h1jet is hosted by Hepforge, IPPP Durham


H1jet is a fast code that computes the total cross section and differential distribution in the transverse momentum of a colour singlet.

In its current version, H1jet implements only leading-order 2 → 1 and 2 → 2 processes, but could be extended to higher orders. H1jet is mainly designed for theorists and can be fruitfully used to assess deviations of selected new physics models from the Standard Model behaviour, as well as to quickly obtain distributions of relevance for Standard Model phenomenology. H1jet is written in Fortran 95 and Python 3, and takes about 1 second to run with default parameters.

Developed by Alexander Lind and Andrea Banfi.
Presented in arXiv:2011.04694, published in Eur. Phys. J. C 81, 72 (2021).


A tarball with the latest version is available here: H1jet-1.0.0.tar.gz

You can also obtain the latest version directly from the GitHub repository:

git clone https://github.com/alexander-lind/H1jet.git

Alternatively, you can try out H1jet in your browser before downloading it! Try out H1jet online.

H1jet is distributed under the GNU General Public License v3.0 (GPLv3) with the additional request that you cite the following publication if you use it:

A. Lind & A. Banfi, Eur. Phys. J. C 81, 72 (2021) (arXiv:2011.04694).


H1jet requires the following external packages:
  • HOPPET, for QCD DGLAP evolution of PDFs, available here.
  • LHAPDF, for PDF sets, available here.
  • CHAPLIN, for complex harmonic polylogarithms, available here.

Getting Started

To quickly get up and running with H1jet see the Getting Started section.
For more details see the Manual (PDF).
Or jump directly into playing around with H1jet online.

Last updated 25 January, 2022.