Study of pentaquark and Λ(1405)

被引：0

作者：

Nemura, H. ^{[1
]}

Nakamoto, C. ^{[2
]}

机构：

[1] RIKEN, DRI, Adv Meson Sci Lab, Wako, Saitama 3510198, Japan

[2] Suzuka Natl Coll Technol, Suzuka, Mie 5100294, Japan

来源：

PARTICLES AND NUCLEI | 2006年 / 842卷

基金：

日本学术振兴会;

关键词：

pentaquark; quark model; few-body systems;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform a five-body calculation for pentaquark (q(4)(q) over bar) state of A(1405) as well as the three-body calculations for the ground state baryons and the A(1405), and two-body calculations for mesons. The hamiltonian, which reproduces reasonably well the energies of ground state baryons (N, Lambda, Sigma, Xi and Delta) and mesons (pi, K, rho, K*), includes kinetic energy of semi-relativistic form, linear confinement potential, and the simplest form of color-magnetic interaction with Gaussian form factor. Flavor symmetry breaking (m(s) > M-u,M- d) is taken into account. The energy calculated for (q(4)(q) over bar) state of Lambda(1405) is lower than the energy for the (q(3)) state. The present result suggests that the Lambda(1405) is a pentaquark-dominated state if the color-magnetic potential plays a leading role of the quark-quark and quark-antiquark interactions.

引用

页码：477 / 479

页数：3

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