On string tensions in supersymmetric gauge theory
On string tensions in supersymmetric gauge theory
复制标题
超对称规范理论中的弦张力
DOI:
10.1016/s0370-2693(02)01155-3
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发表时间:
2001
影响因子:
4.4
通讯作者:
I. Klebanov
中科院分区:
文献类型:
--
作者:
C. Herzog;I. Klebanov
In some models of N =1 supersymmetric SU(M) gauge dynamics (Nucl. Phys. B 447 (1995) 271 and Nucl. Phys. B 513 (1998) 87), the tension of a string ending on q external quarks is proportional to sin(πq/M), q=1,…,M−1. In this Letter we calculate the ratios of the q-string tensions using the recently derived type IIB gravity duals of N =1 SUSY gauge theories. Far in the IR these gravity duals contain an S3with M units of R–R 3-form flux which, upon S-duality, turns into NS–NS 3-form flux. The confining q-string is described by a D3-brane wrapping an S2⊂ S3with q units of world volume flux. For one of the gravity dual backgrounds (Maldacena–Nuñez) a D3-brane probe calculation exactly reproduces the sin(πq/M) dependence, while for another (Klebanov–Strassler) we find approximate agreement. We speculate on the connection of the q-string tensions with D-brane tensions in the SU(2) WZW model.