H1jet, a fast program to compute transverse momentum distributions

TL;DR

H1jet is a fast computational tool designed for theorists to efficiently calculate transverse momentum distributions and cross sections of color singlet processes, aiding in new physics searches and Standard Model analyses.

Contribution

The paper introduces H1jet, a new fast code for computing transverse momentum distributions, with detailed instructions for extending its capabilities beyond leading order.

Findings

H1jet provides rapid calculations of cross sections and distributions.

It is useful for testing new physics models against Standard Model predictions.

The code can be extended to higher-order processes.

Abstract

We present H1jet, a fast code that computes the total cross section and differential distribution in the transverse momentum of a colour singlet. In its current version, the program implements only leading-order $2\to 1$ and $2\to 2$ processes, but could be extended to higher orders. We discuss the processes implemented in H1jet, give detailed instructions on how to implement new processes, and perform comparisons to existing codes. This tool, mainly designed for theorists, 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.