Search for neutral Higgs bosons decaying into four taus at LEP2

Schael, S. and Finch, Alexander (2010) Search for neutral Higgs bosons decaying into four taus at LEP2. Journal of High Energy Physics, 2010 (5): 49. ISSN 1029-8479

Abstract

A search for the production and non-standard decay of a Higgs boson, h, into four taus through intermediate pseudoscalars, a, is conducted on 683 pb−1 of data collected by the ALEPH experiment at centre-of-mass energies from 183 to 209 GeV. No excess of events above background is observed, and exclusion limits are placed on the combined production cross section times branching ratio, ξ2=σ(e+e−→Zh)σSM(e+e−→Zh)×B(h→aa)×B(a→τ+τ−)2 . For m h < 107 GeV/c 2 and 4 < m a < 10 GeV/c 2, ξ 2 > 1 is excluded at the 95% confidence level.