Nucleon form factors and a nonpointlike diquark

被引：54

作者：

Bloch, JCR

Roberts, CD

Schmidt, SM

Bender, A

Frank, MR

机构：

[1] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[2] Univ Adelaide, Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia

[3] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW C | 1999年 / 60卷 / 06期

关键词：

D O I：

10.1103/PhysRevC.60.062201

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Nucleon form factors are calculated on q(2) is an element of [0,3] GeV2 using an ansatz for the nucleon's Faddeev amplitude motivated by quark-diquark solutions of the relativistic Faddeev equation. Only the scalar diquark is retained, and it and the quark are confined. A good description of the data requires a,, nonpointlike diquark correlation with an electromagnetic radius of 0.8 r(pi). The composite, nonpointlike nature of the diquark is crucial. It provides for diquark-breakup terms that are of greater importance than the diquark photon absorption contribution. [S0556-2813(99)51711-1].

引用

页数：5

共 26 条

[1] Calculation of the anomalous gamma pi(*)->pi pi form factor [J].

Alkofer, R ;

Roberts, CD .

PHYSICS LETTERS B, 1996, 369 (02) :101-107

[2] PION LOOP CONTRIBUTION TO THE ELECTROMAGNETIC PION CHARGE RADIUS [J].

ALKOFER, R ;

BENDER, A ;

ROBERTS, CD .

INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 1995, 10 (23) :3319-3342

[3] ANALYTIC PROPERTIES OF THE VERTEX FUNCTION IN GAUGE-THEORIES .1. [J].

BALL, JS ;

CHIU, TW .

PHYSICAL REVIEW D, 1980, 22 (10) :2542-2549

[4] Nonperturbative three-point vertex in massless quenched QED and perturbation theory constraints [J].

Bashir, A ;

Kizilersu, A ;

Pennington, MR .

PHYSICAL REVIEW D, 1998, 57 (02) :1242-1249

[5] Goldstone theorem and diquark confinement beyond rainbow-ladder approximation [J].

Bender, A ;

Roberts, CD ;

vonSmekal, L .

PHYSICS LETTERS B, 1996, 380 (1-2) :7-12

[6]

BENDER A, 1997, P 14 INT C PART NUCL, P669

[7] Electromagnetic form factors of charged and neutral kaons [J].

Burden, C ;

Roberts, C ;

Thomson, MJ .

PHYSICS LETTERS B, 1996, 371 (3-4) :163-168

[8] Ground-state spectrum of light-quark mesons [J].

Burden, CJ ;

Qian, L ;

Roberts, CD ;

Tandy, PC ;

Thomson, MJ .

PHYSICAL REVIEW C, 1997, 55 (05) :2649-2664

[9] BARYON STRUCTURE AND QCD - NUCLEON CALCULATIONS [J].

BURDEN, CJ ;

CAHILL, RT ;

PRASCHIFKA, J .

AUSTRALIAN JOURNAL OF PHYSICS, 1989, 42 (02) :147-159

[10] BARYON STRUCTURE AND QCD [J].

CAHILL, RT ;

ROBERTS, CD ;

PRASCHIFKA, J .

AUSTRALIAN JOURNAL OF PHYSICS, 1989, 42 (02) :129-145

← 1 2 3 →