Nucleon toΔtransition form factors withNF=2+1domain wall fermions

2010/11/14 by C. Alexandrou, Constantia Alexandrou, G. Koutsou +6 · 2 citations
Physics and Astronomy · #Atomic physics #High-Energy Particle Collisions Research #Lattice (music) #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Pseudoscalar #Quadrupole #Quantum Chromodynamics and Particle Interactions #Quark #hep-lat #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevd.83.014501

published as Phys.Rev.D83:014501,2011 · 31 pages, 10 figures

arxiv created 2010/11/14 · openalex publication_date 2011/01/05 · arxiv updated 2011/02/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We calculate the electromagnetic, axial, and pseudoscalar form factors of the nucleon to \ensuremathΔ(1232) transition using two dynamical light degenerate quarks and a dynamical strange quark simulated with the domain wall fermion action. Results are obtained at lattice spacings a=0.114 fm and a=0.084 fm, with corresponding pion masses of 330 MeV and 297 MeV, respectively. High statistics measurements are achieved by utilizing the coherent sink technique. The dominant electromagnetic dipole form factor, the axial form factors and the pseudoscalar coupling are extracted to a good accuracy. This allows the investigation of the nondiagonal Goldberger-Treiman relation. Particular emphasis is given on the extraction of the subdominant electromagnetic quadrupole form factors and their ratio to the dominant dipole form factor, R_EM and R_SM, measured in experiment.

Citations

• Induced pseudoscalar coupling of the proton weak interaction
• Baryon structure from Lattice QCD
• Nucleon electromagnetic form factors from lattice QCD
• Nucleon to delta electromagnetic transition form factors in lattice QCD
• Nucleon Axial Charge in Full Lattice QCD
• The Chroma Software System for Lattice QCD
• Nucleon form factors with2+1flavor dynamical domain-wall fermions
• Two-photon exchange contribution to elastic electron-nucleonscattering at large momentum transfer
• N−Δ(1232)axial form factors from weak pion production
• Nucleon electromagnetic form factors
• N-to-ΔAxial Transition Form Factors from Lattice QCD

Cited by

• Electromagnetic transition form factors, E2/M1 and C2/M1 ratios of the baryon decuplet
• Hidden dibaryons in one- and two-pion production in NN collisions