Solitons in nonlocal chiral quark models

被引：41
|
作者：
Broniowski, W
Golli, B
Ripka, G
机构：
[1] Univ Ljubljana, Fac Educ, Ljubljana 1001, Slovenia
[2] Jozef Stefan Inst, Ljubljana 1001, Slovenia
[3] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[4] Ctr Etud Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France
[5] ECT, I-38050 Trento, Italy
来源：
NUCLEAR PHYSICS A | 2002年 / 703卷 / 3-4期
关键词：
effective chiral quark models; chiral solitons; Nambu-Jona-Lasinio model; nonlocal gauge theories;
D O I：
10.1016/S0375-9474(01)01670-0
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：
Properties of hedgehog solitons in a chiral quark model with nonlocal regulators are described. We discuss the formation of the hedgehog soliton, the quantization of the baryon number, the energetic stability, the gauging and construction of Noether currents with help of path-ordered P-exponents, and the evaluation of observables. The issue of nonlocality is thoroughly discussed, with a focus on contributions to observables related to the Noether currents. It is shown that with typical model parameters the solitons are not far from the weak nonlocality limit. The methods developed are applicable to solitons in models with separable nonlocal four-fermion interactions. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：667 / 701
页数：35
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