Masses of the 70- Baryons in large Nc QCD -: art. no. 102002

被引：146

作者：

Schat, CL ^{[1
]}

Goity, JL

Scoccola, NN

机构：

[1] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[2] Hampton Univ, Dept Phys, Hampton, VA 23668 USA

[3] Comis Nacl Energia Atom, Dept Phys, RA-1429 Buenos Aires, DF, Argentina

[4] Univ Favaloro, RA-1078 Buenos Aires, DF, Argentina

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.88.102002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The masses of the negative parity 70-plet baryons are analyzed in large N-c QCD to order 1/Nc and to first order in SU(3) symmetry breaking. The existing experimental data are well reproduced and 20 new observables are predicted. The leading order SU(6) spin-flavor symmetry breaking is small and, as it occurs in the quark model, the subleading in 1/N-c hyperfine interaction is the dominant source of the breaking. It is found that the A(1405) and A(1520) are well described as three-quark states and spin-orbit partners. New relations between splittings in different SU(3) multiplets are found.

引用

页码：102002 / 102002

页数：4

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