scholarly journals NUCLEON ELECTROMAGNETIC FORM FACTORS

2003 ◽  
Vol 12 (01) ◽  
pp. 1-40 ◽  
Author(s):  
HAIYAN GAO
Keyword(s):  
Degrees Of Freedom ◽  
Form Factors ◽  
Effective Field ◽  
Electromagnetic Form Factors ◽  
Electromagnetic Structure ◽  
Theoretical Progress ◽  
Polarized Target ◽  
Urgent Task ◽  
Unpolarized Electron ◽  
Made In

Nucleon electromagnetic form factors are fundamental quantities related to the charge and magnetization distributions inside the nucleon. Understanding the nucleon electromagnetic structure in terms of the underlying quark and gluon degrees of freedom of quantum chromodynamics is a challenging and urgent task. The nucleon electromagnetic form factors have been studied in the past extensively in unpolarized electron scattering experiments. With the development in polarized beam, recoil polarimetry, and polarized target technologies, polarization experiments have provided more precise data on these quantities. At the same time, significant theoretical progress in areas ranging from effective field theories to lattice QCD calculations, has been made in describing these data. In this article, we review recent experimental and theoretical progress on this subject. We also provide the future outlook on this topic.

scholarly journals NUCLEON ELECTROMAGNETIC FORM FACTORS

2005 ◽  
Vol 20 (08n09) ◽  
pp. 1595-1600 ◽  
Author(s):  
HAIYAN GAO
Keyword(s):  
Electron Scattering ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Precise Data ◽  
The Past ◽  
Polarized Target ◽  
Polarized Beam ◽  
Unpolarized Electron

The nucleon electromagnetic form factors have been studied in the past extensively from unpolarized electron scattering experiments. With the development in polarized beam, recoil polarimetry, and polarized target technologies, polarization experiments have provided more precise data on these quantities. In this talk, I review recent experimental progress on this subject.

scholarly journals Nucleon electromagnetic form factors on the lattice and in chiral effective field theory

2005 ◽  
Vol 71 (3) ◽  
Author(s):  
M. Göckeler ◽  
T. R. Hemmert ◽  
R. Horsley ◽  
D. Pleiter ◽  
P. E. L. Rakow ◽  
...  
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Form Factors ◽  
Effective Field ◽  
Electromagnetic Form Factors ◽  
Chiral Effective Field Theory

scholarly journals Nucleon Electromagnetic Structure from Lattice QCD

2020 ◽  
Vol 15 ◽  
pp. 31
Author(s):  
C. Alexandrou ◽  
G. Koutsou ◽  
H. Neff ◽  
J. W. Negele ◽  
W. Schroers ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Momentum Transfer ◽  
Magnetic Moment ◽  
Qualitative Agreement ◽  
Pion Mass ◽  
Form Factors ◽  
Effective Theory ◽  
Electromagnetic Form Factors ◽  
Electromagnetic Structure ◽  
Nucleon Magnetic Moment

We present an evaluation of nucleon to Δ electromagnetic form factors within Lattice QCD. The EMR and CMR ratios are calculated both in the quenched theory and using two degenerate flavors of dynamical Wilson fermions. We obtain values in qualitative agreement to experiment. In addition, we evaluate the isovector Sachs electromagnetic form factors of the nucleon both in the quenched and unquenched theory for momentum transfer squared in the range between 0.1 and 2 GeV2. The nucleon magnetic moment and r.m.s. radii are obtained using chiral effective theory to extrapolate to the physical pion mass.

scholarly journals EFFECTIVE FIELD THEORY OF THE SINGLE-NUCLEON SECTOR

2008 ◽  
Vol 23 (27n30) ◽  
pp. 2289-2292
Author(s):  
STEFAN SCHERER
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Form Factors ◽  
Effective Field ◽  
Chiral Expansion ◽  
Power Counting ◽  
Electromagnetic Form Factors ◽  
Nucleon Mass ◽  
Chiral Perturbation ◽  
Power Counting Scheme

We address the issue of a consistent power counting scheme in manifestly Lorentz-invariant baryon chiral perturbation theory. We discuss the inclusion of vector mesons in the calculation of the nucleon electromagnetic form factors. We comment on the chiral expansion of the nucleon mass to order [Formula: see text].

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