A sphaleron in the (3+1)-dimensional extended sigma-model

被引：0
|
作者：
Shurgaia, AV
MullerKirsten, HJW
Tchrakian, DH
机构：
[1] GEORGIAN ACAD SCI, INST MATH, DEPT THEORET PHYS, TBILISI 380060, GEORGIA
[2] ST PATRICKS COLL, DEPT MATH PHYS, MAYNOOTH, KILDARE, IRELAND
来源：
ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1996年 / 69卷 / 03期
关键词：
D O I：
10.1007/s002880050058
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The sigma-model in (3 + 1)-dimensions extended by addition of the quartic and sextic terms is investigated. In the presence of a symmetry-breaking potential the existence of both instanton and sphaleron configurations is shown. In order to obtain an explicit sphaleron solution, the sextic and potential terms are retained and the stability problem is studied. On the basis of general arguments the existence of a negative eigenvalue is proven and with some approximation calculated.
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页码：537 / 541
页数：5
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