delta-baryon electromagnetic form factors in lattice QCD
Author(s)Alexandrou, Constantia; Korzec, Tomasz; Koutsou, Giannis; Lorce, C.; Negele, John W.; Pascalutsa, V.; Tsapalis, A.; Vanderhaeghen, M.; ... Show more Show less
Δ-baryon electromagnetic form factors in lattice QCD
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We develop techniques to calculate the four Δ electromagnetic form factors using lattice QCD, with particular emphasis on the subdominant electric quadrupole form factor that probes deformation of the Δ. Results are presented for pion masses down to approximately 350 MeV for three cases: quenched QCD, two flavors of dynamical Wilson quarks, and three flavors of quarks described by a mixed action combining domain-wall valence quarks and dynamical staggered sea quarks. The magnetic moment of the Δ is compared with chiral effective field theory calculations and the Δ charge density distributions are discussed.
DepartmentMassachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Physical Review D
American Physical Society
Alexandrou, C. et al. "delta-baryon electromagnetic form factors in lattice QCD." Physical Review D 79.1 (2009): 014507.
Final published version