Chiral Magnetism of the Nucleon

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dc.creatorHemmert, Thomas R.
dc.creatorWeise, Wolfram
dc.date2002-04-05
dc.date.accessioned2026-07-07T03:38:47Z
dc.date.available2026-07-07T03:38:47Z
dc.descriptionWe study the quark mass expansion of the magnetic moments of the nucleon in a chiral effective field theory including nucleons, pions and delta resonances as explicit degrees of freedom. We point out that the usual powercounting applied so far to this problem misses important quark mass structures generated via an intermediate isovector M1 nucleon-delta transition. We propose a modified powercounting and compare the resulting chiral extrapolation function to available (quenched) lattice data. The extrapolation is found to work surprisingly well, given that the lattice data result from rather large quark masses. Our calculation raises the hope that extrapolations of lattice data utilizing chiral effective field theory might be applicable over a wider range in quark masses than previously thought, and we discuss some open questions in this context. Furthermore, we observe that within the current lattice data uncertainties the extrapolations presented here are consistent with the Pade fit ansatz introduced by the Adelaide group a few years ago.
dc.description30 pages, Latex, 7 figures
dc.identifierhttps://arxiv.org/abs/hep-lat/0204005
dc.identifierhttp://arxiv.org/abs/hep-lat/0204005
dc.identifierEur.Phys.J. A15 (2002) 487-504
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/38672
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleChiral Magnetism of the Nucleon
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