Journal article
Search for D-0 decays to invisible final states at Belle
Y-T Lai, M-Z Wang, I Adachi, H Aihara, S Al Said, DM Asner, T Aushev, R Ayad, I Badhrees, AM Bakich, V Bansal, E Barberio, M Berger, V Bhardwaj, B Bhuyan, J Biswal, A Bobrov, A Bozek, M Bracko, D Cervenkov Show all
PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2017
Abstract
We report the result from the first search for D0 decays to invisible final states. The analysis is performed on a data sample of 924fb−1 collected at and near the Υ(4S) and Υ(5S) resonances with the Belle detector at the KEKB asymmetric-energy e+e−collider. The absolute branching fraction is determined using an inclusive D0 sample, obtained by fully reconstructing the rest of the particle system including the other charmed particle. No significant signal yield is observed and an upper limit of 9.4×10−5 is set on the branching fraction of D0 to invisible final states at 90% confidence level.
Grants
Awarded by Austrian Science
Awarded by National Natural Science Foundation of China
Awarded by Ministry of Education, Youth and Sports of the Czech Republic
Awarded by Ministry of Education, National Research Foundation (NRF) of Korea
Awarded by Basic Research Lab program under NRF
Awarded by Center for Korean J-PARC Users
Awarded by Basque Foundation for Science and the Euskal Herriko Unibertsitatea (UPV/EHU)
Awarded by Grants-in-Aid for Scientific Research
Funding Acknowledgements
We thank the KEKB group for the excellent operation of the accelerator; the KEK cryogenics group for the efficient operation of the solenoid; the KEK computer group, the National Institute of Informatics, and the PNNL/EMSL computing group for valuable computing and SINET4 network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan, the Japan Society for the Promotion of Science (JSPS), and the Tau-Lepton Physics Research Center of Nagoya University; the Australian Research Council; Austrian Science Fund under Grants No. P 22742-N16 and No. P26794-N20; the National Natural Science Foundation of China under Contracts No. 10575109, No. 10775142, No. 10875115, No. 11175187, No. 11475187 and No. 11575017; the Chinese Academy of Science Center for Excellence in Particle Physics; the Ministry of Education, Youth and Sports of the Czech Republic under Contract No. LG14034; the Carl Zeiss Foundation, the Deutsche Forschungsgemeinschaft, the Excellence Cluster Universe, and the VolkswagenStiftung; the Department of Science and Technology of India; the Istituto Nazionale di Fisica Nucleare of Italy; the WCU program of the Ministry of Education, National Research Foundation (NRF) of Korea Grants No. 2011-0029457, No. 2012-0008143, No. 2012R1A1A2008330, No. 2013R1A1A3007772, No. 2014R1A2A2A01005286, No. 2014R1A2A2A01002734, No. 2015R1A2A2A01003280, No. 2015H1A2A1033649; the Basic Research Lab program under NRF Grant No. KRF-2011-0020333, Center for Korean J-PARC Users, Grant No. NRF-2013K1A3A7A06056592; the Brain Korea 21-Plus program and Radiation Science Research Institute; the Polish Ministry of Science and Higher Education and the National Science Center; the Ministry of Education and Science of the Russian Federation and the Russian Foundation for Basic Research; the Slovenian Research Agency; Ikerbasque, Basque Foundation for Science and the Euskal Herriko Unibertsitatea (UPV/EHU) under Program No. UFI 11/55 (Spain); the Swiss National Science Foundation; the Ministry of Education and the Ministry of Science and Technology of Taiwan; and the U.S. Department of Energy and the National Science Foundation. This work is supported by a Grant-in-Aid from MEXT for Science Research in a Priority Area ("NewDevelopment of Flavor Physics") and from JSPS for Creative Scientific Research ("Evolution of Tau-leptonPhysics").