Neutral Higgs bosons of the Standard Model and of the MSSM are searched for in the data collected at a centre-of-mass energy of 188.6GeV by the ALEPH experiment at LEP, with an integrated luminosity of 176 pb(-1). No evidence for a signal is found. A lower limit of 92.9GeV/c(2) at 95% confidence level is set on the mass of the Standard Model Higgs boson, with an expected sensitivity of 95.9 GeV/c(2). In the MSSM, for tan beta greater than or equal to 0.7 and for benchmark parameter choices, observed (expected) lower limits of 82.5 (83.1) GeV/c(2) and 82.6 (83.2) GeV/c(2) are derived for the masses of the neutral Higgs bosons h and A, respectively. An update of the general MSSM parameter scan is also presented.
|Autori interni:||IASELLI, Giuseppe|
CREANZA, Donato Maria
MAGGI, Giorgio Pietro
|Titolo:||Search for the neutral Higgs bosons of the Standard Model and the MSSM in e(+)e(-) collisions at root s=189 GeV|
|Rivista:||THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS|
|Data di pubblicazione:||2000|
|Appare nelle tipologie:||1.1 Articolo in rivista|