Search for Bs0 →η′Xs s ¯ at Belle using a semi-inclusive method SEARCH for Bs0 →η′Xs s ¯ ... DUBEY et al.

Dubey S et al.WEI-SHU HOU2022-04-252022-04-25202124700010https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111020574&doi=10.1103%2fPhysRevD.104.012007&partnerID=40&md5=83d6a27afd66a1328a1ab275b08902a2https://scholars.lib.ntu.edu.tw/handle/123456789/606776We report the first search for the penguin-dominated process Bs0→η′Xss¯ using a semi-inclusive method. A 121.4 fb-1 integrated luminosity ?(5S) data set collected by the Belle experiment, at the KEKB asymmetric-energy e+e- collider, is used. We observe no statistically significant signal and, including all uncertainties, we set a 90% confidence level upper limit on the partial branching fraction at 1.4×10-3 for M(Xss¯)?2.4 GeV/c2. ? 2021 authors. Published by the American Physical Society.Search for Bs0 →η′Xs s ¯ at Belle using a semi-inclusive method SEARCH for Bs0 →η′Xs s ¯ ... DUBEY et al.journal article10.1103/PhysRevD.104.0120072-s2.0-85111020574