Masses and radiative decay widths of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>S</mml:mi></mml:mrow></mml:math>- and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>P</mml:mi></mml:mrow></mml:math>-wave singly, doubly, and triply heavy charm and bottom baryons

Abstract

We present a study of mass spectra and electromagnetic couplings of $S$- and $P$-wave baryons containing one, two or three heavy quarks, either charm ($c$) or bottom ($b$), in the framework of a nonrelativistic harmonic-oscillator quark model. A simultaneous fit to 41 known masses of heavy baryons (40 singly heavy and 1 doubly heavy) shows a rms deviation of 19 MeV. We present equal-spacing mass rules for excited baryons which may help to assign quantum numbers to experimentally observed heavy baryons. Explicit expressions are derived for electromagnetic couplings, both for spin-flavor matrix elements and radial integrals.

Topics & Concepts