550 f(-p1) + f(-p2) H(ga(p3) + ga(p4)) + t(p5) + q(p6)

550.1 Ht and Ht production, processes 540–557

These processes describe the production of a single top quark (540, 544, 550, 554) or antiquark (541, 547, 551, 557) by W exchange in the t-channel, in association with a Higgs boson. These processes can be performed at NLO. For processes 540, 541, 550, 551, the top quark does not decay, but the Higgs boson decays to bb, (540, 541), or to γγ, (550, 551). Processes 544, 547 and 554, 557 include the decay of the top quark and antiquark in the approximation in which the top quark is taken to be on shell allowing a clean separation between production and decay. For more details on this calculation, please see Ref. [1].

It is possible to study the effects of anomalous couplings of the Higgs boson to the top quark and W bosons. These are parametrized by cttH = gttH∕gttHSM and cWWH = gWWH∕gWWHSM respectively, so that cttH = cWWH = 1 in the SM. Different couplings may be chosen by modifying the variables cttH and cWWH in the anom_higgs section of the input file.

550.2 Plotter

nplotter_Ztj.f is the default plotting routine.

550.3 Example input and output file(s)

input550.ini process550.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].