Fully Heavy Tetraquark Spectroscopy in the Relativistic Quark Model

Fully relativistic quark models for heavy-light systems.

A fully relativistic quark model is constructed and applied to the study of wave-functions as well as the spectrum of heavy-light mesons. The free parameters of the model are a constituent quark mass and (on the lattice) an adjustable r-parameter in the fermionic kinetic energy, while the confinement is introduced via potentials measured by MonteCarlo. The results are compared to Monte Carlo en...

Relativistic Heavy Quark Effective Action

We study the fermion action needed to accurately describe the low energy physics of systems including heavy quarks in lattice QCD even when the heavy fermion mass m is on the order of, or larger than, the inverse lattice spacing: m ≥ 1/a. We carry out an expansion through first order in |~ p|a (where ~ p is the heavy quark momentum) and all orders in ma, refining the analysis of the Fermilab an...

Heavy Baryon Transitions in a Relativistic Three-Quark Model

Exclusive semileptonic decays of bottom and charm baryons are considered within a relativistic three-quark model with a Gaussian shape for the baryon-three-quark vertex and standard quark propagators. We calculate the baryonic Isgur-Wise functions, decay rates and asymmetry parameters. PACS: 12.39.Ki, 13.30.Ce, 14.20.Lq, 14.20.Mr

THE ROLE OF QUARK POLARIZATION IN HEAVY QUARK FRAGMENTATION

We calculate the exact fragmentation functions for c and b quark fragmentation taking into account the spin orientation of the initial heavy quark in the form of analytical and rather simple expressions. Our calculations show that spin orientation may have an important effect on the fragmentation spectrum. This effect is more striking in the cases of c ?D, D*; c? ? , ? , and ?B , B *.

Heavy Quark Spectroscopy and Decay