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arXiv 1901.02428hep-thgr-qchep-ph
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超对称破缺的开放弦论中的量子稳定性

Quantum stability in open string theory with broken supersymmetry

Herve Partouche

摘要:

我们考虑在环面上紧化的I型弦论中的单圈有效势,超对称性被Scherk-Schwarz机制破缺。在固定的超对称破缺标度M下,直到指数抑制项,我们证明了在维数d<=5时,势允许任意符号的局部极小值。开弦的威尔逊线是有质量的,而闭弦的模量是平坦的方向。在T-对偶图中,相关的背景涉及孤立的1/2膜,其位置被冻结在定向折叠平面上,从而降低了规范群的秩,并在基本表象中引入了无质量的费米子。

英文摘要:

We consider the 1-loop effective potential in type I string theory compactified on a torus, with supersymmetry broken by the Scherk-Schwarz mechanism. At fixed supersymmetry breaking scale M, and up to exponentially suppressed terms, we show that the potential admits local minima of arbitrary sign, in dimension d<=5. While the open string Wilson lines are massive, the closed string moduli are flat directions. In a T-dual picture, the relevant backgrounds involve isolated 1/2-branes, whose positions are frozen on orientifold planes, thus decreasing the rank of the gauge group, and introducing massless fermions in fundamental representations.

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