CN2HDM_HDECAY
Released by Margarete Mühlleitner, Jonas Müller,
Jonas Wittbrodt, Sophie L. Williamson
A Fortran program for the calculation of the decay widths and branching
ratios of the Higgs bosons in the CN2HDM, i.e. the CP-violating 2HDM
extended by a complex singlet field.
Description:
The Fortran program CN2HDM_HDECAY calculates the decays of
the Higgs bosons in the CN2HDM. The CN2HDM potential is CP-violating and
has two Z_2 symmetries one of which is softly broken while the other
remains unbroken. The real part of the neutral scalar fields of both the
two
doublet and the singlet fields are allowed to acquire vacuum expectation
values (VEVs), and the then remaining symmetry stabilizes the complex
component field of the singlet that becomes the Dark Matter (DM)
candidate. The model thus features not only CP violation required for successful baryogenesis
but also a DM candidate. The Higgs sector consists of four CP-mixing
visible neutral Higgs bosons,
a DM candidate and a pair of oppositely charged Higgs bosons.
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 CN2HDM and contrary to the QCD
corrections, cannot be taken over from the SM.
A detailed description of the model and the program can be found in
M. Mühlleitner,
J. Müller, J. Wittbrodt, S.L. Willliamson, arXiv:yymm.wxyz. .
Files:
CN2HDECAY consists of the main program file
cn2hdm_hdecay.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
cn2hdm_hdecay.in. It is the original
hdecay.in
input file supplemented by additional input values.
When setting in cn2hdm_hdecay.in 2HDM=1 and CN2HDM=1 then the CN2HDM
decay widths and branching ratios are calculated. The meaning
of the remaining
input values is explained in the header of the file cn2hdm_hdecay.f. The output files that
are
generated are called br.hxy_CN2HDM
for the CP-mixing visible neutral Higgs bosons and br.cz_CN2HDM
for the charged Higgs bosons.
Here x=1,2,3,4 denotes the Higgs boson, i.e. H1, H2, H3, H4, and the
files
with y=1 include the fermionic decays, with y=2 the decays into gauge
bosons and with
y=3,4,5 the Higgs-to-Higgs decays, the Higgs-to-gauge-Higgs decays and
the total width. For the charged Higgs bosons, the files with z=1,2
include the fermionic decays, and the file with z=3 the decays into a
charged W boson plus Higgs boson pair. Note that the Standard Model decay
widths and branching ratios are
obtained by setting COUPVAR=0, 2HDM=0 and CN2HDM=0 in the input file.