N*(1535)→N transition form-factors due to the axial current
نویسندگان
چکیده
منابع مشابه
Axial anomaly and transition form factors.
We investigate the properties of the amplitude induced by the anomaly. In a relatively high energy region those amplitudes are constructed by the vector meson poles and the anomaly terms, in which the anomaly terms can be essentially evaluated by the triangle quark graph. We pay our attention to the anomaly term and make intensive analysis of the existing experimental data, i.e., the electromag...
متن کاملNucleon Form Factors of the Isovector Axial - Vector Current
The theoretical and experimental status of the isovector axial-vector current form factors GA(q 2) and GP (q 2) of the nucleon is reviewed. We also describe a new calculation of these form factors in manifestly Lorentz-invariant chiral perturbation theory (ChPT) with the inclusion of axial-vector mesons as explicit degrees of freedom.
متن کاملChiral symmetry and the axial nucleon to ∆(1232) transition form factors
We study the momentum and the quark mass dependence of the axial nucleon to ∆ (1232) transition form factors in the framework of non-relativistic chiral effective field theory to leading-one-loop order. The outcome of our analysis provides a theoretical guidance for chiral extrapolations of lattice QCD results with dynamical fermions.
متن کاملMeasurement of the Axial Form Factors 13 Axial Singlet Currents &
The proton form factors are reduced to vacuum correlators of 4 quark elds by assuming independent constituent quarks. The axial singlet quark and glu-onic form factors are calculated in the instanton liquid model. A discussion of gauge(in)dependence is given.
متن کاملNucleon-to-Delta axial transition form factors in relativistic baryon chiral perturbation theory
We report a theoretical study of the axial Nucleon to Delta(1232) (N → ∆) transition form factors up to one-loop order in relativistic baryon chiral perturbation theory. We adopt a formalism in which the ∆ couplings obey the spin-3/2 gauge symmetry and, therefore, decouple the unphysical spin-1/2 fields. We compare the results with phenomenological form factors obtained from neutrino bubble cha...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2019
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.100.054030