Four-nucleon system with Δ-isobar excitation

被引：60

作者：

Deltuva, A. ^{[1
]}

Fonseca, A. C. ^{[1
]}

Sauer, P. U. ^{[2
]}

机构：

[1] Univ Lisbon, Ctr Fis Nucl, P-1649003 Lisbon, Portugal

[2] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany

来源：

PHYSICS LETTERS B | 2008年 / 660卷 / 05期

关键词：

four-nucleon; bound state; scattering; Delta-isobar; many-nucleon forces;

D O I：

10.1016/j.physletb.2007.12.058

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The four-nucleon bound state and scattering below three-body breakup threshold are described based on the realistic coupled-channel potential CD Bonn + Delta which allows the excitation of a single nucleon to a Delta isobar. The Coulomb repulsion between protons is included. In the four-nucleon system the two-baryon coupled-channel potential yields effective two-, three- and four-nucleon forces, mediated by the Delta isobar and consistent with each other and with the underlying two-nucleon force. The effect of the four-nucleon force on the studied observables is much smaller than the effect of the three-nucleon force. The inclusion of the A isobar is unable to resolve the existing discrepancies with the experimental data. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：471 / 477

页数：7

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