mcggh

A parton-level Monte Carlo generator for Higgs production through gluon fusion process at hadron colliders.

Requirements

• C++ compiler supporting C++14 features (Clang > 3.4, GCC > 4.9),

• LHAPDF 6 and the NNPDF23_lo_as_0130_qed PDF data. The latter can be installed by

lhapdf install NNPDF23_lo_as_0130_qed

• LoopTools. Check that f++ is in $PATH and edit the LT variable in Makefile. If you are in ArchLinux, you can install it via AUR. For other Linux distribution, see the build function in looptools.

Usage and example outputs

• ./bin/ggh1 13000 125

* p p --> g g --> h (ECM = 13 TeV, MH = 125 GeV)
-- Integrating for cross section ...
-- Done integrating.
-- Total cross section = 13.9594 +- 0.852319 pb

• ./bin/ggh2

Usage: ggh2 <ECM in GeV> <MH in GeV> [nevent] [output]

• ./bin/ggh2 13000 125 3

* p p --> g g --> h h (ECM = 13 TeV, MH = 125 GeV)
-- Integrating for cross section ...
 ====================================================
   FF 2.0, a package to evaluate one-loop integrals
 written by G. J. van Oldenborgh, NIKHEF-H, Amsterdam
 ====================================================
 for the algorithms used see preprint NIKHEF-H 89/17,
 'New Algorithms for One-loop Integrals', by G.J. van
 Oldenborgh and J.A.M. Vermaseren, published in
 Zeitschrift fuer Physik C46(1990)425.
 ====================================================
-- Done integrating.
-- Total cross section = 12.7802 +- 0.0583498 fb
-- Generating events ...
   761.046      137.379      4.135
   417.408      157.795      3.188
   368.378       85.528      3.397
-- Done.

References

• arXiv:hep-ph/9504378 (pp --> h),
• arXiv:hep-ph/0503172 (pp --> h),
• arXiv:hep-ph/9603205 (pp --> hh),
• arXiv:1405.7040 (pp --> hh).

Plot

There are example codes for making some histograms using generated event data in the plot directory. ROOT is required to build them.