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Title: Workshop on CEBAF at higher energies

Abstract

Since the current parameters of CEBAF were defined almost a decade ago, there has been a remarkably fruitful evolution of our picture of the behavior of strongly interacting matter that apparently could be addressed by CEBAF at higher energies. Favorable technical developments coupled with foresight in initial laboratory planning have now made it feasible to consider approximately doubling CEBAF`s current design energy of 4 GeV to approach 10 GeV at rather modest cost. The purpose of the workshop, sponsored by the CEBAF User Group, was to begin to develop the next phase of CEBAF`s program by giving the entire community the opportunity to participate in defining the future of our field, and in particular the physics accessible with an upgraded CEBAF energy. It is intended that this report mark the first step toward an ultimate goal of defining a physics program that will form the basis for an upgrade of CEBAF. The report begins with a brief overview of the workshop`s conclusions. Its body consists of sections corresponding to the workshop`s Working Groups on Hadron Spectroscopy and Production, High Q{sup 2} Form Factors and Exclusive Reactions, Inclusive and Semi-Inclusive Processes, and Hadrons in the Nuclear Medium. Each section begins withmore » the working group summaries and is followed by associated plenary talks summarizing the outstanding physics issues addressable by an upgrade, which are in turn followed by individual contributions presenting specific physics programs. An appendix describes capabilities of CEBAF`s current experimental equipment at higher energies; another appendix lists workshop participants. Selected papers have been processed separately for inclusion in the Energy Science and Technology Database.« less

Authors:
;  [1]
  1. eds.
Publication Date:
Research Org.:
Southeastern Universities Research Association, Inc., Newport News, VA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
113689
Report Number(s):
DOE/ER/40150-299; CONF-9404197-; CEBAF-R-95-001
ON: DE96001410; TRN: 95:023320
DOE Contract Number:
AC05-84ER40150
Resource Type:
Conference
Resource Relation:
Conference: Workshop on CEBAF at higher energies, Newport News, VA (United States), 14-16 Apr 1994; Other Information: PBD: Apr 1994
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; CEBAF ACCELERATOR; FEASIBILITY STUDIES; HADRONS; FORM FACTORS; PARTICLE PRODUCTION; INCLUSIVE INTERACTIONS; SEMI-INCLUSIVE INTERACTIONS; EXCLUSIVE INTERACTIONS; BARYON SPECTROSCOPY; MESON SPECTROSCOPY; NUCLEAR STRUCTURE; NUCLEAR POTENTIAL; NUCLEAR FORCES; QUANTUM CHROMODYNAMICS; LEADING ABSTRACT; PROCEEDINGS

Citation Formats

Isgur, N., and Stoler, P.. Workshop on CEBAF at higher energies. United States: N. p., 1994. Web.
Isgur, N., & Stoler, P.. Workshop on CEBAF at higher energies. United States.
Isgur, N., and Stoler, P.. Fri . "Workshop on CEBAF at higher energies". United States. doi:. https://www.osti.gov/servlets/purl/113689.
@article{osti_113689,
title = {Workshop on CEBAF at higher energies},
author = {Isgur, N. and Stoler, P.},
abstractNote = {Since the current parameters of CEBAF were defined almost a decade ago, there has been a remarkably fruitful evolution of our picture of the behavior of strongly interacting matter that apparently could be addressed by CEBAF at higher energies. Favorable technical developments coupled with foresight in initial laboratory planning have now made it feasible to consider approximately doubling CEBAF`s current design energy of 4 GeV to approach 10 GeV at rather modest cost. The purpose of the workshop, sponsored by the CEBAF User Group, was to begin to develop the next phase of CEBAF`s program by giving the entire community the opportunity to participate in defining the future of our field, and in particular the physics accessible with an upgraded CEBAF energy. It is intended that this report mark the first step toward an ultimate goal of defining a physics program that will form the basis for an upgrade of CEBAF. The report begins with a brief overview of the workshop`s conclusions. Its body consists of sections corresponding to the workshop`s Working Groups on Hadron Spectroscopy and Production, High Q{sup 2} Form Factors and Exclusive Reactions, Inclusive and Semi-Inclusive Processes, and Hadrons in the Nuclear Medium. Each section begins with the working group summaries and is followed by associated plenary talks summarizing the outstanding physics issues addressable by an upgrade, which are in turn followed by individual contributions presenting specific physics programs. An appendix describes capabilities of CEBAF`s current experimental equipment at higher energies; another appendix lists workshop participants. Selected papers have been processed separately for inclusion in the Energy Science and Technology Database.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Apr 01 00:00:00 EST 1994},
month = {Fri Apr 01 00:00:00 EST 1994}
}

Conference:
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  • This report summarizes topics in hadron spectroscopy and production which could be addressed at CEBAF with an energy upgrade to E{sub gamma} = 8 GeV and beyond. The topics discussed include conventional meson and baryon spectroscopy, spectroscopy of exotica (especially molecules and hybrids), CP and CPT tests using {phi} mesons, and new detector and accelerator options.
  • This report summarizes topics in hadron spectroscopy and production which could be addressed at CEBAF with an energy upgrade to E{sub {gamma}} = 8 GeV and beyond. The topics discussed include conventional meson and baryon spectrocopy, spectroscopy of exotica (especially molecules and hybrids), CP and CPT tests using {phi} mesons, and new detector and accelerator options.
  • Our earliest and most successful understanding of meson and baryon structure has been based on a model of constituent quarks moving in a phenomenological mean field which is supposed to represent the effects of complicated, but as yet uncalculated, gluonic interactions. Refinements to such models in terms of residual interactions such as color hyperfine interactions improve agreement with experimental spectroscopy. As momentum transfers increase this type of simple model becomes inadequate and one must search for additional degrees of freedom to account for the observed data. However, since these models are not fundamental, the pursuit to apply it to regionsmore » of ever increasing momentum transfer becomes fruitless. The constituent quarks themselves are the manifestations of a complexity of interacting valence quarks, sea quarks and gluons in the non-perturbative domain, and it is in terms of these fundamental entities which one must learn to describe mesons and baryons. The situation is analogous to that of the nucleus. A great deal of theoretical effort has gone into models involving constituent protons and neutrons, with interactions modeled in terms of meson fields. Thus, many of the low energy properties of nuclear matter are well described in terms of a mean field shell model, with residual perturbative nucleon-nucleon interactions. However, with increasing momentum transfer (resolution) the model becomes more complicated and eventually, as in the case of the baryon, less useful. A more fundamental approach requires the description of nuclear matter in terms of the variables of QCD in the non-perturbative domain. The fact that this may prove to be a very difficult task does not in any way diminish its importance.« less
  • The electromagnetic production of strangeness, the physics of exciting systems having strangeness degrees of freedom (production of hadrons with one or more strange constituent quarks) using electromagnetic probes (real or virtual photons), is one of the frontier areas of research which will be investigated at the Continuous Electron Beam Accelerator Facility (CEBAF) when it becomes operational. CEBAF is expected to have an important impact upon this field of research using its specialized set of detection instruments and high quality electron beam. This paper focusses upon one aspect of the associated production of strangeness - the determination of the kaon electromagneticmore » form factor at high squared momentum transfers.« less
  • The possibility exists for extending a planned measurement of the neutron magnetic form factor to higher values of momentum transfer. The theoretical interest and the experimental method are described. Problems associated with higher Q{sup 2} measurements are discussed. It is concluded that measurements of moderate precision may be possible up to a Q{sup 2} of 8-9.5 GeV{sup 2}, more than doubling the range of the data currently available.