Exotic baryons and the large-Nc expansion

Abstract

The status of exotic baryons is analyzed in the limit of a large number of colors Nc. Several toy models reproducing the main features of the large-Nc QCD are studied in order to clarify the recent controversy concerning the consistency of various approaches to the 1/Nc-expansion for exotic baryons. The analysis reveals several difficulties of the rigid-rotator approximation including the problems of this approximation in the description of exotic baryons.

28 pages

References in corpus (7)

• Observation of an Exotic $S=+1$ Baryon in Exclusive Photoproduction from the Deuteron
• Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• Pentaquark in the Skyrme Model
• Chiral soliton models, large N_c consistency and the Theta^+ exotic baryon
• Partners of the Theta^+ in Large N_c QCD
• Exotic baryon multiplets at large number of colours
• Excited Baryon Decay Widths in Large N_c QCD

Cited by in corpus (21)

• Chiral-Soliton Predictions for Exotic Baryons
• Z^* Resonances: Phenomenology and Models
• On the Existence of Heavy Pentaquarks: The large Nc and Heavy Quark Limits and Beyond
• Baryon Exotics in the Quark Model, the Skyrme Model and QCD
• Estimate of the Theta+ width in the Relativistic Mean Field Approximation
• The theta^+ baryon in soliton models: large Nc QCD and the validity of rigid-rotor quantization
• Pentaquarks: Review on Models and Solitonic Calculations of Antidecuplet Magnetic Moments
• 1/N Expansion for Exotic Baryons
• A theory of baryon resonances at large N_c
• Axial-vector transitions and strong decays of the baryon antidecuplet in the self-consistent SU(3) chiral quark-soliton model
• Vector transition form factors of the $N{K}^{\ast }\to {\Theta }^{+}$ and $N{\bar{K}}^{\ast }\to {\Sigma }_{\overline{10}}^{\ast -}$ in the SU(3) chiral quark-soliton model
• Phenomenological constraints on the Jaffe-Wilczek model of pentaquarks
• The collective quantization of three-flavored Skyrmions revisited
• Baryon Spectrum in Large N(C) Chiral Soliton and in Quark Models
• SU(3) constraints on cryptoexotic pentaquarks
• The quantization of exotic states in SU(3) soliton models: A solvable quantum mechanical analog
• The Chiral Soliton Model for Arbitrary Colors and Flavors
• Electric properties of the baryon anti-decuplet in the SU(3) chiral quark-soliton model
• Heavy baryon decay widths in the large $N_c$ limit in chiral theory
• Three-Body $B_{(s)}^0$ to $\varphi {\pi }^{+}{\pi }^{-}$ Decays
• Baryon distribution amplitude: Large-Nc factorization, spin-flavor symmetry and soft-pion theorem