Search for the decay $B^0_s \rightarrow \pi^0 \pi^0$ at Belle
Belle Collaboration,J. Borah,B. Bhuyan,I. Adachi,H. Aihara,D. M. Asner,V. Aulchenko,T. Aushev,R. Ayad,V. Babu,S. Bahinipati,Sw. Banerjee,P. Behera,K. Belous,J. Bennett,M. Bessner,V. Bhardwaj,T. Bilka,D. Biswas,D. Bodrov,A. Bozek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Červenkov,M. C. Chang,V. Chekelian,C. Chen,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. J. Cho,S. K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Das,G. De Nardo,G. De Pietro,R. Dhamija,F. Di Capua,J. Dingfelder,Z. Doležal,T. V. Dong,D. Epifanov,D. Ferlewicz,A. Frey,B. G. Fulsom,R. Garg,V. Gaur,A. Garmash,A. Giri,P. Goldenzweig,E. Graziani,T. Gu,Y. Guan,K. Gudkova,C. Hadjivasiliou,S. Halder,T. Hara,K. Hayasaka,H. Hayashii,M. T. Hedges,D. Herrmann,M. Hernández Villanueva,W. S. Hou,C. L. Hsu,T. Iijima,K. Inami,G. Inguglia,N. Ipsita,A. Ishikawa,R. Itoh,M. Iwasaki,W. W. Jacobs,E. J. Jang,Q. P. Ji,Y. Jin,K. K. Joo,D. Kalita,A. B. Kaliyar,K. H. Kang,T. Kawasaki,H. Kichimi,C. Kiesling,C. H. Kim,D. Y. Kim,K. H. Kim,Y. K. Kim,K. Kinoshita,P. Kodyš,T. Konno,A. Korobov,S. Korpar,P. Križan,P. Krokovny,T. Kuhr,M. Kumar,R. Kumar,K. Kumara,Y. J. Kwon,K. Lalwani,T. Lam,J. S. Lange,M. Laurenza,S. C. Lee,D. Levit,L. K. Li,Y. Li,L. Li Gioi,J. Libby,Y. R. Lin,D. Liventsev,T. Luo,M. Masuda,D. Matvienko,S. K. Maurya,F. Meier,M. Merola,F. Metzner,K. Miyabayashi,R. Mizuk,G. B. Mohanty,R. Mussa,I. Nakamura,M. Nakao,D. Narwal,Z. Natkaniec,A. Natochii,L. Nayak,N. K. Nisar,S. Nishida,K. Ogawa,S. Ogawa,H. Ono,Y. Onuki,P. Oskin,P. Pakhlov,G. Pakhlova,T. Pang,S. Pardi,J. Park,S. H. Park,A. Passeri,S. Patra,S. Paul,T. K. Pedlar,R. Pestotnik,L. E. Piilonen,T. Podobnik,E. Prencipe,M. T. Prim,M. Röhrken,A. Rostomyan,G. Russo,Y. Sakai,S. Sandilya,L. Santelj,V. Savinov,G. Schnell,C. Schwanda,A. J. Schwartz,Y. Seino,K. Senyo,M. E. Sevior,W. Shan,M. Shapkin,C. Sharma,C. P. Shen,J. G. Shiu,F. Simon,J. B. Singh,A. Sokolov,E. Solovieva,M. Starič,Z. S. Stottler,M. Sumihama,T. Sumiyoshi,M. Takizawa,U. Tamponi,K. Tanida,F. Tenchini,K. Trabelsi,M. Uchida,T. Uglov,Y. Unno,S. Uno,P. Urquijo,S. E. Vahsen,R. van Tonder,G. Varner,K. E. Varvell,A. Vinokurova,A. Vossen,D. Wang,M. Z. Wang,M. Watanabe,E. Won,X. Xu,B. D. Yabsley,W. Yan,S. B. Yang,J. Yelton,J. H. Yin,Y. Yook,C. Z. Yuan,L. Yuan,Y. Yusa,Z. P. Zhang,V. Zhilich,V. Zhukova
arxiv（2023）
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摘要
We report the results of the first search for the decay $B_s^0\rightarrow\pi^0\pi^0$ using $121.4\ \rm fb^{-1}$ of data collected at the $\Upsilon(5\rm S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We observe no signal and set a 90\% confidence level upper limit of $7.7\times 10^{-6}$ on the $B_s^0\rightarrow\pi^0\pi^0$ decay branching fraction.
