Released by Margarete Mühlleitner, Marco Sampaio, Rui
Santos and Jonas Wittbrodt
A Fortran program for the calculation of the decay widths and branching
ratios of the Higgs bosons in the N2HDM, i.e. the CP-conserving 2HDM
extended by a real scalar singlet field.
The Fortran program N2HDECAY calculates the decays of
the Higgs bosons in the N2HDM. The N2HDM features 3 neutral CP-even
Higgs bosons H1, H2 and H3, one CP-odd boson A and two charged Higgs
bosons H+/-. The program includes in the decay widths the most important higher order QCD effects and consistently neglects all EW
corrections. They are not available for the N2HDM and contrary to the QCD
corrections, cannot be taken over from the SM case.
A detailed description of the model and the program can be found in
M. Sampaio, R. Santos, J. Wittbrodt, JHEP 1703 (2017) 094 .
N2HDECAY consists of the main program file
n2hdecay.f. Further linked routines are
dmb.f, elw.f, feynhiggs.f, haber.f, hgaga.f,
hgg.f, hsqsq.f, susylha.f.
The input file is named
n2hdecay.in. It is the original hdecay.in
input file supplemented by additional input values for the
choice of the N2HDM, the type of Yukawa couplings and the setting
of the mass values and parameters. The N2HDM decay widths
are calculated by setting in n2hdecay.in 2HDM=1 and N2HDM=1. The meaning
of the remaining
input values is explained in the header of the file n2hdecay.f. The output files which are
generated are br.x_N2HDM_y
Here x denotes the Higgs boson, i.e. x=H1, H2, H3, A, H+. The files
with y=a include the fermionic decays, with y=b the bosonic decays and with
y=c,d the Higgs-to-Higgs decays, the Higgs-to-gauge-Higgs decays and
the total width. Note that the Standard Model decay widths and branching
obtained by setting COUPVAR=0, 2HDM=0 and N2HDM=0 in the input file.