Delta-baryon electromagnetic form factors in lattice QCD

Details Delta-baryon electromagnetic form factors in lattice QCD Delta-baryon electromagnetic form factors in lattice QCD

2008-10-22

arxiv.org/abs/0810.3976v1

Phys.Rev.D79:014507,2009

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages, 5 figures

Scientific paper

10.1103/PhysRevD.79.014507

We develop techniques to calculate the four Delta electromagnetic form factors using lattice QCD, with particular emphasis on the sub-dominant electric quadrupole form factor that probes deformation of the Delta. 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 Delta is chirally extrapolated to the physical point and the Delta charge density distributions are discussed.

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