Top Processes
Different ways to produce top quarks, singly or in pairs.
flag Top:all
(default = off)
Common switch for the group of top production.
flag Top:gg2ttbar
(default = off)
Scatterings g g → t tbar.
Code 601.
flag Top:qqbar2ttbar
(default = off)
Scatterings q qbar → t tbar by gluon exchange.
Code 602.
flag Top:qq2tq(t:W)
(default = off)
Scatterings q q' → t q'' by t-channel exchange
of a W^+- boson.
Code 603.
flag Top:ffbar2ttbar(s:gmZ)
(default = off)
Scatterings f fbar → t tbar by s-channel exchange
of a gamma^*/Z^0 boson.
Code 604.
flag Top:ffbar2tqbar(s:W)
(default = off)
Scatterings f fbar' → t q'' by s-channel exchange
of a W^+- boson.
Code 605.
flag Top:gmgm2ttbar
(default = off)
Scatterings gamma gamma → t tbar.
Code 606.
flag Top:ggm2ttbar
(default = off)
Scatterings g gamma → t tbar.
Code 607 when g gamma → t tbar and 617
when gamma g → t tbar.
By default top always decays to a W and a down-type quark.
It is possible to switch on the t → H+ b decay mode.
Note that its partial width is calculated using the tan(beta)
value stored in HiggsHchg:tanBeta, so that it can be used
without having to read in a SUSY parameter file. For the H+ to
decay also Higgs:useBSM = on is necessary.