dorsal/arxiv
View SchemaThe Drell-Hearn-Gerasimov Sum Rule
| Authors | D. Drechsel |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9411034 |
| URL | https://arxiv.org/abs/nucl-th/9411034 |
| DOI | 10.1016/0146-6410(95)00014-A |
| Journal | Prog.Part.Nucl.Phys.34:181-200,1995 |
Abstract
The Drell-Hearn-Gerasimov (DHG) sum rule relates the helicity structure of the photoabsorption cross section to the anomalous magnetic moment of the nucleon. It is based on Lorentz and gauge invariance, crossing symmetry, causality and unitarity. A generalized DHG sum rule my be derived for virtual photons. At low momentum transfer this generalized sum rule is saturated by the resonance region, at high momentum transfer it may be expressed by the parton spin distributions measured in deep inelastic scattering. The longitudinal-transverse interference determines the Cottingham sum rule, which is related to the electric and magnetic form factors over the whole range of momentum transfer.
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"abstract": "The Drell-Hearn-Gerasimov (DHG) sum rule relates the helicity structure of\nthe photoabsorption cross section to the anomalous magnetic moment of the\nnucleon. It is based on Lorentz and gauge invariance, crossing symmetry,\ncausality and unitarity. A generalized DHG sum rule my be derived for virtual\nphotons. At low momentum transfer this generalized sum rule is saturated by the\nresonance region, at high momentum transfer it may be expressed by the parton\nspin distributions measured in deep inelastic scattering. The\nlongitudinal-transverse interference determines the Cottingham sum rule, which\nis related to the electric and magnetic form factors over the whole range of\nmomentum transfer.",
"arxiv_id": "nucl-th/9411034",
"authors": [
"D. Drechsel"
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"nucl-th"
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"doi": "10.1016/0146-6410(95)00014-A",
"journal_ref": "Prog.Part.Nucl.Phys.34:181-200,1995",
"title": "The Drell-Hearn-Gerasimov Sum Rule",
"url": "https://arxiv.org/abs/nucl-th/9411034"
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