A. Tsapalis

Nucleon electromagnetic form factors from lattice QCD

We evaluate the isovector nucleon electromagnetic form factors in quenched and unquenched QCD on the lattice using Wilson fermions. In the quenched theory we use a lattice of spatial size 3 fm at

The static three-quark SU(3) and four-quark SU(4) potentials

\ensuremath{\beta}=6.0

Delta-baryon electromagnetic form factors in lattice QCD

enabling us to reach low momentum transfers and a lowest pion mass of about 400 MeV. In the unquenched theory we use two degenerate flavors of dynamical Wilson fermions on a lattice of spatial size 1.9 fm at

Quark transverse charge densities in the Delta(1232) from lattice QCD

\ensuremath{\beta}=5.6

Lattice study of pentaquark states

and lowest pion mass of about 380 MeV enabling comparison with the results obtained in the quenched theory. that unquenching effects are small for the pion masses considered in this work. We compare our lattice results to the isovector part of the experimentally measured form factors.

NtoΔelectromagnetic transition form factors from lattice QCD

We present results on the static three- and four-quark potentials in SU(3) and SU(4) respectively within quenched lattice QCD. We use an analytic multi-hit procedure for the time links and a variational approach to determine the ground state. The three- and four-quark potentials extracted are consistent with a sum of two-body potentials, possibly with a weak many-body component. The results give support to the

N-to-ΔAxial Transition Form Factors from Lattice QCD

\Delta

Free energy and plaquette expectation value for gluons on the lattice, in three dimensions

ansatz for the baryonic area law.

Determination of Δ-resonance parameters from lattice QCD

We develop techniques to calculate the four

Nucleon and Nucleon-to-Delta Axial Form Factors from Lattice QCD

\ensuremath{\Delta}