From atoms to nuclei, quarks and bejond...

Latest Results for Few-Body Systems

• Quark Mass Functions and Pion Structure in the Covariant Spectator Theory

  Abstract

  The Covariant Spectator Theory is applied to the description of quarks and the pion. The dressed quark mass function is calculated dynamically in Minkowski space and used in the calculation of the pion electromagnetic form factor. The effects of the mass function on the pion form factor and the different quark-pole contributions to the triangle diagram are analyzed.

• Valence-Quark Structure of N* Resonances from DSEs

  Abstract

  A unified Quantum Chromodynamics (QCD)-based description of elastic and transition electromagnetic form factors involving the nucleon and its resonances is presented. We use two different frameworks based on the QCD’s Dyson–Schwinger Equations formulation: one in which the Faddeev equation kernel and interaction vertices possess QCD-like momentum dependence and the other one based on a confining, symmetry-preserving treatment of a vector \(\,\otimes \,\) vector contact-interaction. The comparison between both frameworks explains that the contact-interaction formalism produces hard form factors, curtails some quark orbital angular momentum correlations within a baryon, and suppresses two-loop diagrams in the elastic and transition electromagnetic currents. Such defects are rectified in our QCD-based approach.

• Ground and Excited State Masses of the $$\varOmega _\textit{bbc}$$ Ω bbc Baryon

  Abstract

  In this paper, we will discuss the triply heavy baryon \(\varOmega _\textit{bbc}\) . This baryon is experimentally unknown till the date. We use hypercentral constituent quark model with Coulomb plus linear potential along with (1/m) correction to it. We extract the masses from S state to F state and present them with all iso-spin splittings. We also plot the Regge trajectories and determined slope and intercepts. Ground state magnetic moments are also calculated.