The electroproduction of the Δ(1232) in the chiral quark-soliton model

被引：29

作者：

Silva, A ^{[1
]}

Urbano, D

Watabe, T

Fiolhais, M

Goeke, K

机构：

[1] Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany

[2] Univ Porto, Fac Engn, P-4000 Oporto, Portugal

[3] Osaka Univ, Nucl Phys Res Ctr, Ibaraki, Osaka 567, Japan

[4] Univ Coimbra, Dept Fis, P-3000 Coimbra, Portugal

[5] Univ Coimbra, Ctr Fis Computac, P-3000 Coimbra, Portugal

来源：

NUCLEAR PHYSICS A | 2000年 / 675卷 / 3-4期

关键词：

chiral quark-soliton model; delta electroproduction;

D O I：

10.1016/S0375-9474(00)00195-0

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：

We calculate the ratios E2/M1 and C2/M1 for the electroproduction of the Delta (1232) in the region of photon virtuality 0 < -q(2) < 1 GeV2. The magnetic dipole amplitude M1 is also presented. The theory used is the chiral quark-soliton model, which is based on the instanton vacuum of the QCD, The calculations are performed in flavours SU(2) and SU(3) taking rotational (1/N-c) corrections into account. The results for the ratios agree qualitatively with the available data, although the magnitude of both ratios seems to underestimate the latest experimental results. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：637 / 657

页数：21

共 59 条

[1] Radiative decays of hyperons in the Skyrme model: E2/M1 transitions ratios [J].

Abada, A ;

Weigel, H ;

Reinhardt, H .

PHYSICS LETTERS B, 1996, 366 (1-4) :26-31

[2]

ADLER JC, 1972, NUCL PHYS B, V46, P573

[3] A three-body force model for the electromagnetic excitation of the nucleon [J].

Aiello, M ;

Ferraris, M ;

Giannini, MM ;

Pizzo, M ;

Santopinto, E .

PHYSICS LETTERS B, 1996, 387 (01) :215-221

[4] Baryons as chiral solitons in the Nambu-Jona-Lasinio model [J].

Alkofer, R ;

Reinhardt, H ;

Weigel, H .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1996, 265 (03) :139-252

[5]

[Anonymous], COMMUNICATION

[6]

ASH WW, 1967, PHYS LETT B, V24, P154

[7] RELATIVISTIC EFFECTS, QCD MIXING ANGLES AND N-]N-GAMMA AND DELTA-]N-GAMMA TRANSITION FORM-FACTORS [J].

AZNAURYAN, IG .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1993, 346 (04) :297-305

[8] How to extract the P33(1232) resonance contributions from the amplitudes M1+3/2, E1+3/2, S1+3/2 of pion electroproduction on nucleons [J].

Aznauryan, IG .

PHYSICAL REVIEW D, 1998, 57 (05) :2727-2735

[9] ELECTROPRODUCTION OF PIONS NEAR DELTA(1236) ISOBAR AND FORM FACTOR GM(Q2) OF (GAMMANDELTA)-VERTEX [J].

BARTEL, W ;

DUDELZAK, B ;

KREHBIEL, H ;

MCELROY, J ;

MEYERBER.U ;

SCHMIDT, W ;

WALTHER, V ;

WEBBER, G .

PHYSICS LETTERS B, 1968, B 28 (02) :148-&

[10] PI0 ELECTROPRODUCTION AT DELTA (1236) RESONANCE AT A 4-MOMENTUM TRANSFER OF Q2 = 0.3 (GEV/C)2 [J].

BATZNER, K ;

BECK, U ;

BECKS, KH ;

DREES, J ;

KNOP, G ;

KOLANOSK.H ;

LEENEN, M ;

MOSER, K ;

NIETZEL, C ;

SCHLOSSE.E ;

STIER, HE .

NUCLEAR PHYSICS B, 1974, B 76 (01) :1-14

← 1 2 3 4 5 6 →