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18 lines
987 B
18 lines
987 B
\midheading{$Zt$ and $Z\bar{t}$ production, processes 560--569}\
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\label{subsec:Zt}
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These processes describe the production of a single top quark (or antiquark) by $W$ exchange in the
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$t$-channel, in association with a $Z$ boson. Processes {\tt 560}, {\tt 561},
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{\tt 564}, {\tt 567} can be performed at NLO.
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Processes {\tt 560}-{\tt 563} are for stable top quarks, whereas processes {\tt 564}-{\tt 569}
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include the decay of the top quark and antiquark
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in the approximation inwhich the top quark is taken to
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be on shell allowing a clean separation
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between production and decay.
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For more details on this calculation, please see Ref.~\cite{Campbell:2013yla}.
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For processes {\tt 564} and {\tt 567} the default behaviour is that the hadronic decay products
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are clustered into jets using the supplied jet
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algorithm parameters, but no cut is applied on the number of jets.
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This behaviour can be altered by changing the value of the
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variable {\tt notag} in the file {\tt src/User/setnotag.f}.
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