DELPHI LEP160 EVENTS, FOUR FERMION
DELPHI Events from the 161 GeV Run
Four-fermion and Two-photon events
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e+ e- --> e+ e- q qbar
e+ e- --> mu+ mu- q qbar
e+ e- --> q qbar
- r068301e001680, unbalanced q qbar
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Unbalanced q-qbar event which was selected as candidate for neutralino and
for chargino.
The two-jet invariant mass, corrected for particle losses,
is (72+-11) GeV/c**2 and the recoil mass (59+-26) GeV/c**2.
The most likely interpretation of this event is a t-channel (W e nu),
where the electron is lost, which has 30% probability.
The probability to be a (q qbar nu nu) events is of 5%.
The event shows a clear 2-jet topology. This, in fact, excludes the
interpretation as chargino. It was kept as candidate because the explicit
4-jet requirement was not part of the selection criteria.