[Comphep-common] 2HDM process production

[Ijaz Ahmed]

Hi comphep experts:

 I am studying pp-->A-->ZH0 process in the 2HDM implemented by my own in comphep using MSSM model, as i could not find by default 2HDM in comphep, if there is let me inform.
My question is that at LHC the dominant production cross-section fo this channel is through gluon-gluon fusion, while here in comphep using colliding beams of pb-pb, which contains virtual bottom quarks and gluons in =side proton beams, but among the fynman diagrams i could not find such diagram which produce this process by gluon fusion, please anybody can help me.

Without including gluon fusion in comphep the total cross-section obtained at LHC 14Tev for C scenario, for this channel is extremely small, while it is around few tens of femto barn generated by SuSHi. I could not understand this problem also. I want to know contribution of bb and gg in the total production cross-section excluding other diagram. Anyone can enlighten me.

Usually my sample generation process in few hundred thousands is very time consuming during running on standalone comphep at local PC, any method to run much faster way?

Cross-section obtained by adopting procedure ; producing process.dat and then ./symb calculation then numerical calculation ,  and obtained by graphical interface must be same??
cheers
Ijaz

thanks