D-brane probes on G2 orbifolds -: art. no. 004

被引:0
作者
Ferretti, G [1 ]
Salomonson, P
Tsimpis, D
机构
[1] Univ Gothenburg, Inst Theoret Phys, S-41296 Gothenburg, Sweden
[2] Chalmers, S-41296 Gothenburg, Sweden
来源
JOURNAL OF HIGH ENERGY PHYSICS | 2002年 / 03期
关键词
bosonic strings; D-branes;
D O I
暂无
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
We consider type-IIB string theory on a seven dimensional orbifold with holonomy in G(2). The motivation is to use D1-branes as probes of the geometry. The low energy theory on the D1-brane is a sigma-model with two real supercharges (N = (1, 1) in two dimensional language). We study in detail the closed and open string sectors and propose a coupling of the twisted fields to the brane that modifies the vacuum moduli space so that the singularity at the origin is removed. Instead of coming from D-terms, which are not present here, the modification comes from a "twisted" mass term for the seven scalar multiplets on the brane. The proposed mechanism involves a generalization of the moment map.
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页数:15
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