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Search for neutral Higgs bosons in e(+)e(-) collisions at root s=183 GeV

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Search for neutral Higgs bosons in e(+)e(-) collisions at root s=183 GeV

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DELPHI Collaboration; Alemany Fernández, Reyes; Cabrera Urbán, Susana; Castillo Giménez, María Victoria; Cortina Gil, Eduardo; Ferrer Soria, Antonio; Fuster Verdú, Juan A.; García García, Carmen; Gil Botella, Inés; Hernández Rey, Juan José; Higón Rodríguez, Emilio; Martínez Vidal, Fernando; Navas Concha, Sergio; Salt Cairols, José

Aquest document és un/a article, creat/da en: 1999

Este documento está disponible también en : 10.1007/s100520050600

Neutral Higgs bosons were searched for in the data collected by DELPHI at a centre-of-mass energy of 183 GeV, corresponding to an integrated luminosity of 54 pb TeX . The production of the lightest neutral Higgs boson with either an on-shell Z boson or a neutral pseudo-scalar Higgs boson was analysed. Lower limits at the 95% confidence level were obtained on the Higgs boson masses. The limits are 85.7 GeV/ TeX for the Standard Model Higgs boson and 74.4 GeV/ TeX for the scalar and 75.3 GeV/ TeX for the pseudo-scalar Higgs bosons as predicted by the minimal super-symmetric extension of the Standard Model with commonly used assumptions on the model parameters, plus the assumption that the mass of the pseudo-scalar boson is greater than 20 GeV/ TeX . These results significantly improve the limits reached with previous data.

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