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

共 26 条

[11] SPIN-FLAVOR STRUCTURE OF LARGE N-C BARYONS [J].

DASHEN, RF ;

JENKINS, E ;

MANOHAR, AV .

PHYSICAL REVIEW D, 1995, 51 (07) :3697-3727

[12] SU(6)W FIT TO NEGATIVE PARITY BARYON DECAY-RATES [J].

FAIMAN, D ;

PLANE, DE .

NUCLEAR PHYSICS B, 1972, B 50 (DEC15) :379-&

[13] LARGE-N QCD BARYON DYNAMICS - EXACT RESULTS FROM ITS RELATION TO THE STATIC STRONG-COUPLING THEORY [J].

GERVAIS, JL ;

SAKITA, B .

PHYSICAL REVIEW LETTERS, 1984, 52 (02) :87-89

[14] LARGE-N BARYONIC SOLITON AND QUARKS [J].

GERVAIS, JL ;

SAKITA, B .

PHYSICAL REVIEW D, 1984, 30 (08) :1795-1804

[15]

Glozman L. Ya., 1996, Physics Reports, V268, P263, DOI 10.1016/0370-1573(95)00062-3

[16] Nc limit of spin-flavor breaking in excited baryon levels [J].

Goity, JL .

PHYSICS LETTERS B, 1997, 414 (1-2) :140-148

[17]

Groom DE, 2000, EUR PHYS J C, V15, P1

[18]

HEY AJG, 1975, NUCL PHYS B, V95, P516, DOI 10.1016/0550-3213(75)90333-8

[19] P-WAVE BARYONS IN THE QUARK-MODEL [J].

ISGUR, N ;

KARL, G .

PHYSICAL REVIEW D, 1978, 18 (11) :4187-4205

[20] Mesonlike baryons and the spin-orbit puzzle [J].

Isgur, N .

PHYSICAL REVIEW D, 2000, 62 (01) :1-9

← 1 2 3 →