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arXiv 2005.01321hep-th
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关于具有“质量”边界项的开弦的评论

Comments on open string with "massive" boundary term

A. A. Tseytlin

摘要:

我们做一些评论可能的定义开弦路径积分在存在额外的边界耦合对应的存在下,在字符串的两端的质量。这些耦合不是共形不变的,这意味着在非临界弦的情况下,一个是集成的一维度量或边界的重新参数化。我们计算了在一个额外的恒定规范场背景的存在下,盘上的配分函数和相应的散射振幅的结构上的评论。

英文摘要:

We make some remarks on possible definition of open string path integral in the presence of additional boundary couplings corresponding to the presence of masses at the ends of the string. These couplings are not conformally invariant implying that as in a non-critical string case one is to integrate over the 1d metric or reparametrizations of the boundary. We compute the partition function on the disc in the presence of an additional constant gauge field background and comment on the structure of the corresponding scattering amplitudes.

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