Springer LINK: The European Physical Journal C - Abstract Volume 5 Issue 1 (1998) pp 19-40

The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

Table of Contents

Abstract Volume 5 Issue 1 (1998) pp 19-40
DOI 10.1007/s100529800931

experimental physics:
A search for neutral Higgs bosons in the MSSM and models with two scalar field doublets

OPAL Collaboration , K. Ackerstaff et al. (8)

(8) CERN, European Organisation for Particle Physics, CH-1211 Geneva 23, Switzerland

Received: 20 February 1998 / Published online: 13 July 1998

Abstract. A search is described for the neutral Higgs bosons ${\rm h}^0$ and ${\rm A}^0$ predicted by models with two scalar field doublets and, in particular, the Minimal Supersymmetric Standard Model (MSSM). The search in the ${\rm Z^0 h^0}$ and ${\rm h^0A^0}$ production channels is based on data corresponding to an integrated luminosity of 25 pb$^{-1}$ from ${\rm e^+e^-}$ collisions at centre-of-mass energies between 130 and 172 GeV collected with the OPAL detector at LEP. The observation of a number of candidates consistent with Standard Model background expectations is used in combination with earlier results from data collected at the ${\rm Z}^0$ resonance to set limits on $m_{\rm h}$ and $m_{\rm A}$ in general models with two scalar field doublets and in the MSSM. For example, in the MSSM, for $\tan \beta b>1$, minimal and maximal scalar top quark mixing and soft SUSY-breaking masses of 1 TeV, the 95% confidence level limits $m_{\rm h}>59.0$ GeV and $m_{\rm A}>59.5$ GeV are obtained. For the first time, the MSSM parameter space is explored in a detailed scan.

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The European Physical Journal C

experimental physics: A search for neutral Higgs bosons in the MSSM and models with two scalar field doublets

experimental physics:
A search for neutral Higgs bosons in the MSSM and models with two scalar field doublets