Predictions for decays of radially excited baryons

被引：71

作者：

Carlson, CE ^{[1
]}

Carone, CD ^{[1
]}

机构：

[1] Coll William & Mary, Dept Phys, Nucl & Particle Theory Grp, Williamsburg, VA 23187 USA

来源：

PHYSICS LETTERS B | 2000年 / 484卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(00)00646-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the strong decays of the lowest-lying radially excited baryons, in SU(6) language the states comprising the first excited 56-plet. Assuming a single-quart; decay approximation, and negligible configuration mixing, we make model-independent predictions for the partial decay widths to final states with a single meson. Masses of unobserved states are predicted using results from large-N-c QCD, and the momentum dependence of the one-body decay amplitude is determined phenomenologically by fitting to observed decays, so that the baryon spatial wave functions are not assumed. We point out that comparison of these predictions to experiment may shed light on whether the Roper resonance can be consistently interpreted as a three-quark state. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：260 / 266

页数：7

共 18 条

[1]

BEG MAB, 1964, PHYS REV LETT, V13, P418

[2]

BUCHMANN AJ, HEPPH0003167

[3]

Carlson CE, 1998, PHYS REV D, V58, DOI 10.1103/PhysRevD.58.053005

[4] Decays of l = 1 baryons to Δγ [J].

Carlson, CE ;

Carone, CD .

PHYSICS LETTERS B, 1998, 441 (1-4) :363-370

[5] PERTURBATIVE QCD SIGNATURES OF HYBRID HADRONS IN ELECTROPRODUCTION AT HIGH Q2 [J].

CARLSON, CE ;

MUKHOPADHYAY, NC .

PHYSICAL REVIEW LETTERS, 1991, 67 (27) :3745-3748

[6] Masses of orbitally excited baryons in large Nc QCD [J].

Carlson, CE ;

Carone, CD ;

Goity, JL ;

Lebed, RF .

PHYSICS LETTERS B, 1998, 438 (3-4) :327-335

[7] DECAYS OF L=1 BARYONS - QUARK-MODEL VERSUS LARGE N-C [J].

CARONE, CD ;

GEORGI, H ;

KAPLAN, L ;

MORIN, D .

PHYSICAL REVIEW D, 1994, 50 (09) :5793-5807

[8] Review of Particle Physics [J].

The European Physical Journal C - Particles and Fields, 1998, 3 (1-4) :1-783

[9]

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

[10] SPIN + UNITARY SPIN INDEPENDENCE OF STRONG INTERACTIONS [J].

GURSEY, F ;

RADICATI, LA .

PHYSICAL REVIEW LETTERS, 1964, 13 (05) :173-&

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