Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 7: Structure and Dynamics of Nuclei I

HK 7.2: Vortrag

Montag, 28. März 2022, 14:15–14:30, HK-H6

Neutrino-induced pion-production off the nucleon in chiral effective field theory — •Niklas Döpper and Norbert Kaiser — Physik-Department T39, Technische Universität München, D-85747 Garching, Germany

The current status of the analysis of neutrino-induced single pion production off the nucleon in the framework of manifestly Lorentz-invariant chiral perturbation theory is presented. The calculation of tree and one-loop diagrams is performed up to and including fourth chiral order with an explicit treatment of the Δ(1232) resonance. Terms that break the power counting between the loop and small momentum expansion are treated in the extended on-mass-shell scheme. This calculation aims to predict the total cross sections for the reactions of neutrino or antineutrino induced pion production off neutrons and protons at low energies. The present result has implications for the nuclear two-body axial exchange current as generated by one-pion exchange.

This work has been supported in part by DFG (Project-ID 196253076 - TRR 110) and NSFC.