arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.2102hep-th
收藏

五阶闭玻色弦场论II:边缘形变和有效势

Closed Bosonic String Field Theory at Quintic Order II: Marginal Deformations and Effective Potential

Nicolas Moeller

摘要:

我们证明了该玻色子与一个精确的边缘场一起构成了一个多项式阶数为5的闭玻色弦场论的边缘形变模空间。我们使用这个成功的检查结果,以找到最好的函数形式的五次振幅的配合。然后,我们使用这种拟合,以准确地计算在无限的水平极限的快子和介子的有效势。我们观察到,到四阶,有效势给出了出乎意料的准确结果的真空。因此,我们推测,对于给定的阶数,有效势是整个势的一个很好的近似,包括从顶点到这个阶数的所有相互作用。然后我们继续,计算有效势到5阶。我们分析了它的真空结构,发现它有几个鞍点,包括Yang-Zwiebach真空,但也有一个局部极小值。我们讨论了这些真空的可能的物理意义。

英文摘要:

We verify that the dilaton together with one exactly marginal field, form a moduli space of marginal deformations of closed bosonic string field theory to polynomial order five. We use the results of this successful check in order to find the best functional form of a fit of quintic amplitudes. We then use this fit in order to accurately compute the tachyon and dilaton effective potential in the limit of infinite level. We observe that to order four, the effective potential gives unexpectedly accurate results for the vacuum. We are thus led to conjecture that the effective potential, to a given order, is a good approximation to the whole potential including all interactions from the vertices up to this order from the untruncated string field. We then go on and compute the effective potential to order five. We analyze its vacuum structure and find that it has several saddle points, including the Yang-Zwiebach vacuum, but also a local minimum. We discuss the possible physical meanings of these vacua.

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。

↑