Vector resonances and electromagnetic nucleon structure

Williams, R A; Krewald, S; Linen, K

doi:10.1103/PhysRevC.51.566

Title: Vector resonances and electromagnetic nucleon structure

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Abstract

Motivated by new, precise magnetic proton form factor data in the timelike reigon, a hybrid vector meson dominance (hVMD) formalism is employed to investigate the significance of excited vector meson rsonances on electromagnetic nucleon structure. We find that the [rho](1700), [omega](1600), and two previously unobserved states are required to reproduce the local structure seen in the new LEAR data just above the [ital p[bar p]] threshold. We also investigate sensitivity to the [phi] meson. The model dependence of our result is tested by introducing an alternative model which couples the isoscalar vector meson states to a hypothetical vector glueball resonance. We obtain nearly identical results from both models, except for [ital G][sub [ital E]][sup [ital n]]([ital q][sup 2]) in the spacelike region which is very sensitive to the glueball mass and the effective [phi][ital NN] coupling.

Authors:

Williams, R A; Krewald, S; Linen, K ^[1]

Continuous Electron Beam Accelerator Facility, Newport News, Virginia 23606 (United States)

Publication Date:: Wed Feb 01 00:00:00 EST 1995

OSTI Identifier:: 6603730

Resource Type:: Journal Article

Journal Name:: Physical Review, C (Nuclear Physics); (United States)

Additional Journal Information:: Journal Volume: 51:2; Journal ID: ISSN 0556-2813

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; NUCLEONS; ELECTROMAGNETIC FORM FACTORS; VECTOR MESONS; RESONANCE; MOMENTUM TRANSFER; QUANTUM CHROMODYNAMICS; SENSITIVITY; VECTOR DOMINANCE MODEL; BARYONS; BOSONS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; FORM FACTORS; HADRONS; MATHEMATICAL MODELS; MESONS; PARTICLE MODELS; PARTICLE PROPERTIES; QUANTUM FIELD THEORY; 662390* - Electromagnetic Processes & Properties- (1992-); 662240 - Models for Strong Interactions- (1992-)

Citation Formats


                    Williams, R A, Krewald, S, and Linen, K. Vector resonances and electromagnetic nucleon structure.  United States: N. p., 1995. 
        Web.  doi:10.1103/PhysRevC.51.566.

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                    Williams, R A, Krewald, S, & Linen, K. Vector resonances and electromagnetic nucleon structure.  United States.  https://doi.org/10.1103/PhysRevC.51.566

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                    Williams, R A, Krewald, S, and Linen, K. 1995.  
        "Vector resonances and electromagnetic nucleon structure".  United States.  https://doi.org/10.1103/PhysRevC.51.566.

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@article{osti_6603730,

  title        = {Vector resonances and electromagnetic nucleon structure},

  author       = {Williams, R A and Krewald, S and Linen, K},

  abstractNote = {Motivated by new, precise magnetic proton form factor data in the timelike reigon, a hybrid vector meson dominance (hVMD) formalism is employed to investigate the significance of excited vector meson rsonances on electromagnetic nucleon structure. We find that the [rho](1700), [omega](1600), and two previously unobserved states are required to reproduce the local structure seen in the new LEAR data just above the [ital p[bar p]] threshold. We also investigate sensitivity to the [phi] meson. The model dependence of our result is tested by introducing an alternative model which couples the isoscalar vector meson states to a hypothetical vector glueball resonance. We obtain nearly identical results from both models, except for [ital G][sub [ital E]][sup [ital n]]([ital q][sup 2]) in the spacelike region which is very sensitive to the glueball mass and the effective [phi][ital NN] coupling.},

  doi          = {10.1103/PhysRevC.51.566},

  url          = {https://www.osti.gov/biblio/6603730},
  journal      = {Physical Review, C (Nuclear Physics); (United States)},

  issn         = {0556-2813},

  number       = ,

  volume       = 51:2,

  place        = {United States},

  year         = {Wed Feb 01 00:00:00 EST 1995},

  month        = {Wed Feb 01 00:00:00 EST 1995}

}

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