Coupled-channels analysis of pion and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>η</mml:mi></mml:math> electroproduction within the Jülich-Bonn-Washington model
Maxim Mai, M. Döring, C. Granados, H. Haberzettl, Jackson Hergenrather, Ulf-G. Meißner, D. Rönchen, I. I. Strakovsky, R. L. Workman
Abstract
Pion and $\ensuremath{\eta}$ electroproduction data are jointly analyzed for the first time, up to a center-of-mass energy of 1.6 GeV. The framework is a dynamical coupled-channels model, based on the recent J\"ulich-Bonn-Washington analysis of pion electroproduction data for the same energy range. Comparisons are made to a number of single-channel $\ensuremath{\eta}$ electroproduction fits. By comparing multipoles of comparable fit quality, we find some of these amplitudes are well determined over the near-threshold region, while others will require fits over an extended energy range.
Topics & Concepts
PionPhysicsParticle physicsRange (aeronautics)Energy (signal processing)AmplitudeChannel (broadcasting)Nuclear physicsComputer scienceQuantum mechanicsMaterials scienceComputer networkComposite materialParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research