scholarly journals Nucleon and N-Delta Electromagnetic Transition Form Factors

2007 ◽  
Author(s):  
Franz Gross ◽  
G. Ramalho ◽  
M. T. Peña
Keyword(s):  
Form Factors ◽  
Transition Form ◽  
Electromagnetic Transition

scholarly journals Electromagnetic transition form factors of baryons in a relativistic Faddeev approach

2018 ◽  
Vol 181 ◽  
pp. 01013 ◽  
Author(s):  
Reinhard Alkofer ◽  
Christian S. Fischer ◽  
Hèlios Sanchis-Alepuz
Keyword(s):  
Ground State ◽  
Bound States ◽  
Body Wave ◽  
Form Factors ◽  
Wave Functions ◽  
Electromagnetic Form Factors ◽  
Transition Form ◽  
Electromagnetic Transition ◽  
Three Body ◽  
Gluon Interaction

The covariant Faddeev approach which describes baryons as relativistic three-quark bound states and is based on the Dyson-Schwinger and Bethe-Salpeter equations of QCD is briefly reviewed. All elements, including especially the baryons’ three-body-wave-functions, the quark propagators and the dressed quark-photon vertex, are calculated from a well-established approximation for the quark-gluon interaction. Selected previous results of this approach for the spectrum and elastic electromagnetic form factors of ground-state baryons and resonances are reported. The main focus of this talk is a presentation and discussion of results from a recent investigation of the electromagnetic transition form factors between ground-state octet and decuplet baryons as well as the octet-only Σ0 to Λ transition.

scholarly journals Nucleon-to-Roper electromagnetic transition form factors at large Q2

2019 ◽  
Vol 99 (3) ◽  
Author(s):  
Chen Chen ◽  
Ya Lu ◽  
Daniele Binosi ◽  
Craig D. Roberts ◽  
Jose Rodríguez-Quintero ◽  
...  
Keyword(s):  
Form Factors ◽  
Transition Form ◽  
Electromagnetic Transition

scholarly journals Electromagnetic Transition Form Factors and Dilepton Decay Rates of Nucleon Resonances

2002 ◽  
Vol 296 (2) ◽  
pp. 299-346 ◽  
Author(s):  
M.I. Krivoruchenko ◽  
B.V. Martemyanov ◽  
Amand Faessler ◽  
C. Fuchs
Keyword(s):  
Form Factors ◽  
Decay Rates ◽  
Transition Form ◽  
Electromagnetic Transition ◽  
Nucleon Resonances

INFRARED RENORMALON EFFECTS ON LIGHT MESONS ELECTROMAGNETIC TRANSITION FORM FACTOR FMγ*(Q2, ω)

2003 ◽  
Vol 18 (07) ◽  
pp. 1023-1050 ◽  
Author(s):  
YEGANA V. MAMEDOVA
Keyword(s):  
Form Factor ◽  
Perturbative Qcd ◽  
Transition Form Factor ◽  
Form Factors ◽  
Transition Form ◽  
Coupling Constant ◽  
Electromagnetic Transition ◽  
Qcd Factorization ◽  
Factorization Formula ◽  
Light Mesons

The light pseudoscalar π0, η and η′ mesons electromagnetic transition γ* + γ* → M form factors FMγ*(Q2,ω) are calculated, applying the perturbative QCD factorization formula and the frozen coupling constant approximation. In the computations the O(αS) order expression for FMγ*(Q2,ω) and the mesons' infrared renormalon corrected distribution amplitudes are used. In the case of the η and η′ mesons, the SUf(3) ordinary octet-singlet mixing scheme is utilized. Comparisons are made with the results obtained, employing the mesons' ordinary distribution amplitudes and with γ + γ* → M transition form factors.

scholarly journals Study of the electromagnetic transition form-factors in η→μ+μ−γ and ω→μ+μ−π0 decays with NA60

2009 ◽  
Vol 677 (5) ◽  
pp. 260-266 ◽  
Author(s):  
R. Arnaldi ◽  
K. Banicz ◽  
J. Castor ◽  
B. Chaurand ◽  
C. Cicalò ◽  
...  
Keyword(s):  
Form Factors ◽  
Transition Form ◽  
Electromagnetic Transition

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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