$\gamma N \to \Delta$ transition form factors in Quenched and $N_F=2$ QCD
C. Alexandrou (Univ. of Cyprus), Ph. de Forcrand (CERN & ETH Zurich),, Th. Lippert (Univ. of Wuppertal), H. Neff (Univ. of Athens, Boston Univ.),, J. W. Negele (MIT), K. Schilling (Univ. of Wuppertal), W. Schroers (MIT), A., Tsapalis (Univ. of Cyprus)
TL;DR
This paper presents calculations of the $\gamma N o \Delta$ transition form factors in both quenched and unquenched (with two dynamical quark flavors) QCD, providing insights into the electromagnetic properties of nucleon to delta transitions.
Contribution
It introduces a comparative analysis of $\gamma N o \Delta$ transition form factors in quenched and unquenched QCD, highlighting the effects of dynamical quarks on these amplitudes.
Findings
Magnetic dipole, electric quadrupole, and Coulomb quadrupole amplitudes calculated
Comparison between quenched and unquenched results shows differences in form factors
Results contribute to understanding nucleon to delta transition dynamics
Abstract
Calculations of the magnetic dipole, electric quadrupole and Coulomb quadrupole amplitudes for the transition are presented both in quenched QCD and with two flavours of degenerate dynamical quarks.
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