منابع مشابه
The Axial Form Factor of the Nucleon
The parity violation programs at MIT-Bates, Jefferson Lab and Mainz are presently focused on developing a better understanding of the sea-quark contributions to the vector matrix elements of nucleon structure. The success of these programs will allow precise semi-leptonic tests of the Standard Model such as that planned by the QWeak collaboration. In order to determine the vector matrix element...
متن کاملSkyrme-model πNN form factor and nucleon-nucleon interaction
We apply the strong πNN form factor, which emerges from the Skyrme model, in the two-nucleon system using a one-boson-exchange (OBE) model for the nucleon-nucleon (NN) interaction. Deuteron properties and phase parameters of NN scattering are reproduced well. In contrast to the form factor of monopole shape that is traditionally used in OBE models, the Skyrme form factor leaves low momentum tra...
متن کاملNucleon axial form factor from lattice QCD.
Results for the isovector axial form factors of the proton from a lattice QCD calculation are presented for both point-split and local currents. They are obtained on a quenched 163 × 24 lattice at β = 6.0 with Wilson fermions for a range of quark masses from strange to charm. For each quark mass, we find that the axial form factor falls off slower than the corresponding proton electric form fac...
متن کاملIsospin violation in the vector form factors of the nucleon
A quantitative understanding of isospin violation is an increasingly important ingredient for the extraction of the nucleon’s strange vector form factors from experimental data. We calculate the isospin violating electric and magnetic form factors in chiral perturbation theory to leading and nextto-leading order respectively, and we extract the low-energy constants from resonance saturation. Un...
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 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: Progress of Theoretical Physics
سال: 1966
ISSN: 0033-068X
DOI: 10.1143/ptp.35.174