Local gauge invariance implies Siegert's hypothesis

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dc.creatorNaus, H. W. L.
dc.date1996-08-29
dc.date.accessioned2026-07-07T11:15:54Z
dc.date.available2026-07-07T11:15:54Z
dc.descriptionThe nonrelativistic Ward-Takahashi identity, a consequence of local gauge invariance in quantum mechanics, shows the necessity of exchange current contributions in case of nonlocal and/or isospin-dependent potentials. It also implies Siegert's hypothesis: in the nonrelativistic limit, two-body charge densities identically vanish. Neither current conservation, which follows from global gauge invariance, nor the constraints of (lowest order) relativity are sufficient to arrive at this result. Furthermore, a low-energy theorem for exchange contributions is established.
dc.description5 pages, REVTEX
dc.identifierhttps://arxiv.org/abs/nucl-th/9608063
dc.identifierhttp://arxiv.org/abs/nucl-th/9608063
dc.identifierPhys.Rev.C55:1580-1582,1997
dc.identifierdoi:10.1103/PhysRevC.55.1580
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192537
dc.subjectNuclear Theory
dc.titleLocal gauge invariance implies Siegert's hypothesis
dc.typetext

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