Search for $B^{0}$ decays to invisible final states
C.-L. Hsu,T. Iwashita,Y. Chao,S. Esen,D. Liventsev,Byeong Rok Ko,S. E. Vahsen,D. Epifanov,H. Kichimi,V. Chekelian,R. Pestotnik,Stephen Lars Olsen,K. Hayasaka,T. Uglov,V. Vorobyev,Dipanwita Dutta,Y. Choi,S. H. Lee,Jeremy Dalseno,J. B. Singh,Peter Kodys,H. Park,T. Sumiyoshi,S. Okuno,G. B. Mohanty,K. Cho,B. G. Cheon,P. Wang,Z. Q. Liu,Y. Teramoto,B. Shwartz,K. Arinstein,T. Iijima,A. Ishikawa,A. Bozek,J. Libby,H. J. Hyun,Y. Watanabe,Y-J Kwon,M. Sumihama,James E. Fast,J. Li,M. Uchida,V.N. Zhilich,Y. Miyazaki,H. Hayashii,J. B. Kim,Y. Sakai,J. Haba,Samo Korpar,Marko Petrič,K. Inami,T. Julius,Tagir Aushev,G. Bonvicini,E. Solovieva,Leo Piilonen,Martin Ritter,T. K. Pedlar,G. Varner,E. Won,O. Schneider,M. Bračko,H. Farhat,Z. Natkaniec,V. M. Aulchenko,A. Moll,Po-Hsun Chen,I. Adachi,Yang Li,M. E. Sevior,T.-A. Shibata,H. Miyata,O. Nitoh,M. Starič,Y. Unno,Y. S. Sohn,K. M. Williams,P. Chang,Y. Hoshi,P. Smerkol,M. Watanabe,Z. P. Zhang,H. Sahoo,G. Tatishvili,P. Vanhoefer,R. Gillard,Semen Eidelman,C. W. Park,V. V. Zhulanov,S. Uno,M. Nakao,C. Schwanda,Hiroaki Aihara,H. Kim,H. Yamamoto,T. Sanuki,Yasuyuki Horii,H. K. Park,A. Chen Physical Review D（2012）
Abstract
We report a search for B0 decays into invisible final states using a data sample of 657×106 B¯¯¯B pairs collected at the Υ(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 1.3×10−4 at the 90% confidence level for the branching fraction of invisible B0 decay.Received 26 June 2012DOI:https://doi.org/10.1103/PhysRevD.86.032002© 2012 American Physical Society
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Key words
invisible final states,forb0decays,search
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