Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-10-17
PoS CD09:092,2009
Physics
High Energy Physics
High Energy Physics - Lattice
9 pages, 6 figures, Invited Talk at the 6th International Workshop on Chiral Dynamics, CD09, July 6-10, 2009, Bern, Switzerlan
Scientific paper
We discuss the techniques to extract the electromagnetic Delta form factors in Lattice QCD. We evaluate these form factors using dynamical fermions with smallest pion mass of about 350 MeV. We pay particular attention to the extraction of the electric quadrupole form factor that signals a deformation of the Delta. The magnetic moment of the $\Delta$ is extrapolated using a chiral effective field theory. Using the form factors we evaluate the transverse density distributions in the infinite momentum frame showing deformation in the Delta.
Alexandrou Constantia
Korzec Tomasz
Koutsou Giannis
Lorce Cedric
Negele John W.
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