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Bernard, V. [Author]; Hemmert, T. [Author]; Meissner, U.G. [Author]

Novel analysis of chiral loop effects in the generalized Gerasimov-Drell-Hearn sum rule

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  • Media type: E-Article
  • Title: Novel analysis of chiral loop effects in the generalized Gerasimov-Drell-Hearn sum rule
  • Contributor: Bernard, V. [Author]; Hemmert, T. [Author]; Meissner, U.G. [Author]
  • imprint: North-Holland Publ., 2002
  • Published in: Physics letters / B 545, 105 - 111 (2002). doi:10.1016/S0370-2693(02)02584-4
  • Language: English
  • DOI: https://doi.org/10.1016/S0370-2693(02)02584-4
  • ISSN: 0370-2693
  • Keywords: Compton scattering: off-shell ; invariance: Lorentz ; Feynman graph: higher-order ; perturbation theory: chiral ; photon nucleon: elastic scattering ; structure function ; numerical calculations ; spin dependence ; sum rule: Drell-Hearn-Gerasimov
  • Origination:
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  • Description: We study the chiral loop corrections to the generalized Gerasimov-Drell-Hearn sum rule of the nucleon for finite photon virtuality in the framework of a Lorentz-invariant formulation of baryon chiral perturbation theory. We perform a complete one-loop calculation and obtain significant differences to previously found results based on the heavy baryon approach for the proton and neutron spin-dependent forward Compton amplitudes. (C) 2002 Elsevier Science B.V. All rights reserved.
  • Access State: Open Access