A flavour-independent search for a hadronically decaying neutral Higgs bosons at LEP with the L3 detector

Distributions for the q qγ γ ¯ final state of (a) the energy of the most energetic photon normalised to the beam energy and (b) the recoil mass against the di-photon system in

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The distribution of the energy of the second most energetic photon normalised to the beam energy is presented in Figure 6a for the preselected events.. Figure 6b shows the recoil

A search for pair-produced charged Higgs bosons is performed with the L3 detec- tor at LEP using data collected at centre-of-mass energies between 189 and 209 GeV, corresponding to

These follow from uncertainties in the determination of the energy scale of the detector, on the event selection and lepton identification criteria, on Monte Carlo statistics and on

After applying cuts on the neural networks, the analyses produce final distributions of the selected signal, background, and data, generally using a discriminant combination of

The signature of an invisible Higgs boson decay is a pair of acoplanar and acollinear jets with a di-jet mass compatible with the Z mass and missing energy and momentum due to

To reduce this background further a likelihood function was defined with eleven variables: the event thrust, the cosine of the missing momentum, the angle in the transverse