Revolving D-branes and Spontaneous Gauge symmetry breaking
Revolving D-branes and Spontaneous Gauge symmetry breaking
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旋转 D 膜和自发规范对称性破缺
DOI：
10.1093/ptep/ptv157
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Norikazu Kitazawa
中科院分区：
文献类型：
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作者：
Satoshi Iso;Norikazu Kitazawa
我们提出了一个新的机制，自发规范对称性破缺的世界体积理论的旋转D膜周围的一个固定点的orbifolds。在本文中，我们考虑了一个简单的理论模型，我们把D3-膜，D 7-膜，和他们的反膜。该组态打破了超对称性，但满足Ramond-Ramond蝌蚪相消条件。一组三个D3-膜在一个轨道不动点上可以从该点分离，但是，当它们垂直于放置在该不动点上的反D 7-膜移动时，由于D3-膜和反D 7-膜之间的吸引相互作用，它们被拉回。为了使D3-膜在非零距离处的分离稳定，我们考虑D3-膜围绕不动点的旋转。然后D3-膜上的规范对称性自发破缺，规范群的秩降低。这个距离可以通过适当地选择旋转D3-膜的角动量来任意设定，而角动量应该由D-膜组态的宇宙学演化的初始条件来决定。这个距离对应于世界体积理论中膜模场的真空期望值，如果把它写成弦标度，规范对称破缺的标度由下式给出。旋转D3-膜的角动量守恒保证了标度的稳定性。
We propose a new mechanism of spontaneous gauge-symmetry breaking in the world-volume theory of revolving D-branes around a fixed point of orbifolds. In this paper, we consider a simple model of theorbifold on which we put D3-branes, D7-branes, and their anti-branes. The configuration breaks supersymmetry, but the Ramond–Ramond tadpole cancellation conditions are satisfied. A set of three D3-branes at an orbifold fixed point can separate from the point, but, when they move perpendicular to the anti-D7-branes put on the fixed point, they are pulled back due to an attractive interaction between the D3- and anti-D7-branes. In order to stabilize the separation of the D3-branes at nonzero distance, we consider revolution of the D3-branes around the fixed point. Then the gauge symmetry on the D3-branes is spontaneously broken, and the rank of the gauge group is reduced. The distance can be set at will by appropriately choosing the angular momentum of the revolving D3-branes, which should be determined by the initial condition of the cosmological evolution of the D-brane configurations. The distance corresponds to the vacuum expectation values of brane moduli fields in the world-volume theory and, if it is written asin terms of the string scale, the scale of gauge-symmetry breaking is given by. Angular momentum conservation of revolving D3-branes assures the stability of the scaleagainst.