Villa, S.S.VillaWEI-SHU HOU et al.2019-12-272019-12-27200615507998https://scholars.lib.ntu.edu.tw/handle/123456789/442703https://www.scopus.com/inward/record.uri?eid=2-s2.0-33645462508&doi=10.1103%2fPhysRevD.73.051107&partnerID=40&md5=5cd615263e3b9e31cb74305d6cc8d109The rare decay B0→γγ is searched for in 104fb-1 of data, corresponding to 111×106BB̄ pairs, collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No evidence for the signal is found, and an upper limit of 6.2×10-7 at 90% confidence level is set for the corresponding branching fraction. © 2006 The American Physical Society.journal article10.1103/PhysRevD.73.0511072-s2.0-33645462508WOS:000172642100010https://www.scopus.com/inward/record.uri?eid=2-s2.0-33645462508&doi=10.1103%2fPhysRevD.73.051107&partnerID=40&md5=5cd615263e3b9e31cb74305d6cc8d109