A pentaquark picture of Λ(1405)
نویسنده
چکیده
We test a pentaquark model of the negative parity hyperon Λ(1405). We use a model where valence four quarks and one antiquark move in a potential relativistically and interact with each other and themselves through gluon and NG boson. Fall-apart decay rate of the system is studied and strong model dependence is pointed out.
منابع مشابه
ar X iv : n uc l - th / 0 60 20 72 v 1 2 7 Fe b 20 06 Study of Pentaquark and Λ ( 1405 )
We perform a five-body calculation for pentaquark (q 4 ¯ q) state of Λ(1405) as well as the three-body calculations for the ground state baryons and the Λ(1405), and two-body calculations for mesons. The hamiltonian, which reproduces reasonably well the energies of ground state baryons (N, Λ, Σ, Ξ and ∆) and mesons (π, K, ρ, K *), includes kinetic energy of semi-relativistic form, linear confin...
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متن کاملA Pentaquark Model of the Negative Parity Λ(1405)
We test a pentaquark model of the negative parity hyperon Λ(1405). We use the model where valence four quarks and one antiquark move in a potential relativisticaly and interact with themselves and each other through gluon and NG boson. We calculate mass shift of the system and find that there are two Λ(1405) with almost degenerate mass: one flavor singlet and one flavor octet. We calclate also ...
متن کاملΛ(1405) and Negative-Parity Baryons in Lattice QCD
We review briefly recent studies of the Λ(1405) spectrum in Lattice QCD. Ordinary three-quark pictures of the Λ(1405) in quenched Lattice QCD fail to reproduce the mass of the experimental value, which seems to support the penta-quark picture for the Λ(1405) such as a K̄N molecule-like state. It is also noted that the present results suffer from relatively large systematic uncertainties coming f...
متن کاملChiral Dynamics, Structure of Λ(1405), and K̄n Phenomenology
We investigate the structure of the Λ(1405) resonance and K̄N phenomenology in the perspective of chiral SU(3) dynamics. Utilizing the chiral coupled-channel approach which well describes the K̄N scattering observable, we perform three different analyses to clarify the structure of the Λ(1405) resonance. The results consistently indicate the meson-baryon molecule picture of the Λ(1405). We argue ...
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تاریخ انتشار 2008