86 citations
- National Technical University of AthensGR7 papers
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6 papers · 1 filter
Determination of Delta resonance parameters from lattice QCD
C. Alexandrou, J. W. Negele, M. Petschlies +2
A method suitable for extracting resonance parameters of unstable baryons in lattice QCD is examined. The method is applied to the strong decay of the Delta to a pion-nucleon state…
Determination of the axial and pseudoscalar form factors from lattice QCD
C. Alexandrou, E. B. Gregory, T. Korzec +4
We present a lattice QCD calculation of the matrix elements of the axial-vector and pseudoscalar currents. The decomposition of these matrix elements into the appropriate…
The axial charge and form factors from lattice QCD
C. Alexandrou, E. B. Gregory, T. Korzec +4
We present the first calculation on the axial-vector and pseudoscalar form factors using lattice QCD. Two Goldberger-Treiman relations are derived and examined. A combined chir…
Nucleon to Delta transition form factors with domain wall fermions
C. Alexandrou, G. Koutsou, J. W. Negele +2
We calculate the electromagnetic, axial and pseudo-scalar form factors of the Nucleon to transition using two dynamical light degenerate quarks and a dynamical strange qu…
N to Delta transition form factors with Nf=2+1 domain wall fermions
C. Alexandrou, G. Koutsou, J. W. Negele +3
The electromagnetic, axial and pseudoscalar nucleon to Delta form factors are calculated using dynamical domain wall fermions at a lattice spacing of a = 0.114 fm on a lattice of s…
Delta electromagnetic form factors and quark transverse charge densities from lattice QCD
C. Alexandrou, T. Korzec, G. Koutsou +5
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…