MARTINI: An event generator for relativistic heavy-ion collisions

TL;DR

MARTINI is a comprehensive event generator designed for simulating high-energy nucleus-nucleus collisions, integrating soft background evolution, parton dynamics, and medium effects to produce detailed event configurations.

Contribution

It introduces a modular framework combining multiple models for a complete simulation of relativistic heavy-ion collisions, including thermal effects and medium modifications.

Findings

Accurately reproduces neutral pion nuclear modification factors at RHIC.

Incorporates photon production channels for high p_T photons.

Provides detailed event configurations accounting for medium effects.

Abstract

We introduce the Modular Algorithm for Relativistic Treatment of heavy IoN Interactions (MARTINI), a comprehensive event generator for the hard and penetrating probes in high energy nucleus-nucleus collisions. Its main components are a time evolution model for the soft background, PYTHIA 8.1 and the McGill-AMY parton evolution scheme including radiative as well as elastic processes. This allows us to generate full event configurations in the high p_T region that take into account thermal QCD and QED effects as well as effects of the evolving medium. We present results for the neutral pion nuclear modification factor in Au+Au collisions at RHIC as a function of p_T for different centralities, and also as a function of the angle with respect to the reaction plane for non-central collisions. Furthermore, we study the production of high transverse momentum photons incorporating a complete set of photon-production channels.