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21 lines
1.1 KiB
21 lines
1.1 KiB
\midheading{$e^- e^+ \nu_e \bar \nu_e$ production, processes 1281, 1311, 1321}
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These processes compute cross sections relevant for the final state
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$e^- e^+ \nu_e \bar \nu_e$, i.e. with charged leptons and neutrinos
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from the same (electron) doublet. As a result they receive
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contributions from diagrams with resonant $ZZ$ propagators and
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resonant $WW$ propagators. Process {\tt 1281} only includes
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amplitudes containing a Higgs boson (c.f. processes {\tt 123} and {\tt 128}).
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Process {\tt 1321} only includes continuum (box-diagram)
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amplitudes (c.f. processes {\tt 127} and {\tt 132}). Process {\tt 1311}
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includes both amplitudes and the effects of the interference
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between them (c.f. processes {\tt 126} and {\tt 131}).
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% The effect of
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% the interference between the $WW$ and $ZZ$ diagrams can be assessed
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% by, for instance, comparing process {\tt 1281} with the sum of
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% processes {\tt 123} and one-third of {\tt 128.ELNU}, where the
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% weighting is to divide out the natural sum over three neutrin\ o
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% flavours in process {\tt 128.ELNU}.
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%
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% Event generation is not available for these processes at present.
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