KaTie: for parton-level event generation with k_T-dependent initial states

TL;DR

KaTie is a versatile parton-level event generator that incorporates transverse momentum dependence in initial states, enabling detailed simulations of hadron scattering processes with off-shell matrix elements.

Contribution

It introduces a new event generator capable of handling k_T-dependent initial states and off-shell matrix elements for complex Standard Model processes.

Findings

Handles arbitrary processes with up to four final-state particles

Supports single and multi-parton scattering events

Provides weighted events in Les Houches format

Abstract

KaTie is a parton-level event generator for hadron scattering processes that can deal with partonic initial-state momenta with an explicit transverse momentum dependence causing them to be space-like. Provided with the necessary transverse momentum dependent parton density functions, it calculates the off-shell matrix elements and performs the phase space importance sampling to produce weighted events, for example in the Les Houches Event File format. It can deal with arbitrary processes within the Standard Model, for up to four final-state particles and beyond. Furthermore, it can produce events for single-parton scattering as well as for multi-parton scattering.