Jülich-Bonn-Washington model for pion electroproduction multipoles

2021/04/15 by Maxim Mai, M. Döring, Michael Döring +11
Physics and Astronomy · #Amplitude #High-Energy Particle Collisions Research #Nuclear physics #Parametrization (atmospheric modeling) #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Proton #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Radiative transfer #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.103.065204

published as Phys. Rev. C 103, 065204 (2021) · 27 pages, 14 figures

arxiv created 2021/04/15 · openalex publication_date 2021/06/25 · arxiv updated 2021/06/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

Pion electroproduction off the proton is analyzed in a new framework based on a general parametrization of transition amplitudes, including constraints from gauge invariance and threshold behavior. Data with energies 1.13\phantom\rule4pt0exGeV<W<1.6 GeV and Q² below 6\phantom\rule4pt0exGeV² are included. The model is an extension of the latest J"ulich-Bonn solution incorporating constraints from pion-induced and photoproduction data. Performing large-scale fits (\ensuremath≈10⁵ data) we find a set of solutions with \ensuremathχ_dof²=1.69--1.81 which allows us to assess the systematic uncertainty of the approach.

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