Speakers
Description
The focus of the session will be on the spectrum and structure of nucleon resonances (N), as revealed through N electroexcitation amplitudes. Such fundamental information on the mechanisms of strong-coupling QCD is crucial to validating any proposed solution to the theory and explaining the emergence of mass. Precise data from both electron and pion beams are necessary for developing robust approaches for amplitude analyses, capable of delivering sound results for N quantum numbers and excitation amplitudes over a broad range of q2 to be interpreted starting from the QCD Lagrangian. Our workshop will foster the synergies necessary to move this effort forward in a timely way. (Context for this proposal is provided in Exploring the production of Ns with pion and electron beams [1], published December 2022 in the quarterly online journal The Innovation Platform.) We will focus on how to coordinate the physics of performing dynamical coupled-channel analyses on the reaction data of πN and g()N->ππN and KY. This will require a full amplitude and partial-wave analysis to constrain the pion- and electron-induced N production. We will also discuss spanning the gap of the space-like (q2 < 0) and time-like (q2 > 0) divide anchored by the photoproduction data at q2 = 0. There will be a short presentation on exploring the production of N*s with pion and electron beams, followed by a panel discussion and open forum.
[1] https://edition.pagesuite.com/html5/reader/production/default.aspx?pubname=&edid=34216959-80ec-4ce6-af9a-b90be9d71c84&pnum=288
