Search for $B^{0}$ decays to invisible final states at Belle

C L Hsu,P Chang,I Adachi,H Aihara,K Arinstein,D M Asner,V Aulchenko,T Aushev,A M Bakich,B Bhuyan,M Bischofberger,A Bondar,G Bonvicini,A Bozek,M Bracko,T E Browder,M C Chang,Y Chao,V Chekelian,A Chen,Peng Chen,B G Cheon,K Chilikin,I S Cho,K Cho,Yanghee Choi,J Dalseno,J Dingfelder,Z Doležal,Z Drasal,D Dutta,S Eidelman,D Epifanov,S Esen,H Farhat,J Fast,V Gaur,N Gabyshev,R Gillard,Y M Goh,J Haba,T Hara,K Hayasaka,H Hayashii,Y Horii,Y Hoshi,W S Hou,Y B Hsiung, H J Hyun,Takashi Iijima,K Inami,A Ishikawa,R Itoh,M Iwabuchi,Y Iwasaki,Takashi Iwashita,T Julius,J H Kang,T Kawasaki,H Kichimi,C Kiesling, Hea Ok Kim,J H Kim,K T Kim,Y J Kim,B R Ko,P Kodys,S Korpar,P Krokovny,T Kuhr,A Kuzmin,P Kvasnicka,Y J Kwon,S H Lee,Jingjing Li,Yuan Li,J Libby,Yu Liu,Z Q Liu,D Liventsev,R Louvot,K Miyabayashi,H Miyata,Y Miyazaki,G B Mohanty,A Moll,N Muramatsu,E Nakano,M Nakao,Z Natkaniec,C Ng,S Nishida,O Nitoh,T Ohshima,S Okuno,S L Olsen,G Pakhlova

PHYSICAL REVIEW D（2012）

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摘要

We report a search for B-0 decays into invisible final states using a data sample of 657 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e(+) e(-) collider. The signal is identified by fully reconstructing a hadronic decay of the accompanying B meson and requiring no other particles in the event. No significant signal is observed, and we obtain an upper limit of 1.3 x 10(-4) at the 90% confidence level for the branching fraction of invisible B-0 decay.

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