Search for the standard model Higgs boson in e + e interactions at ( 7 = 189 GeV L 3 Collaboration

A search for the Standard Model Higgs boson is carried out on 176.4pb y 1 23456789of data collected by the L3 detector at a center-of-mass energy of 189 GeV. The data are consistent with the expectations of Standard Model processes and no evidence of a Higgs signal is observed. Combining the results of this search with those at lower center-of-mass energies, a lower limit on the mass of the Standard Model Higgs boson of 95.3 GeV is set at the 95% confidence level. © 1999 Elsevier Science B.V. All rights reserved. 1 Also supported by CONICET and Universidad Nacional de La Plata, CC 67, 1900 La Plata, Argentina. 2 Also supported by Panjab University, Chandigarh-160014, India. 3 Supported by Deutscher Akademischer Austauschdienst. 4 Also supported by the Hungarian OTKA fund under contract numbers T22238 and T026178. 5 Deceased. 6 Supported by the German Bundesministerium fur Bildung, Wissenschaft, Forschung und Technologie. 7 Supported by the National Natural Science Foundation of China. 8 Supported by the Hungarian OTKA fund under contract num­ bers T019181, F023259 and T024011. 9 Supported also by the Comisión Interministerial de Ciencia y Tecnología.