scholarly journals Covariant model for Dalitz decays of decuplet baryons to octet baryons

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
G. Ramalho
Keyword(s):  
Covariant Model ◽  
Octet Baryons

scholarly journals Quark sea asymmetries of the octet baryons

2010 ◽  
Vol 81 (11) ◽  
Author(s):  
Neetika Sharma ◽  
Harleen Dahiya
Keyword(s):  
Octet Baryons

scholarly journals Electric form factors of the octet baryons from lattice QCD and chiral extrapolation

2014 ◽  
Vol 90 (3) ◽  
Author(s):  
P. E. Shanahan ◽  
R. Horsley ◽  
Y. Nakamura ◽  
D. Pleiter ◽  
P. E. L. Rakow ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Form Factors ◽  
Chiral Extrapolation ◽  
Octet Baryons

Magnetic moments of the proton and of octet baryons in a quasiparticle diquark model

2010 ◽  
Vol 81 (1) ◽  
Author(s):  
A. Bhattacharya ◽  
A. Sagari ◽  
B. Chakrabarti ◽  
S. Mani
Keyword(s):  
Magnetic Moments ◽  
Diquark Model ◽  
Octet Baryons

scholarly journals Quark distributions of octet baryons from SU(3) symmetry

2002 ◽  
Vol 65 (3) ◽  
Author(s):  
Bo-Qiang Ma ◽  
Ivan Schmidt ◽  
Jacques Soffer ◽  
Jian-Jun Yang
Keyword(s):  
Octet Baryons

scholarly journals Studying time-like electromagnetic baryonic transitions with HADES in pion induced reactions

2020 ◽  
Vol 241 ◽  
pp. 01012
Author(s):  
Béatrice Ramstein
Keyword(s):  
Center Of Mass ◽  
Quantitative Description ◽  
Form Factors ◽  
Resonance Region ◽  
Partial Wave Analysis ◽  
Real Photon ◽  
Pion Beam ◽  
Dalitz Decay ◽  
Covariant Model ◽  
Proton Induced Reactions

A dedicated programme aiming at studying electromagnetic baryonic transitions in the time-like region has started at GSI using the pion beam and the High Acceptance Di-Electron Spectrometer (HADES) set-up. A pioneering experiment has been carried out in the second resonance region, at a center-of-mass energy of 1.49 GeV, using carbon and polyethylene targets, allowing for an analysis of the inclusive e+e- production and of the exclusive quasi-free π-p → ne+e- reaction, in complement to hadronic channels. Predictions for the Dalitz decay of N(1520) and N(1535) based on real photon couplings strongly underestimate the e+e- yield at invariant masses larger than 300 MeV/c2, which signals effects of time-like baryon transition form factors, in qualitative agreement with the Vector Dominance Models (VDM). A quantitative description of the observed e+e- yield is achieved by taking into account the contribution from off-shell ρs. The latter was provided by the preliminary results of a Bonn-Gatchina Partial Wave Analysis of the two-pion production channels, which were measured simultaneously in our experiment. A good agreement is also obtained using a covariant model for the time-like electromagnetic form factors for the N-N(1520) transition. The angular distributions for the e+e- production contain additional selective information on the spin structure of the different transitions. The measurements with the pion beam will be extended in future in the third resonance region. Hyperon Dalitz decay studies in proton induced reactions are also foreseen.

scholarly journals A covariant model for the γ∗N→N∗(1520) reaction

2014 ◽  
Vol 73 ◽  
pp. 04018
Author(s):  
G. Ramalho ◽  
M.T. Peña
Keyword(s):  
Covariant Model
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