Search for invisible Higgs boson decays in e+e- collisions at centre-of-mass energies up to 184 GeV

• Main Authors: BARATE, R., THULASIDAS, Manoj
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 1999
• Subjects: Databases and Information Systems; Programming Languages and Compilers
• Online Access: https://ink.library.smu.edu.sg/sis_research/5751; https://ink.library.smu.edu.sg/context/sis_research/article/6754/viewcontent/Search_for_invisible_Higgs_boson_decays_in_e_e__collisions_at_centre_of_mass_energies_up_to_184_GeV.pdf
• Institution: Singapore Management University

In a data sample of 78.3 pb−1 collected in 1996 and 1997 by the ALEPH detector at centre-of-mass energies from 161 to 184 GeV, invisible decays of a Higgs boson have been searched for in the reaction e+e− → hZ, where the Z can decay into e+e−, µ+µ− or q¯q. No evidence for a signal is found and limits on the production cross section are derived as a function of the Higgs boson mass. These results are combined with those obtained in an update of the analyses of the ALEPH data taken at LEP 1. For a production cross section equal to that of the minimal standard model Higgs boson, masses below 80 GeV/c2 are excluded at 95% C.L.