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 Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass

2014 ◽  
Vol 90 (7) ◽  
Author(s):  
J. R. Green ◽  
J. W. Negele ◽  
A. V. Pochinsky ◽  
S. N. Syritsyn ◽  
M. Engelhardt ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Physical Pion

Nucleon electromagnetic form factors from lattice QCD

2004 ◽  
pp. 9-14
Author(s):  
J. D. Ashley ◽  
D. B. Leinweber ◽  
A. W. Thomas ◽  
R. D. Young
Keyword(s):  
Lattice Qcd ◽  
Form Factors ◽  
Electromagnetic Form Factors

scholarly journals Strange nucleon electromagnetic form factors from lattice QCD

2018 ◽  
Vol 97 (9) ◽  
Author(s):  
C. Alexandrou ◽  
M. Constantinou ◽  
K. Hadjiyiannakou ◽  
K. Jansen ◽  
C. Kallidonis ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Form Factors ◽  
Electromagnetic Form Factors

scholarly journals Nucleon Axial and Electromagnetic Form Factors

2018 ◽  
Vol 175 ◽  
pp. 06033 ◽  
Author(s):  
Yong-Chull Jang ◽  
Tanmoy Bhattacharya ◽  
Rajan Gupta ◽  
Huey-Wen Lin ◽  
Boram Yoon
Keyword(s):  
Excited States ◽  
Finite Volume ◽  
Magnetic Moment ◽  
Lattice Spacing ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Charge Radii ◽  
Model Independent ◽  
Magnetic Form Factors

We present results for the isovector axial, induced pseudoscalar, electric, and magnetic form factors of the nucleon. The calculations were done using 2 + 1 + 1-flavor HISQ ensembles generated by the MILC collaboration with lattice spacings a ≈ 0.12, 0.09, 0.06 fm and pion masses Mπ ≈ 310, 220, 130 MeV. Excited-states contamination is controlled by using four-state fits to two-point correlators and by comparing two-versus three-states in three-point correlators. The Q2 behavior is analyzed using the model independent z-expansion and the dipole ansatz. Final results for the charge radii and magnetic moment are obtained using a simultaneous fit in Mπ, lattice spacing a and finite volume.

scholarly journals Hadron spin and external fields

2015 ◽  
Vol 39 ◽  
pp. 1560083 ◽  
Author(s):  
O. V. Teryaev
Keyword(s):  
Electromagnetic Field ◽  
Vector Meson ◽  
Lattice Qcd ◽  
Magnetic Moment ◽  
Equivalence Principle ◽  
Spin Structure ◽  
Form Factors ◽  
External Fields ◽  
Effective Gravity ◽  
Electroweak Boson

The interactions of hadron spin with gravity and electromagnetic field and their implication for hadron spin structure are considered. The extension of equivalence principle naturally leads to the closeness of vector meson magnetic moment to that of electroweak boson. This similarity is confirmed in the lattice QCD. The effective gravity in AdS/QCD allows to connect the [Formula: see text]-dependence of GPDs (and therefore electromagnetic and gravitational form factors) with [Formula: see text]-dependemce of TMDs. The possible cosmological implications of equivalence principle extension are discussed.

scholarly journals Nucleon electromagnetic form factors from lattice QCD

2004 ◽  
Vol 19 (S1) ◽  
pp. 9-14 ◽  
Author(s):  
J.D. Ashley ◽  
D.B. Leinweber ◽  
A.W. Thomas ◽  
R.D. Young
Keyword(s):  
Lattice Qcd ◽  
Form Factors ◽  
Electromagnetic Form Factors

scholarly journals Electromagnetic transition form factors, E2/M1 and C2/M1 ratios of the baryon decuplet

2020 ◽  
Vol 80 (11) ◽  
Author(s):  
June-Young Kim ◽  
Hyun-Chul Kim
Keyword(s):  
Lattice Qcd ◽  
Empirical Data ◽  
Pion Mass ◽  
Form Factors ◽  
The Self ◽  
Transition Form ◽  
Lattice Data ◽  
Electromagnetic Transition ◽  
Self Consistent ◽  
Good Agreement

AbstractWe investigate the electromagnetic transition form factors of the baryon decuplet to the baryon octet, based on the self-consistent SU(3) chiral quark-soliton model, taking into account the effects of explicit breaking of flavor SU(3) symmetry. We emphasize the $$Q^2$$ Q 2 dependence of the electromagnetic $$N\rightarrow \Delta $$ N → Δ transition form factors and the ratios of E2/M1 and C2/M1 in comparison with the experimental and empirical data. In order to compare the present results of the electromagnetic transition form factors of the $$N\rightarrow \Delta $$ N → Δ with those from lattice QCD, we evaluate the form factors with the pion mass deviated from its physical value. The results of the E2/M1 and C2/M1 ratios are in good agreement with the lattice data. We also present the results of the electromagnetic transition form factors for the decuplet to the octet transitions.

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