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
收藏
页码：637 / 657
页数：21
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