Journal article
Search for B0 decays to invisible final states at Belle
CL Hsu, P Chang, I Adachi, H Aihara, K Arinstein, DM Asner, V Aulchenko, T Aushev, AM Bakich, B Bhuyan, M Bischofberger, A Bondar, G Bonvicini, A Bozek, M Bračko, TE Browder, MC Chang, Y Chao, V Chekelian, A Chen Show all
Physical Review D Particles Fields Gravitation and Cosmology | Published : 2012
Abstract
We report a search for B0 decays into invisible final states using a data sample of 657×106 BB̄ 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. © 2012 American Physical Society.
Grants
Awarded by National Science Foundation
Funding Acknowledgements
We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET4 network support. We acknowledge support from MEXT, JSPS, and Nagoya's TLPRC (Japan); ARC and DIISR (Australia); NSFC (China); MSMT (Czechia); DST (India); INFN (Italy); MEST, NRF, BRL program with Grant No. KRF-2011-0020333, GSDC of KISTI, and WCU (Korea); MNiSW (Poland); MES and RFAAE (Russia); ARRS (Slovenia); SNSF (Switzerland); NSC and MOE (Taiwan); and DOE and NSF (USA).