L. K. Li,Y. B. Li,L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, P. -C. Lu,T. Luo,J. MacNaughton,C. MacQueen,M. Masuda, D. Matvienko,M. Merola, K. Miyabayashi,H. Miyata,R. Mizuk,G. B. Mohanty, T. Mori, R. Mussa,T. Nakano, M. Nakao, M. Nayak, M. Niiyama,N. K. Nisar, S. Nishida,K. Ogawa,S. Ogawa,H. Ono, Y. Onuki,P. Pakhlov,G. Pakhlova, B. Pal,T. Pang,S. Pardi, H. Park,S. Patra,S. Paul,T. K. Pedlar, R. Pestotnik,L. E. Piilonen,V. Popov, E. Prencipe,M. Ritter, A. Rostomyan,G. Russo, Y. Sakai,M. Salehi,S. Sandilya,L. Santelj, T. Sanuki,V. Savinov, O. Schneider, G. Schnell, J. Schueler,C. Schwanda, Y. Seino,K. Senyo,M. E. Sevior, V. Shebalin,C. P. Shen,J. -G. Shiu,E. Solovieva,M. Starič, T. Sumiyoshi, W. Sutcliffe,M. Takizawa,U. Tamponi,K. Tanida, F. Tenchini,K. Trabelsi,M. Uchida,T. Uglov, Y. Unno,S. Uno, P. Urquijo,Y. Usov, S. E. Vahsen,R. Van Tonder, G. Varner,A. Vossen,C. H. Wang, M. -Z. Wang, P. Wang, J. Wiechczynski, E. Won, S. B. Yang,H. Ye, J. H. Yin, Y. Yusa, Z. P. Zhang,V. Zhilich,V. Zhukova

PHYSICAL REVIEW D(2022)

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摘要
We report results from a search for the decay B-s(0) -> 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 x 10(-5) at 90% confidence level. This result represents a significant improvement over the previous most stringent limit.
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