Relativistic description of heavy baryons

Abstract

The masses of the ground state heavy baryons consisting of two light (u, d, s) and one heavy (c, b) quarks are calculated in the heavy-quark-light-diquark approximation within the constituent quark model. The light quarks, forming the diquark, and the light diquark in the baryon are treated completely relativistically. The expansion in v/c up to the second order is used only for the heavy (b and c) quarks. The diquark-gluon interaction is taken modified by the form factor describing the light diquark structure in terms of the diquark wave functions. An overall reasonable agreement of the obtained predictions with available experimental data and previous theoretical results is found.

Hadronic Physics and Exotics

“…It is worth testing and extending the q[qq] 3 * proposal by considering its implications for doubly heavy (QQq) baryons. The comparison with heavy-light (Q q) mesons offers a chance to calibrate the attractive forces in the 3 * and color-singlet channels [26,27]. Similarly, extending studies of the systematics of qq • q q states to Qq • Q q states should, over the long term, develop and challenge the way we think about diquarks.…”