Inclusive Higgs cross sections. Download
iHixs is a C++ code for computing inclusive Higgs boson production cross sections in gluon fusion.
If you use this code in your publication, please cite arXiv:1802.00827.
- LHAPDF version 6.*
- Boost 1.6 or higher (headers only)
- Cuba 4.2 : a multidimensional numerical integration library
iHixs has been succesfully built with gcc 4.8 and higher, on Linux and Mac OS X systems. With respect to C++ standards, C++11 compliance is required.
note: LHAPDF and Cuba should have been installed on the system with the same compiler as used for ihixs. This is a common source of linking problems on Mac OS, where the native compiler is CLANG LLVM.
You can obtain iHixs from the releases on the github repository,
https://github.com/dulatf/ihixs/releases
or by cloning the repository directly:
git clone https://github.com/dulatf/ihixs.git
Clone the repository or download the release tarball and unzip. Then change create a build subdirectory in the resulting ihixs source directory and run cmake.
cd <ihixs_src_dir>
mkdir build
cd build
cmake ..
make
If the dependencies cannot be found automatically run cmake instead as follows
cmake -DLHAPDF_DIR=<lhapdf_main_dir> -DCUBA_DIR_USER=<cuba_dir> -DBOOST_DIR_USER=<boost_dir> ..
If you need to determine a specific set of compilers
CXX=mygcc CC=mygcc cmake -DLHAPDF_DIR=<lhapdf_main_dir> -DCUBA_DIR_USER=<cuba_dir> -DBOOST_DIR_USER=<boost_dir> ..
The input is controlled by a runcard. An example runcard is available at default.card
./ihixs -i myruncard
Available options that can be specified in the runcard can be seen by
./ihixs --help
Options can also be set through command line, the gnu way, e.g.
./ihixs -i myruncard --mur=63.5
Some of the options have shorthands. For example
--input_filename myruncard
is equivalent to
-i myruncard
To see for which options have available shorthands, type
./ihixs --help
and check whether an option has a shorthand after its name, for example
output_filename [o]
means that the option output_filename has the shorthand 'o'
- How to run tests : there are several tests integrated in the distribution, within the google test framework (https://github.com/google/googletest). You can run them by typing (from the build)
where is any of the binaries in the src/test/ directory. For example
src/tests/<name of test>
runs several tests related to the higgs eft amplitudes.src/tests/ihixs_eft
- Achilleas Lazopoulos
- Bernhard Mistlberger
- Falko Dulat
Made with ๐ in Geneva, Menlo Park and Zurich.