4) W-pairs: Pa 5; Pl 6a

Title: Preliminary Results on the Measurement of W-Pair Cross Sections in
e+e- Interactions at sqrt(s)=192-202 GeV and W-Decay Branching
Fractions.

We report on the measurement of W-boson pair-production with the L3
detector at LEP.  In a data sample corresponding to a total luminosity
of 233 pb-1 collected at centre-of-mass energies of 192, 196, 200 and
202 GeV, we select 3529 four-fermion events with pairs of hadronic
jets or pairs of leptons with high invariant masses.  Branching
fractions of W decays into different fermion-antifermion pairs are
determined.  Assuming charged-current lepton universality, the
branching fraction for hadronic W decays is measured including data
collected at lower centre-of-mass energies.  Combining all final
states the total cross section for W-pair production is measured at
the four centre-of-mass energies. These results are preliminary.


Parallel session: 5
Plenary Talks   : 6a