Released by Raul Costa, Margarete Mühlleitner, Marco Sampaio
and Rui Santos
A Fortran program for the calculation of the decay widths and branching
ratios of the Higgs bosons in the real and the complex singlet extensions
of the Standard Model, both in the broken and the dark matter phase of the
The Fortran program sHDECAY calculates the decays of
the Higgs bosons in the real and the complex singlet extensions of the
Standard Model, both in the broken and the dark matter phase. It includes
the most important
higher-order QCD effects and consistently neglects all EW corrections.
They are not available for the singlet case and contrary to the QCD
corrections, cannot be taken over from the SM case.
A detailed description of each model can be found in
R. Costa, M. Mühlleitner,
Sampaio, R. Santos, JHEP 06 (2016) 034, arXiv 1506.05355 .
sHDECAY consists of the main program file
shdecay.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
shdecay.in. It is the original hdecay.in
input file supplemented by additional input values for the
choice of the singlet model and the setting of the various
related mass values and parameters. The meaning of these
input values is explained in the header of the file shdecay.f. The output files which are
generated are br.rbxy (real broken
phase), br.rdxy (real dark phase), br.cbxy (complex broken phase) and br.cdxy (complex dark phase). Depending on the
model, x=1 or runs from 1 to 2 or from 1 to 3. The files with y=1 include
fermionic decays, with y=2 the bosonic decays and the total width and with
y=3 the Higgs-to-Higgs decays.
Note that the Standard Model decay widths and branching ratios are
obtained by setting COUPVAR=0 and ISINGLET=0 in the input file. Be aware
that, unless OMIT ELW is set to 1,
they do not correspond to the singlet case results, even if in the singlet
case the couplings are taken to be the ones of the SM. The reason is that
the EW corrections are consistently turned off in the singlet case.
Last modified: Wed Dec 16 09:44:52 CET 2015