The N to Delta electromagnetic transition form factors from Lattice QCD

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dc.creatorAlexandrou, C.
dc.creatorde Forcrand, Ph.
dc.creatorNeff, H.
dc.creatorNegele, J. W.
dc.creatorSchroers, W.
dc.creatorTsapalis, A.
dc.date2004-09-19
dc.date.accessioned2026-07-07T11:30:50Z
dc.date.available2026-07-07T11:30:50Z
dc.descriptionThe magnetic dipole, the electric quadrupole and the Coulomb quadrupole amplitudes for the transition γN\to Δare calculated in quenched lattice QCD at β=6.0 with Wilson fermions. Using a new method combining an optimal combination of interpolating fields for the $Δ$ and an overconstrained analysis, we obtain statistically accurate results for the dipole form factor and for the ratios of the electric and Coulomb quadrupole amplitudes to the magnetic dipole amplitude, R_{EM} and R_{SM}, up to momentum transfer squared 1.5 GeV^2. We show for the first time using lattice QCD that both R_{EM} and R_{SM} are non-zero and negative, in qualitative agreement with experiment and indicating the presence of deformation in the N- Delta system.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/hep-lat/0409122
dc.identifierhttp://arxiv.org/abs/hep-lat/0409122
dc.identifierPhys.Rev.Lett.94:021601,2005
dc.identifierdoi:10.1103/PhysRevLett.94.021601
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197096
dc.subjectHigh Energy Physics - Lattice
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleThe N to Delta electromagnetic transition form factors from Lattice QCD
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