dc.contributor.author | Alexandrou, Constantia | en |
dc.contributor.author | Korzec, T. | en |
dc.contributor.author | Koutsou, Giannis | en |
dc.contributor.author | Lorcé, C. | en |
dc.contributor.author | Negele, J. W. | en |
dc.contributor.author | Pascalutsa, V. | en |
dc.contributor.author | Tsapalis, Antonios | en |
dc.contributor.author | Vanderhaeghen, M. | en |
dc.creator | Alexandrou, Constantia | en |
dc.creator | Korzec, T. | en |
dc.creator | Koutsou, Giannis | en |
dc.creator | Lorcé, C. | en |
dc.creator | Negele, J. W. | en |
dc.creator | Pascalutsa, V. | en |
dc.creator | Tsapalis, Antonios | en |
dc.creator | Vanderhaeghen, M. | en |
dc.date.accessioned | 2019-12-02T15:28:24Z | |
dc.date.available | 2019-12-02T15:28:24Z | |
dc.date.issued | 2009 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/58436 | |
dc.description.abstract | We extend the formalism relating electromagnetic form factors to transverse quark charge densities in the light-front frame to the case of a spin-3/2 baryon and calculate these transverse densities for the Δ (1232) isobar using lattice QCD. The transverse charge densities for a transversely polarized spin-3/2 particle are characterized by monopole, dipole, quadrupole, and octupole patterns representing the structure beyond that of a pure point-like spin-3/2 particle. We present lattice QCD results for the Δ-isobar electromagnetic form factors for pion masses down to approximatively 350 MeV for three cases: quenched QCD, two-degenerate flavors of dynamical Wilson quarks, and three flavors of quarks using a mixed action that combines domain wall valence quarks and dynamical staggered sea quarks. We extract transverse quark charge densities from these lattice results and find that the Δ is prolately deformed, as indicated by the fact that the quadrupole moment GE 2 (0) is larger than the value -3 characterizing a point particle and the fact that the transverse charge density in a Δ+ of maximal transverse spin projection is elongated along the axis of the spin. © 2009 Elsevier B.V. All rights reserved. | en |
dc.source | Nuclear Physics A | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-65549100988&doi=10.1016%2fj.nuclphysa.2009.04.005&partnerID=40&md5=fb5205f0fbf20150b212823a9f36b597 | |
dc.subject | Δ-resonance | el |
dc.subject | Electromagnetic form factors | en |
dc.subject | Electric and magnetic moments | en |
dc.title | Quark transverse charge densities in the Δ (1232) from lattice QCD | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1016/j.nuclphysa.2009.04.005 | |
dc.description.volume | 825 | |
dc.description.issue | 1-2 | |
dc.description.startingpage | 115 | |
dc.description.endingpage | 144 | |
dc.author.faculty | Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Φυσικής / Department of Physics | |
dc.type.uhtype | Article | en |
dc.source.abbreviation | Nucl.Phys.A | en |
dc.contributor.orcid | Alexandrou, Constantia [0000-0001-9136-3621] | |
dc.gnosis.orcid | 0000-0001-9136-3621 | |