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arXiv 0705.3811hep-thhep-ph
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N=1 SQCD中的禁闭:超越Seiberg对偶的一步

Confinement in N=1 SQCD: One Step Beyond Seiberg's Duality

M. Shifman, A. Yung

摘要:

考虑N=1超对称量子色动力学(SQCD),其中规范群为U(N_c),夸克味为N_c+N。N_c味是无质量的,相应的夸克场在希格斯分支上产生(小)真空期望值(VEVs)。额外的N味被赋予小(和相等)的质量项。我们通过它的Seiberg对偶:U(N)规范理论,用N_c +N味的“对偶夸克”场加一个规范-单重态介子场M来研究这个理论。最初的理论被称为“夸克理论”,而对偶理论被称为“夸克理论”。“建议的轻微变形塞伯格的程序改变了动力学制度的量子理论从红外自由到渐近自由在大距离。我们表明,在凝聚的“对偶夸克”,对偶理论支持非阿贝尔通量管(弦)。塞伯格的对偶性超越了纯粹的无质量状态,包括两边的轻态。用夸克理论解释,夸克理论通量管被认为携带色电场。弦结--受限的夸克理论单极子--可以被看作是原始夸克理论的“组成夸克”。我们把闭弦解释为原来夸克理论的胶球。此外,还有由一对不同的非阿贝尔弦连接的两个结形成的弦配置。它们可以被认为是夸克理论中的夸克介子。

英文摘要:

We consider N=1 supersymmetric quantum chromodynamics (SQCD) with the gauge group U(N_c) and N_c+N quark flavors. N_c flavors are massless; the corresponding squark fields develop (small) vacuum expectation values (VEVs) on the Higgs branch. Extra N flavors are endowed with small (and equal) mass terms. We study this theory through its Seiberg's dual: U(N) gauge theory with N_c +N flavors of "dual quark" fields plus a gauge-singlet mesonic field M. The original theory is referred to as "quark theory" while the dual one is termed "monopole theory." The suggested mild deformation of Seiberg's procedure changes the dynamical regime of the monopole theory from infrared free to asymptotically free at large distances. We show that, upon condensation of the "dual quarks," the dual theory supports non-Abelian flux tubes (strings). Seiberg's duality is extended beyond purely massless states to include light states on both sides. Being interpreted in terms of the quark theory, the monopole-theory flux tubes are supposed to carry chromoelectric fields. The string junctions -- confined monopole-theory monopoles -- can be viewed as "constituent quarks" of the original quark theory. We interpret closed strings as glueballs of the original quark theory. Moreover, there are string configurations formed by two junctions connected by a pair of different non-Abelian strings. These can be considered as constituent quark mesons of the quark theory.

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。

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