arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0912.3672hep-th
收藏

N=1,d=4超引力中的畴壁和瞬子

Domain walls and instantons in N=1, d=4 supergravity

M. Huebscher, P. Meessen, T. Ortin

摘要:

研究了N=1,d=4类超引力的(多)畴壁解和(多)瞬子解的超对称性来源,即:超对称拓扑缺陷的世界体积有效作用量.畴壁解自然地耦合到最近发现的作为N=1,d=4张量族的一部分的两个3-形式(即它们通常有两个电荷),它们的张力是超势截面L的绝对值。源的引入(我们研究的是有限厚度和消失厚度的源)等价于引入局部耦合常数,并导致解的剧烈变化。我们的结果要求对N=1,d=4的超引力进行民主的重新表述,其中耦合常数是离壳的标量场。瞬子的有效作用量总是与描述瞬子的零测地线(在威克旋转标量流形中)的无扭嵌入正交的坐标成比例。我们展示了它们的超对称性,并找到了相应的超对称(多)瞬子解。

英文摘要:

We study the supersymmetric sources of (multi-) domain-wall and (multi-) instanton solutions of generic N=1, d=4 supergravities, that is: the worldvolume effective actions for said supersymmetric topological defects. The domain-wall solutions naturally couple to the two 3-forms recently found as part of the N=1, d=4 tensor hierarchy (i.e. they have two charges in general) and their tension is the absolute value of the superpotential section L. The introduction of sources (we study sources with finite and vanishing thickness) is equivalent to the introduction of local coupling constants and results in dramatic changes of the solutions. Our results call for a democratic reformulation of N=1,d=4 supergravity in which coupling constants are, off-shell, scalar fields. The effective actions for the instantons are always proportional to the coordinate orthogonal to the twist-free embedding of the null-geodesic (in the Wick-rotated scalar manifold) describing the instanton. We show their supersymmetry and find the associated supersymmetric (multi-) instanton solutions.

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。

↑