The New Sigma_b multiplet, heavy baryon mass predictions, meson-baryon universality and magnetic moments of Lambda_c and Lambda_b

Abstract

The recent measurement by CDF M(Sigma_b)-M(Lambda_b)=192 MeV is in striking agreement with our theoretical prediction M(Sigma_b)-M(Lambda_b) = 194 MeV. In addition, the measured splitting M(Sigma_b*)-M(Sigma_b) = 21 MeV agrees well with the predicted splitting of 22 MeV. We point out the connection between these predictions and an effective supersymmetry between mesons and baryons related by replacing a light antiquark by a light diquark. We discuss the theoretical framework behind these predictions and use it to provide additional predictions for the masses of spin-1/2 and spin-3/2 baryons containing heavy quarks, as well as magnetic moments of Lambda_b and Lambda_c.

Updated section on doubly strange diquarks

References in corpus (4)

• Evidence for diquarks in lattice QCD
• Direct observation of the strange b baryon Xi_b^{-}
• The Constituent Quark Model Revisited - Quark Masses, New Predictions for Hadron Masses and KN Pentaquark
• New Quark Relations for Hadron Masses and Magnetic Moments - A Challenge for Explanation from QCD

Cited by in corpus (6)

• Heavy Baryons in a Quark Model
• Bottom baryons from a dynamical lattice QCD simulation
• Heavy quark spectroscopy and prediction of bottom baryon masses
• Charm and bottom baryon masses in the combined $1/N_c$ and $1/m_Q$ expansion versus quark model
• Predictions for masses of Xi_b baryons
• Predictions for masses of bottom baryons