Bhuyan, B. et al. (Belle Collaboration)B. et al. (Belle Collaboration)BhuyanWEI-SHU HOU2022-04-252022-04-25202224700010https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123840317&doi=10.1103%2fPhysRevD.105.012007&partnerID=40&md5=70c3c7666fa487cc85a0299ce2d1eeb7https://scholars.lib.ntu.edu.tw/handle/123456789/606724We report results from a search for the decay Bs0→ηη using 121.4 fb-1 of data collected at the (5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We do not observe any signal and set an upper limit on the branching fraction of 14.3×10-5 at 90% confidence level. This result represents a significant improvement over the previous most stringent limit. ? 2022 authors. Published by the American Physical Society.journal article10.1103/PhysRevD.105.0120072-s2.0-85123840317