Search for neutral Higgs bosons from supersymmetry in Z decays
D Decamp, B Deschizeaux, JP Lees, MN Minard, JM Crespo, M Delfino, E Fernandez, M Martinez, R Miquel, LM Mir, S Orteu, A Pacheco, JA Perlas, E Tubau, MG Catanesi, M De Palma, A Farilla, G Iaselli, G Maggi, S Natali Show all
Physics Letters B | Published : 1990
The light scalar Higgs boson h and the pseudoscalar Higgs boson A of the minimal supersymmetric standard model have been searched for in the processes e+e-→hff and e+e-→hA using data collected by ALEPH at the LEP e+e- collider, with center of mass energies at and near the Z peak. Using a variety of signatures adapted to various mass ranges for h and A, we have excluded a large domain in the parameter space. For large values of ν2 ν1, the ratio of the vacuum expectation values of the two Higgs fields, the whole range from 0 to 38.8 GeV is excluded for Mh and MA at 95% CL. © 1990.