Single and multi-photon events with missing energy in e$^+$e$^-$ collisions at $\sqrt{s}$ = 189 GeV with the L3 detector at LEP

Table 5: Observed and expected numbers of collinear photon events and measured e + e − → γγ cross section for the different centre-of-mass energies. The uncertainties quoted on

Residual cosmic ray and detector noise backgrounds are measured by selecting events slightly out of time with respect to the beam crossing but which pass all other cuts. No such

Assuming a common scalar mass at the GUT scale, the relation between the masses of the right- and left-handed sleptons can be used to combine results of the searches for

The FSI error is taken from the Bose-Einstein and colour reconnection systematic uncertainties in quadrature. The quoted systematic error includes the LEP energy.. The distribution

At each centre-of-mass energy the number of expected background events ( N bkg ), of observed candidates ( N obs ), the signal efficiency ε computed with respect to all W decays,

In the MSSM, with Grand Unification assumptions [23], the masses and couplings of the SUSY particles as well as their production cross sections, are entirely described [2] once

In the MSSM, with Grand Unification assumptions [21], the masses and couplings of the SUSY particles as well as their production cross sections, are entirely described [2] once

The number of signal events expected at the three center-of-mass energies, calculated assuming the Zh production cross- section to be the same as for the Standard Model Higgs boson