Determining Pentaquark Quantum Numbers from Strong Decays

Abstract

Assuming that the recently observed ${\Theta }^{+}$ and ${\Xi }^{--}$ are members of an anti-decuplet of SU(3), decays to ground state baryons and mesons are calculated using an effective Lagrangian which incorporates chiral and SU(3) symmetry. We consider the possible quantum number assignments $J^{\Pi }={1/2}^{\pm },{3/2}^{\pm }$ and calculate ratios of partial widths. The branching ratios of exotic cascades can be used to discriminate between even and odd parity pentaquarks.

9 pages, references added, accepted for publication in PLB

References in corpus (9)

• Pentaquark hadrons from lattice QCD
• K+ nucleon scattering and exotic S=+1 Baryons
• Understanding Pentaquark States in QCD
• Interpretation of the Theta+ as an isotensor pentaquark with weakly decaying partners
• Phenomenology of the Pentaquark Antidecuplet
• Influence of a Z+(1540) resonance on K+N scattering
• Are ${\Theta }^{+}$ and the Roper resonance diquark-diquark-antiquark states?
• ${\Theta }^{+}$ in a chiral constituent quark model and its interpolating fields
• Positive Parity Pentaquarks Pragmatically Predicted

Cited by in corpus (10)

• Pentaquark Decay Width in QCD Sum Rules
• Negative parity pentaquarks in large Nc QCD and quark model
• Light-Front Approach for Pentaquark Strong Decays
• Heavy and Light Pentaquark Chiral Lagrangian
• Production of the pentaquark ${\Theta }^{+}$ in $np$ scattering
• Photoproduction and Radiative Decay of Spin 1/2 and 3/2 Pentaquarks
• Stable Pentaquarks from Strange Chiral Multiplets
• Positive parity pentaquark towers in large Nc QCD
• Pentaquark Masses in Chiral Perturbation Theory
• Heavy Pentaquarks in the Diquark Model and the Large N_c Expansion