scholarly journals Energy-dependent dipole form factor in a QCD-inspired model

2016 ◽  
Vol 706 ◽  
pp. 052006 ◽  
Author(s):  
C.A.S. Bahia ◽  
M. Broilo ◽  
E.G.S. Luna
Keyword(s):  
Form Factor ◽  
Dipole Form Factor ◽  
Energy Dependent ◽  
Dipole Form ◽  
Qcd Inspired Model

scholarly journals Studying the Bound State of the BK¯ System in the Bethe-Salpeter Formalism

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Zhen-Yang Wang ◽  
Jing-Juan Qi ◽  
Xin-Heng Guo
Keyword(s):  
Form Factor ◽  
Form Factors ◽  
Bound State ◽  
Equation Approach ◽  
Dipole Form Factor ◽  
Instantaneous Approximation ◽  
Particle Exchange ◽  
Dipole Form

In this work, we study the BK¯ molecule in the Bethe-Salpeter (BS) equation approach. With the kernel containing one-particle-exchange diagrams and introducing two different form factors (monopole form factor and dipole form factor) in the vertex, we solve the BS equation numerically in the covariant instantaneous approximation. We investigate the isoscalar and isovector BK¯ systems, and we find that X5568 cannot be a BK¯ molecule.

scholarly journals The electric dipole form factor of the nucleon

2005 ◽  
Vol 605 (3-4) ◽  
pp. 273-278 ◽  
Author(s):  
W.H. Hockings ◽  
U. van Kolck
Keyword(s):  
Form Factor ◽  
Electric Dipole ◽  
Dipole Form Factor ◽  
Dipole Form

A combination of hadronic form factors for modeling the kaon photoproduction process γp → K+Λ

2015 ◽  
Vol 24 (02) ◽  
pp. 1550008 ◽  
Author(s):  
L. Syukurilla ◽  
T. Mart
Keyword(s):  
Experimental Data ◽  
Form Factor ◽  
Differential Cross Section ◽  
Cross Section ◽  
Form Factors ◽  
Coupling Constants ◽  
Dipole Form Factor ◽  
Photoproduction Process ◽  
Different Types ◽  
Dipole Form

We have phenomenologically investigated the kaon photoproduction process γp → K+Λ by combining different types of hadronic form factors (HFFs) inside a covariant isobar model. We obtained the best model with the smallest χ2/N by using the dipole form factor in the Born terms and a combination of the dipole, Gaussian, as well as generalized dipole form factors in the hadronic vertices of the nucleon, kaon and hyperon resonances. By utilizing this model we found that the experimental data used in the analysis are internally consistent, whereas the behavior of differential cross-section at forward angles is not significantly affected by the variation of hadronic coupling constants (CCs) and form factor cutoffs in the model.

Proton dipole form factor quark model

1996 ◽  
Vol 35 (12) ◽  
pp. 2443-2454 ◽  
Author(s):  
George L. Strobel
Keyword(s):  
Form Factor ◽  
Quark Model ◽  
Dipole Form Factor ◽  
Dipole Form

scholarly journals PHASE OF THE COULOMB AMPLITUDE IN THE SECOND BORN APPROXIMATION

1996 ◽  
Vol 11 (28) ◽  
pp. 2317-2323 ◽  
Author(s):  
O.V. SELYUGIN
Keyword(s):  
Form Factor ◽  
Born Approximation ◽  
Coulomb Phase ◽  
Dipole Form Factor ◽  
Total Phase ◽  
Hadron Form Factor ◽  
Coulomb Amplitude ◽  
Transfer Momentum ◽  
Dipole Form

The method of calculating the Coulomb phase in the second Born order with allowance for the hadron form factor is presented. The phase of the modified Coulomb amplitude can be calculated exactly by taking account of the form factor of hadrons. The phase with the dipole form factor is estimated; as a result, the behavior of the total phase of the Coulomb-hadron interference changes as a function of the transfer momentum.

The neutron electric dipole form factor in the perturbative chiral quark model

2006 ◽  
Vol 32 (4) ◽  
pp. 547-564 ◽  
Author(s):  
Claudio Dib ◽  
Amand Faessler ◽  
Thomas Gutsche ◽  
Sergey Kovalenko ◽  
Jan Kuckei ◽  
...  
Keyword(s):  
Form Factor ◽  
Quark Model ◽  
Electric Dipole ◽  
Chiral Quark Model ◽  
Dipole Form Factor ◽  
Dipole Form

scholarly journals Properties of the Inelastic Form Factors of the Nucleus

1978 ◽  
Vol 31 (1) ◽  
pp. 9 ◽  
Author(s):  
WK Koo ◽  
LJ Tassie
Keyword(s):  
Form Factor ◽  
Momentum Transfer ◽  
Inversion Formula ◽  
Sum Rules ◽  
Form Factors ◽  
Identity Operator ◽  
Weighted Sum ◽  
Giant Resonances ◽  
Dipole Form Factor ◽  
Dipole Form

Based on an inversion formula for the energy-weighted sum rules, a study is made of the properties of the inelastic form factors of the nucleus. The inversion formula is derived by using a simple representation of the identity operator for a restricted set of non-orthogonal states and it is applicable to both isoscalar and isovector transitions. As a result, it is shown that the longitudinal form factor for a particular multipolarity cannot be explicitly factorized into a product of a function of momentum transfer and a function of excitation energy over the entire range of momentum transfer. Further, the ambiguity arising out of the use of the hydrodynamical model to assign spins of giant resonances is illustrated, taking the isovector electric dipole form factor as an example.

scholarly journals The nucleon electric dipole form factor from dimension-six time-reversal violation

2011 ◽  
Vol 695 (1-4) ◽  
pp. 268-274 ◽  
Author(s):  
J. de Vries ◽  
E. Mereghetti ◽  
R.G.E. Timmermans ◽  
U. van Kolck
Keyword(s):  
Form Factor ◽  
Electric Dipole ◽  
Time Reversal ◽  
Dipole Form Factor ◽  
Dipole Form

scholarly journals Strong CP violation and the neutron electric dipole form factor

2007 ◽  
Vol 70 (2) ◽  
pp. 349-357 ◽  
Author(s):  
J. Kuckei ◽  
C. Dib ◽  
A. Faessler ◽  
T. Gutsche ◽  
S. G. Kovalenko ◽  
...  
Keyword(s):  
Form Factor ◽  
Cp Violation ◽  
Electric Dipole ◽  
Dipole Form Factor ◽  
Dipole Form

scholarly journals The electric dipole form factor of the nucleon in chiral perturbation theory to sub-leading order

2011 ◽  
Vol 696 (1-2) ◽  
pp. 97-102 ◽  
Author(s):  
E. Mereghetti ◽  
J. de Vries ◽  
W.H. Hockings ◽  
C.M. Maekawa ◽  
U. van Kolck
Keyword(s):  
Perturbation Theory ◽  
Form Factor ◽  
Chiral Perturbation Theory ◽  
Electric Dipole ◽  
Leading Order ◽  
Chiral Perturbation ◽  
Dipole Form Factor ◽  
Dipole Form
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