Gauge fields, hidden local symmetries, and meson exchange currents

Smejkal, J.; Truhlík, E.; Göller, H.

doi:10.1016/s0375-9474(97)00369-2

Cited by 18 publications

(39 citation statements)

References 40 publications

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“…This maximum, however, was not seen in the data. Cross sections for d(e,e') predicted using quark-based models [189,187], or a chiral Lagrangian [190].…”

Section: Electrodisintegrationmentioning

confidence: 99%

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Elastic electron scattering from light nuclei

Sick

2001

Progress in Particle and Nuclear Physics

108

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The charge and magnetic form factors of light nuclei, mainly for mass number A≤4, provide a sensitive test of our understanding of nuclei. A number of "exact" calculations of the wave functions starting from the nucleon-nucleon interaction are available. The treatment of two-body effects needed in the calculation of the electromagnetic form factors has made significant progress. Many electron scattering experiments have provided an extensive data base from which the various (mainly elastic) form factors can be extracted. This review discusses the data and the determination of the form factors, and compares them to the results of theory.

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“…This maximum, however, was not seen in the data. Cross sections for d(e,e') predicted using quark-based models [189,187], or a chiral Lagrangian [190].…”

Section: Electrodisintegrationmentioning

confidence: 99%

“…Smejkal et al [190] construct a Lagrangian in terms of N, π, ρ and A 1 . The exchange terms include π and ρ exchange and A 1 − π exchange.…”

Section: Electrodisintegrationmentioning

confidence: 99%

Elastic electron scattering from light nuclei

Sick

2001

Progress in Particle and Nuclear Physics

108

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“…We shall first study the structure of the pion electroproduction amplitude derived from chiral Lagrangians based on the local chiral symmetry SU (2) × SU (2) [3], [21], [22], [23]. These models have recently been used [26] to construct the one-boson axial exchange currents for the Bethe-Salpeter equation and the transition amplitude for the radiative muon capture by proton [3].…”

Section: ô û ¨¨¨ä ª ªmentioning

confidence: 99%

“…We use first a minimal Lagrangian [21], built in terms of the Yang-Mills gauge fields, for the direct construction of the pion electroproduction amplitude. For the Lagrangian [23] reflecting the hidden local SU (2) × SU (2) symmetry [24], [25], we first construct the currentcurrent amplitudes and then we calculate the divergence. We show that besides the amplitudes of Fig.…”

Section: ô û ¨¨¨ä ª ªmentioning

confidence: 99%

Pion electroproduction amplitude

Truhlík¹

2001

Phys. Rev. C

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We analyze amplitudes for the pion electroproduction on proton derived from Lagrangians based on the local chiral SU (2) × SU (2) symmetries. We show that such amplitudes do contain information on the nucleon weak axial form factor FA in both soft and hard pion regimes. This result invalidates recent Haberzettl's claim that the pion electroproduction at threshold cannot be used to extract any information regarding FA.

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“…It can be easily extended to contain also the ω meson field. Then we introduce the HLS Lagrangian L H [32], [41] and discuss possible source of the model dependence of our MEC operators.…”

Section: Chiral Lagrangiansmentioning

confidence: 99%