Multipole expansion of conserved tensor currents and the number of form factors

1990 ◽  
Vol 41 (6) ◽  
pp. 1989-2002 ◽  
Author(s):  
V. Rahal ◽  
H. C. Ren
Keyword(s):  
Form Factors ◽  
Multipole Expansion

scholarly journals Multipole expansion for the electron-nucleus scattering at high energies in the unified electroweak theory

2014 ◽  
Vol 4 (4) ◽  
pp. 38-44
Author(s):  
Zuyen Phu Luong ◽  
Huu Ha Nguyen
Keyword(s):  
Cross Section ◽  
Weak Interactions ◽  
Form Factors ◽  
Multipole Expansion ◽  
Electromagnetic Form Factors ◽  
Electroweak Theory ◽  
High Energies ◽  
Nucleus Scattering ◽  
Partial Form ◽  
Definite Angular Momentum

The article presents the multipole expansion for the electron-nucleus scattering cross-section at high energies within framework of the unified electroweak theory. The electroweak currents of  the nucleus is expanded into simple components with definite angular momentum, which are called the multipole form factors. The multipole expansion of the cross-section is a consequence of the above expansion. Besides the familiar electromagnetic form factors FxL , there are new form factors VLX and ALX related to weak interactions, corresponding to the vector and axial weak currents. The obtained general expressions are applied to the nucleus 36Li , where the partial form factors are computed in the multiparticle shell model.

scholarly journals Mag2Pol: a program for the analysis of spherical neutron polarimetry, flipping ratio and integrated intensity data

2019 ◽  
Vol 52 (1) ◽  
pp. 175-185 ◽  
Author(s):  
Navid Qureshi
Keyword(s):  
Magnetic Structure ◽  
Magnetic Domain ◽  
Form Factors ◽  
Multipole Expansion ◽  
Intensity Data ◽  
Data Set ◽  
Neutron Polarimetry ◽  
Least Squares Fit ◽  
Magnetization Density ◽  
Integrated Intensity

Mag2Pol is a graphical user interface program which is devoted to the treatment of data from polarized neutron diffractometers with spherical polarization analysis. Nuclear and magnetic structure models can be introduced using space-group symbols and individual symmetry operators, respectively, and viewed in an OpenGL widget. The program calculates nuclear/magnetic structure factors, flipping ratios and polarization matrices for magnetic Bragg reflections, taking into account structural twins and magnetic domains. Spherical neutron polarimetry data can be analyzed by refining a magnetic structure model including magnetic domain populations in a least-squares fit and can also be correlated with an integrated intensity data set in a joint refinement. Further features are the simultaneous refinement of nuclear and magnetic structures with integrated intensity data and the analysis of flipping ratios either with tabulated magnetic form factors or using a multipole expansion of the magnetization density.

scholarly journals Gravitational form factors of a baryon with spin-3/2

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
June-Young Kim ◽  
Bao-Dong Sun
Keyword(s):  
Energy Momentum Tensor ◽  
Form Factors ◽  
Multipole Expansion ◽  
Momentum Tensor ◽  
Skyrme Model ◽  
Model Based ◽  
General Relations

AbstractThe energy–momentum tensor (EMT) for a spin-3/2 baryon is related to seven mechanical quantities. In this work, we provide the general form of the gravitational form factors (GFFs) for a spin-3/2 baryon by using the multipole expansion and interesting relations between the EMT densities and the GFFs. To verify those general relations, we study the nucleon and the $$\Delta $$ Δ GFFs within the SU(2) Skyrme model based on the large $$N_{c}$$ N c limit.

THE STRUCTURE OF 6Li AND ITS COULOMB FORM FACTORS

1971 ◽  
Vol 32 (C5) ◽  
pp. C5b-269-C5b-270
Author(s):  
Kuniharu Kubodera
Keyword(s):  
Form Factors

Reciprocal Polarizable Embedding with a Transferable H2O Potential Function I: Formulation & Tests on Dimer

2019 ◽  
Author(s):  
Elvar Jónsson ◽  
Asmus Ougaard Dohn ◽  
Hannes Jonsson
Keyword(s):  
Potential Function ◽  
Dft Method ◽  
Multipole Expansion ◽  
Energy Functional ◽  
Real Space ◽  
Functional Formulation ◽  
General Energy ◽  
Projector Augmented Wave ◽  
Grid Based ◽  
Polarizable Embedding

This work describes a general energy functional formulation of a polarizable embedding QM/MM scheme, as well as an implementation where a real-space Grid-based Projector Augmented Wave (GPAW) DFT method is coupled with a potential function for H<sub>2</sub>O based on a Single Center Multipole Expansion (SCME) of the electrostatics, including anisotropic dipole and quadrupole polarizability.

Elastic Longitudinal Electron Scattering form Factors of 9Be

2011 ◽  
Vol 14 (2) ◽  
pp. 116-122 ◽  
Author(s):  
R.A. Radhi ◽  
◽  
N.M. Adeeb ◽  
A.K. Hashim ◽  
◽  
...  
Keyword(s):  
Electron Scattering ◽  
Form Factors
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