Search for b→sX+X− in exclusive decays of B mesons

Abstract Using the ARGUS detector at the e + e − storage ring DORIS II at DESY, penguin decays of B mesons involving b→sX + X − have been searched for, where X is one of e, μ , π , or K. No evidence for these decays was found and upoer limits are quoted. These numbers represent important constraints of flavour-changing neutral currents in B meson decays and probe the heavy-quark and Higgs sectors of the standard model.