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Search for the decay B_s⁰rightarrowηη

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arxiv 2111.14437 v2 pith:3NVJMSSJ submitted 2021-11-29 hep-ex

Search for the decay B_s⁰rightarrowηη

Belle Collaboration: B. Bhuyan , K. J. Nath , J. Borah , I. Adachi , H. Aihara , S. Al Said , D. M. Asner , H. Atmacan
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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. Bra\v{c}ko T. E. Browder M. Campajola D. \v{C}ervenkov 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. Dole\v{z}al 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. Kody\v{s} S. Korpar D. Kotchetkov P. Kri\v{z}an 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. Stari\v{c} 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
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classification hep-ex
keywords decaylimitrightarrowsearchasymmetric-energybellebranchingcollected
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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