Stochastic Variational Method Applied to Pentaquarks(Pentaquarks and related topics, Exotic hadrons, New Frontiers in QCD-Exotic Hadrons and Hadronic Matter-)

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概要

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• We perform a five-body calculation for pentaquark (q^4q) 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. We take two kinds of hamiltonian ; One includes non-relativistic kinetic energy and the other has the semi-relativistic form. Both hamiltonians reproduce reasonably well the energies of ground state baryons (N, Λ, Σ, Ξ and Δ) and mesons (π, K, ρ, K^*). Flavor symmetry breaking (m_s>m_<u, d>) is taken into account. The energy calculated for (q^4q) state of Λ(1405) is lower than the energy for the (q^3) state, even after eliminating the contribution from the color van der Waals force due to the phenomenological linear confinement potential. The present result suggests that the Λ(1405) is a pentaquark-dominated state if the color-magnetic potential plays a leading role of the quark-quark and quark-antiquark interactions.

• 理論物理学刊行会の論文
• 2007-11-09

著者

• NAKAMOTO Choki

  Suzuka National College of Technology

• Nemura Hidekatsu

  Advanced Meson Science Laboratory Nishina Center Riken

• NEMURA Hidekatsu

  Advanced Meson Science Laboratory, Nishina Center, RIKEN

関連論文

• Quark-Model Baryon-Baryon Interaction and Its Applications to Hypernuclei(Proceedings of the 18th Nishinomiya Yukawa Memorial Symposium)
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• Scattering Observables of the NN and YN Interactions in the SU_6 Quark Model : Nuclear Physics
• Scattering Observables Σ^+p System in the SU_6 Quark Model
• Scattering Observables of NN Interaction in the SU_6 Quark Model
• Central Force of Baryon-Baryon Interactions with S=-2 in the SU_6 Quark Model : Nuclear Physics
• Extended Time-Reversal Operator and the Symmetries of the Hyperon-Nucleon Interaction : Nuclear Physics
• RGM Study of the Hyperon-Nucleon Interaction in the SU_6 Quark Model.II : Analysis of ΛΝ-ΣΝ(I=1/2) Coupled-Channel System : Nuclear Physics
• RGM Study of the Hyperon-Nucleon Interaction in the SU_6 Quark Model. I : Analysis of NN and Σ^+p Systems : Nuclear Physics
• Central Force of the Hyperon-Nucleon Interaction in the SU_6 Quark Model : Nuclear Physics
• G-Matrix Equation in the Quark-Model Resonating-Group Method for Baryon-Baryon Interaction
• Study of Light Λ-and ΛΛ-Hypernuclei with the Stochastic Variational Method and Effective ΛN Potentials
• Quark Pauli Effects on the Binding Energies of s-Shell Λ Hypernuclei
• Stochastic Variational Method Applied to Pentaquarks(Pentaquarks and related topics, Exotic hadrons, New Frontiers in QCD-Exotic Hadrons and Hadronic Matter-)
• One and Two Baryon Systems in the Chiral Constituent Quark Model
• Inelastic Capture Ratio at Rest and Low-Energy Cross Sections of Σ^-p Scattering in the SU_6 Quark Model : Nuclear Physics
• Scattering Observables of the NN and YN Interactions in the SU_6 Quark Model : Nuclear Physics
• Quark-Model Baryon-Baryon Interaction and Its Applications to Hypernuclei(Proceedings of the 18th Nishinomiya Yukawa Memorial Symposium)

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