WEI-SHU HOUKAI-FENG CHEN2019-12-272019-12-272007https://scholars.lib.ntu.edu.tw/handle/123456789/442662Search for invisible decay of the Υ(1S)journal article10.1103/PhysRevLett.98.1320012-s2.0-33947709013https://www.scopus.com/inward/record.uri?eid=2-s2.0-33947709013&doi=10.1103%2fPhysRevLett.98.132001&partnerID=40&md5=e600402338e0abe43e7e0d29f1fdb070