Nucleon and Delta in a covariant quark-diquark model
Volker Keiner
Abstract
We develop a formally covariant quark-diquark model of the nucleon. The nucleon is treated as a bound state of a constituent quark and a diquark interacting via a quark exchange. We include both scalar and axial-vector diquarks. The underlying Bethe-Salpeter equation is transformed into a pair of coupled Salpeter equations. The space- and timelike electromagnetic form factors of the nucleon are calculated in the Mandelstam formalism for squared momentum transfers up to 3 (GeV/c)2 above threshold. The model is applied also to the Delta(3/2).
Create a lesson
Related papers
Parametrization of unitary matrices, parametrizing the symmetric S matrix and the NN S matrix above the inelastic threshold
N. A. Khokhlov
Thermofractal Dynamics in the Multisource Thermal Model: A Unified Approach to Multiparticle Production
Airton Deppman, Trambak Bhattacharyya, Maciej Rybczyński et al.
Electroweak Constraints on Nuclear Neutron Distributions and the Low-Energy Weak Mixing Angle
Xu-Run Huang, Tong-Gang Yue, Zhen Zhang et al.
Active-subspace learning reveals dominant parameter directions in nuclear observables
Tom Plies, Margarida Companys Franzke, Achim Schwenk
Shape coexisting intruder states in even Sn isotopes and their influence on the B4/2<1 anomaly
P. Buganu, R. Benjedi, R. Budaca
Light nucleus and hypernucleus production at RHIC and LHC energies: a comparative study of phenomenological models
J. Aichelin, A. Andronic, F. Bellini et al.