Diehl, S. and Joo, K. and Semenov-Tian-Shansky, K. and Weiss, C. and Braun, Vladimir M. and Chang, W. C. and Chatagnon, P. and Constantinou, M. and Guo, Y. and Hutauruk, P. T. P. and Jo, H. S. and Kim, A. and Kim, J. -y. and Kroll, P. and Kumano, S. and Lee, C. -h. and Liuti, S. and Mcnulty, R. and Son, H. -d. and Sznajder, P. and Usman, A. and Van Hulse, C. and Vanderhaeghen, M. and Winn, M. (2025) Exploring baryon resonances with transition generalized parton distributions: status and perspectives. EUROPEAN PHYSICAL JOURNAL A, 61 (6): 131. ISSN 1434-6001, 1434-601X
Full text not available from this repository. (Request a copy)Abstract
QCD gives rise to a rich spectrum of excited baryon states. Understanding their internal structure is important for many areas of nuclear physics, such as nuclear forces, dense matter, and neutrino-nucleus interactions. Generalized parton distributions (GPDs) are an established tool for characterizing the QCD structure of the ground-state nucleon. They are used to create 3D tomographic images of the quark/gluon structure and quantify the mechanical properties such as the distribution of mass, angular momentum, and forces in the system. Transition GPDs extend these concepts to N -> N & lowast;\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$N \rightarrow N<^>*$$\end{document} transitions and can be used to characterize the 3D structure and mechanical properties of baryon resonances. They can be probed in high-momentum-transfer exclusive electroproduction processes with resonance transitions e+N -> e '+M+N & lowast;\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$e + N \rightarrow e' + M + N<^>*$$\end{document}, such as deeply-virtual Compton scattering (M=gamma\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$M = \gamma $$\end{document}) or meson production (M=pi,K\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$M = \pi , K$$\end{document}, etc.), and in related photon/hadron-induced processes. This White Paper describes a research program aiming to explore baryon resonance structure with transition GPDs. This includes the properties and interpretation of the transition GPDs, theoretical methods for structures and processes, first experimental results from JLab 12 GeV, future measurements with existing and planned facilities (JLab detector and energy upgrades, COMPASS/AMBER, EIC, EicC, J-PARC, LHC ultraperipheral collisions), and the theoretical and experimental developments needed to realize this program.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIRTUAL COMPTON-SCATTERING; PB-PB COLLISIONS; HARD EXCLUSIVE ELECTROPRODUCTION; SPIN-FLAVOR STRUCTURE; SOFT PION EMISSION; J/PSI MESONS; COHERENT J/PSI; ELECTROMAGNETIC-EXCITATION; INELASTIC PHOTOPRODUCTION; PSI' PHOTOPRODUCTION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Braun > Group Vladimir Braun |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Mar 2026 07:03 |
| Last Modified: | 31 Mar 2026 07:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/67887 |
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