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| Hauptseite > Externe Publikationen > Vita Publikationen > N to Δ electromagnetic transition form factors from lattice QCD |
| Hauptseite > Externe Publikationen > Vita Publikationen > N to Δ electromagnetic transition form factors from lattice QCD |
| Journal Article | FZJ-2019-01105 |
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2004
Inst.812068
Melville, NY
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Please use a persistent id in citations: doi:10.1103/PhysRevD.69.114506
Abstract: The magnetic dipole, the electric quadrupole, and the Coulomb quadrupole amplitudes for the transition γ→NΔ are evaluated both in quenched lattice QCD at β=6.0 and using two dynamical Wilson fermions simulated at β=5.6. The dipole transition form factor is accurately determined at several values of momentum transfer. On the lattices studied in this work, the electric quadrupole amplitude is found to be nonzero, yielding a negative value for the ratio REM of electric quadrupole to magnetic dipole amplitudes at three values of momentum transfer.
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