Gauge invariance and the electromagnetic current of composite pions

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Description

The Global Color-symmetry Model of QCD is extended to deal with a background electromagnetic field, and the associated conserved current is identified for the finite size {bar q}q pion modes at tree level. A well-defined truncation issued that factorizes the bilocal pion field into a local field variable and a hadronic form factor having a ladder Bethe-Salpeter content. The associated pion charge form factor is formulated. These developments are used to provide an illustration of how an effective hadronic action containing form factors may be electromagnetically coupled in a gauge invariant way that is accountable to its field substructure. In ... continued below

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27 p.

Creation Information

Frank, M. R. & Tandy, P. C. March 24, 1993.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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  • Frank, M. R. Continuous Electron Beam Accelerator Facility, Newport News, VA (United States)
  • Tandy, P. C. Kent State Univ., OH (United States). Center for Nuclear Research

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Description

The Global Color-symmetry Model of QCD is extended to deal with a background electromagnetic field, and the associated conserved current is identified for the finite size {bar q}q pion modes at tree level. A well-defined truncation issued that factorizes the bilocal pion field into a local field variable and a hadronic form factor having a ladder Bethe-Salpeter content. The associated pion charge form factor is formulated. These developments are used to provide an illustration of how an effective hadronic action containing form factors may be electromagnetically coupled in a gauge invariant way that is accountable to its field substructure. In particular, the Ward-Takahashi identity for the photon vertex appropriate to the localized pion fields is seen to contain the hadronic form factors. In this context, gauge invariance of the effective hadronic action also requires recognition of the fact that the free inverse propagator for the localized pion field gauge transforms due to the substructure field content that has been absorbed into it.

Physical Description

27 p.

Notes

INIS; OSTI as DE94007266; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

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  • Other Information: PBD: 24 Mar 1993

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  • Other: DE94007266
  • Report No.: DOE/ER/40561--116
  • Grant Number: FG06-90ER40561
  • DOI: 10.2172/10128227 | External Link
  • Office of Scientific & Technical Information Report Number: 10128227
  • Archival Resource Key: ark:/67531/metadc1318299

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • March 24, 1993

Added to The UNT Digital Library

  • Nov. 3, 2018, 11:47 a.m.

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Frank, M. R. & Tandy, P. C. Gauge invariance and the electromagnetic current of composite pions, report, March 24, 1993; United States. (https://digital.library.unt.edu/ark:/67531/metadc1318299/: accessed March 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.