Nucleon to delta transition form factors with NF=2+1 domain wall fermions
Name
Alexandrou-2011-Nucleon to Delta tra.pdf
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Author(s)
Alexandrou, Constantia
Koutsou, Giannis
Negele, John W.
Proestos, Y.
Tsapalis, A.
Alternative Title
Nucleon to Δ transition form factors with NF=2+1 domain wall fermions
Date Issued
January 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
Alexandrou, C. et al. “Nucleon to Delta Transition Form Factors with NF=2+1 Domain Wall Fermions.” Physical Review D 83.1 (2011) : 014501. © 2011 The American Physical Society
Version
Final published version
Abstract
We calculate the electromagnetic, axial, and pseudoscalar form factors of the nucleon to Δ(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, REM and RSM, measured in experiment.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.83.014501
