Antenna Showers with Hadronic Initial States

TL;DR

This paper introduces a new antenna shower formalism for hadronic initial states, enabling more accurate simulations of particle collisions involving protons and other hadrons.

Contribution

It develops a complete initial-state antenna shower formalism with phase-space maps and antenna functions, including uncertainty estimation, for use in high-energy physics simulations.

Findings

Preliminary implementation in Vincia framework

Effective modeling of initial-initial and initial-final configurations

Enhanced uncertainty estimation capabilities

Abstract

We present an antenna shower formalism including contributions from initial-state partons and corresponding backwards evolution. We give a set of phase-space maps and antenna functions for massless partons which define a complete shower formalism suitable for computing observables with hadronic initial states. We focus on the initial-state components: initial-initial and initial-final antenna configurations. The formalism includes comprehensive possibilities for uncertainty estimates. We report on some preliminary results obtained with an implementation in the Vincia antenna-shower framework.