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.

arXiv commentUpdated section on doubly strange diquarks

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• Bottom baryons from a dynamical lattice QCD simulation
• Light cone QCD sum rules study of the semileptonic heavy ${\Xi }_Q$ and ${\Xi }_Q^{\prime }$ transitions to $\Xi$ and $\Sigma$ baryons
• Isospin splittings in baryons with two heavy quarks
• Magnetic Moments of Bottom Baryons: Effective mass and Screened Charge
• Feasibility of measuring the magnetic dipole moments of the charm baryons at the LHC using bent crystals
• Measurement of the Spin of the Xi(1530) Resonance
• Prospects for observing the lowest-lying odd-parity ${\Sigma }_c$ and ${\Sigma }_b$ baryons
• Measurement of the masses and widths of the bottom baryons Sigma_b+- and Sigma_b*+-
• The prospect of charm quark magnetic moment determination
• The strong ${\Lambda }_{b}NB$ and ${\Lambda }_{c}ND$ vertices
• 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
• Strong couplings of negative and positive parity nucleons to the heavy baryons and mesons
• Predictions for masses of Xi_b baryons
• Predictions for masses of bottom baryons
• Analysis of the strong coupling form factors of ${\Sigma }_{b}NB$ and ${\Sigma }_{c}ND$ in QCD sum rules
• The electromagnetic form factors of ${\Lambda }_c$ hyperon in the vector meson dominance model
• Heavy Baryons and Exotics Spectrum
• The $g_{{\Sigma }_Q{\Sigma }_Q\pi }$ Coupling Constant via Light Cone QCD Sum Rules
• Analysis of the strong vertices of ${\Sigma }_{c}N{D}^{\ast }$ and ${\Sigma }_{b}N{B}^{\ast }$ in QCD sum rules
• Analysis of the vertexes ${\Omega }_Q^{\ast }{\Omega }_Q^{\ast }\varphi$, ${\Omega }_Q^{\ast }{\Xi }_Q^{\ast }{K}^{\ast }$, ${\Xi }_Q^{\ast }{\Sigma }_Q^{\ast }{K}^{\ast }$ and ${\Sigma }_Q^{\ast }{\Sigma }_Q^{\ast }\rho$ with the light-cone QCD sum rules
• Analysis of the strong vertexes of ${\Sigma }_c^{\ast }ND$ and ${\Sigma }_b^{\ast }NB$ in QCD sum rules