arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0802.3135hep-th
收藏

非阿贝尔云的畴壁

Domain Walls with Non-Abelian Clouds

Minoru Eto, Toshiaki Fujimori, Muneto Nitta, Keisuke Ohashi, Norisuke Sakai

摘要:

在U(N)规范理论中,与具有简并质量的Higgs标量场耦合的畴壁被证明具有可归一化的非阿贝尔Nambu-Goldstone(NG)模,我们称之为非阿贝尔云。我们构造了畴壁上有效场论的模空间度规及其Kahler势,主要研究了两种模型:一种是具有多个荷电Higgs场的U(1)规范理论,另一种是具有2N个Higgs场的U(N)规范理论.我们发现非阿贝尔云在两个畴壁之间传播,并且它们的旋转引起长程排斥力,与具有完全非简并质量的模型中的U(1)模式相反,该模式产生短程力。我们还通过引入希格斯质量的虚部构造了一个双子畴壁的束缚态。在后一种模型中,当所有壁面重合时,SU(N)_L × SU(N)_R × U(1)对称性被破缺为SU(N)_V,U(N)_A NG模和相同数目的准NG模局域在壁面上。当n个壁面分离时,U(n)NG模的非对角元的波函数在两个分离壁面之间传播(非阿贝尔云),而某些准NG模由于进一步的对称破缺U(n)_V --> U(1)_V^n而转变为NG玻色子。在4+1维体的情况下,我们可以对偶的有效理论的非阿贝尔2-形式场的超对称Freedman-Townsend模型。

英文摘要:

Domain walls in U(N) gauge theories, coupled to Higgs scalar fields with degenerate masses, are shown to possess normalizable non-Abelian Nambu-Goldstone(NG) modes, which we call non-Abelian clouds. We construct the moduli space metric and its Kahler potential of the effective field theory on the domain walls, by focusing on two models: a U(1) gauge theory with several charged Higgs fields, and a U(N) gauge theory with 2N Higgs fields in the fundamental representation. We find that non-Abelian clouds spread between two domain walls and that their rotation induces long-range repulsive force, in contrast to a U(1) mode in models with fully non-degenerate masses which gives short-range force. We also construct a bound state of dyonic domain walls by introducing the imaginary part of the Higgs masses. In the latter model we find that when all walls coincide SU(N)_L x SU(N)_R x U(1) symmetry is broken down to SU(N)_V, and U(N)_A NG modes and the same number of quasi-NG modes are localized on the wall. When n walls separate, off diagonal elements of U(n) NG modes have wave functions spreading between two separated walls (non-Abelian clouds), whereas some quasi-NG modes turn to NG bosons as a result of further symmetry breaking U(n)_V --> U(1)_V^n. In the case of 4+1 dimensional bulk, we can dualize the effective theory to the supersymmetric Freedman-Townsend model of non-Abelian 2-form fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑