561 f(-p1) + f(-p2) Z(e-(p3) + e+(p4)) + t(p5) + q(p6)

561.1 Zt and Zt production, processes 560–569


[For more details on this calculation, please see Ref. [1]]

These processes describe the production of a single top quark (or antiquark) by W exchange in the t-channel, in association with a Z boson. Processes 560, 561, 564, 567 can be performed at NLO. Processes 560-563 are for stable top quarks, whereas processes 564-569 include the decay of the top quark and antiquark in the approximation inwhich the top quark is taken to be on shell allowing a clean separation between production and decay.

For processes 564 and 567 the default behaviour is that the hadronic decay products are clustered into jets using the supplied jet algorithm parameters, but no cut is applied on the number of jets. This behaviour can be altered by changing the value of the variable notag in the file src/User/setnotag.f.

561.2 Plotter

nplotter_Ztj.f is the default plotting routine.

561.3 Example input and output file(s)

input561.ini process561.out


[1]    J. Campbell, R.K. Ellis and R. Rontsch, Single top production in association with a Z boson at the LHC, Phys. Rev. D 87 (2013) 114006 [1302.3856].