GiBUU based neutrino interaction simulations in KM3NeT

TL;DR

This paper discusses the use of the GiBUU neutrino generator for simulating neutrino interactions in KM3NeT, highlighting its approach to modeling final state interactions and comparing results with the GENIE-based simulation environment.

Contribution

It introduces the application of the GiBUU generator in KM3NeT and compares its results to the traditional GENIE-based simulation, emphasizing differences in modeling neutrino interactions.

Findings

GiBUU provides detailed simulation of final state interactions.

Comparison shows differences between GiBUU and GENIE results.

Detector-specific visible energy results are presented.

Abstract

The simulation of the neutrino interaction is a crucial step in the simulation chain of a neutrino experiment. The different processes taking part in the neutrino scattering on a nucleus require several approximations in order to make the simulation possible and to realize reasonable computation times. This can be realised in different ways, e.g. by parametrised models for the different scattering processes and energy regimes as it is implemented in GENIE. The GiBUU neutrino generator utilises the Boltzmann-Uehling-Uhlenbeck equation to simulate the particle flow after the neutrino interactions, the so-called final state interactions. The detector-specific results in form of the visible energy in the detector after the light propagation simulation and the KM3NeT event reconstruction are presented. In addition to that, the comparison to the GENIE based simulation environment in KM3NeT (gSeaGen) is drawn.