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Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction

Fuente: arXiv

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Auteurs principaux:	Aznauryan, I. G., Bashir, A., Braun, V., Brodsky, S. J., Burkert, V. D., Chang, L., Chen, Ch., El-Bennich, B., Cloët, I. C., Cole, P. L., Edwards, R. G., Fedotov, G. V., Giannini, M. M., Gothe, R. W., Gross, F., Lin, Huey-Wen, Kroll, P., Lee, T. -S. H., Melnitchouk, W., Mokeev, V. I., Peña, M. T., Ramalho, G., Roberts, C. D., Santopinto, E., de Teramond, G. F., Tsushima, K., Wilson, D. J.
Format:	Preprint
Publié:	2012
Sujets:	Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment
Accès en ligne:	Acceder al recurso
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_version_	1866916554990419968
author	Aznauryan, I. G. Bashir, A. Braun, V. Brodsky, S. J. Burkert, V. D. Chang, L. Chen, Ch. El-Bennich, B. Cloët, I. C. Cole, P. L. Edwards, R. G. Fedotov, G. V. Giannini, M. M. Gothe, R. W. Gross, F. Lin, Huey-Wen Kroll, P. Lee, T. -S. H. Melnitchouk, W. Mokeev, V. I. Peña, M. T. Ramalho, G. Roberts, C. D. Santopinto, E. de Teramond, G. F. Tsushima, K. Wilson, D. J.
author_facet	Aznauryan, I. G. Bashir, A. Braun, V. Brodsky, S. J. Burkert, V. D. Chang, L. Chen, Ch. El-Bennich, B. Cloët, I. C. Cole, P. L. Edwards, R. G. Fedotov, G. V. Giannini, M. M. Gothe, R. W. Gross, F. Lin, Huey-Wen Kroll, P. Lee, T. -S. H. Melnitchouk, W. Mokeev, V. I. Peña, M. T. Ramalho, G. Roberts, C. D. Santopinto, E. de Teramond, G. F. Tsushima, K. Wilson, D. J.
contents	Studies of the structure of excited baryons are key to the N* program at Jefferson Lab. 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 Q2. This experiment will allow exploration of the structure of N* resonances at the highest photon virtualities ever yet achieved, with a kinematic reach up to Q2 = 12 GeV2. This high-Q2 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 QCD-based approaches to the theoretical interpretation of these fundamental quantities. This program will afford access to the dynamics of the non-perturbative 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.
format	Preprint
id	arxiv_https___arxiv_org_abs_1212_4891
institution	arXiv
publishDate	2012
record_format	arxiv
spellingShingle	Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction Aznauryan, I. G. Bashir, A. Braun, V. Brodsky, S. J. Burkert, V. D. Chang, L. Chen, Ch. El-Bennich, B. Cloët, I. C. Cole, P. L. Edwards, R. G. Fedotov, G. V. Giannini, M. M. Gothe, R. W. Gross, F. Lin, Huey-Wen Kroll, P. Lee, T. -S. H. Melnitchouk, W. Mokeev, V. I. Peña, M. T. Ramalho, G. Roberts, C. D. Santopinto, E. de Teramond, G. F. Tsushima, K. Wilson, D. J. Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment Studies of the structure of excited baryons are key to the N* program at Jefferson Lab. 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 Q2. This experiment will allow exploration of the structure of N* resonances at the highest photon virtualities ever yet achieved, with a kinematic reach up to Q2 = 12 GeV2. This high-Q2 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 QCD-based approaches to the theoretical interpretation of these fundamental quantities. This program will afford access to the dynamics of the non-perturbative 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.
title	Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction
topic	Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment
url	https://arxiv.org/abs/1212.4891