Aznauryan, I. G. and Bashir, A. and Braun, V. M. and Brodsky, S. J. and Burkert, V. D. and Chang, L. and Chen, Ch and El-Bennich, B. and Cloet, I. C. and Cole, P. L. and Edwards, R. G. and Fedotov, G. V. and Giannini, M. M. and Gothe, R. W. and Gross, F. and Lin, Huey-Wen and Kroll, P. and Lee, T. -S. H. and Melnitchouk, W. and Mokeev, V. I. and Pena, M. T. and Ramalho, G. and Roberts, C. D. and Santopinto, E. and de Teramond, G. F. and Tsushima, K. and Wilson, D. J. (2013) STUDIES OF NUCLEON RESONANCE STRUCTURE IN EXCLUSIVE MESON ELECTROPRODUCTION. INTERNATIONAL JOURNAL OF MODERN PHYSICS E, 22 (6): 1330015. ISSN 0218-3013, 1793-6608
Full text not available from this repository. (Request a copy)Abstract
Studies of the structure of excited baryons are key factors to the N* program at Jefferson Lab (JLab). Within the first year of data taking with the Hall B CLAS12 detector following the 12 GeV upgrade, a dedicated experiment will aim to extract the N* electrocouplings at high photon virtualities Q(2). This experiment will allow exploration of the structure of N* resonances at the highest photon virtualities ever achieved, with a kinematic reach up to Q(2) = 12 GeV2. This high-Q(2) reach will make it possible to probe the excited nucleon structures at distance scales ranging from where effective degrees of freedom, such as constituent quarks, are dominant through the transition to where nearly massless bare-quark degrees of freedom are relevant. In this document, we present a detailed description of the physics that can be addressed through N* structure studies in exclusive meson electroproduction. The discussion includes recent advances in reaction theory for extracting N* electrocouplings from meson electroproduction off protons, along with Quantum Chromodynamics (QCD)-based approaches to the theoretical interpretation of these fundamental quantities. This program will afford access to the dynamics of the nonperturbative strong interaction responsible for resonance formation, and will be crucial in understanding the nature of confinement and dynamical chiral symmetry breaking in baryons, and how excited nucleons emerge from QCD.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRANSITION FORM-FACTORS; QUARK-HADRON DUALITY; BARYON RESONANCES; GAMMA-ASTERISK; QQQQ(Q)OVER-BAR COMPONENTS; CORRESPONDENCE ARGUMENTS; ELECTRON-SCATTERING; 3-QUARK OPERATORS; ROPER RESONANCE; CROSS-SECTIONS; Electromagnetic form-factors; baryon resonances; meson production; lattice QCD calculations; quark models; dispersion relations; nonperturbative QCD; confinement; dynamical chiral symmetry breaking; CLAS; Jefferson lab |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Braun > Group Vladimir Braun |
| Depositing User: | Petra Gürster |
| Date Deposited: | 16 Jun 2020 06:11 |
| Last Modified: | 16 Jun 2020 06:11 |
| URI: | https://pred.uni-regensburg.de/id/eprint/16544 |
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