Comparison of Models of Neutrino-Nucleus Interactions

Abstract

Abstract. One session at the NUINT09 conference was devoted to talks at the interface of theory and experiment. A highlight of that session was a presentation comparing results of many theorists and modelers. This note briefly describes the models and compares calculations of important neutrino-nucleus cross sections.

Inclusive charged-current neutrino-nucleus reactions

“…19 The different couplings for N and ∆ are incorporated in U N and U ∆ and then the same interaction strengths V l and Vt are used for ph and ∆h excitations [38]. 20 The parameterizations are given as a function of the kinetic energy in the laboratory system of a pion that would excite a ∆ with the corresponding invariant mass and are valid in the range 85 MeV < Tπ < 315 MeV. Below 85 MeV the contributions from C Q and C A 3 are rather small and are taken from Ref.…”

A Search for Neutrino Induced Coherent NC($\pi^{0}$) Production in the MINOS Near Detector

“…Figure 1.4: Differential cross sections as a function of the pion final state kinetic energy (T π ) on carbon, for various neutrino coherent scattering models. At the neutrino energies plotted, the predicted cross sections for the models vary significantly in both shape and rate [10].…”

Neutrino-nucleus interaction models and their impact on oscillation analyses

“…The residual nucleus system remains in its ground state in the coherent production while in the incoherent pion production this is not the case. GENIE includes only the coherent (exclusive) pion production [61], whereas GiBUU considers only the incoherent pion production process. A full theoretical calculation for this interaction mode can be found in Ref.…”

“…[62,63]. GENIE uses PCAC [61] with the ReinSehgal [64] model to simulate the single pion interaction with the nucleon inside the ground-state target nucleus. The neutrinonucleon cross-section is computed at the initial time (t=0) with the elastic nuclear form factors and an absorption factor to simulate the FSI of the outgoing pion.…”