2021 Impact factor 4.991
Particles and Fields
Eur. Phys. J. C 17, 223-240
DOI 10.1007/s100520000473

Search for the neutral Higgs bosons of the Standard Model
and the MSSM in e+e- collisions at $\sqrt{s}= 189$GeV

The ALEPH Collaboration

R. Barate - et al.

Laboratoire de Physique des Particules (LAPP), IN2P3-CNRS, 74019 Annecy-le-Vieux Cedex, France

Received: 31 January 2000 / Published online: 8 September 2000 - © Springer-Verlag 2000

Abstract
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 ${{\rm pb}^{-1}}$. No evidence for a signal is found. A lower limit of 92.9 GeV/c2 at 95% confidence level is set on the mass of the Standard Model Higgs boson, with an expected sensitivity of 95.9 GeV/c2. In the MSSM, for $\tan\beta \ge 0.7$ and for benchmark parameter choices, observed (expected) lower limits of 82.5 (83.1) GeV/c2 and 82.6 (83.2) GeV/c2 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.


Copyright Società Italiana di Fisica, Springer-Verlag 2000