Reduction of open string amplitudes by mostly BRST exact operators

Reduction of open string amplitudes by mostly BRST exact operators
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主要通过 BRST 精确算子减少开弦振幅

DOI:
10.1016/j.physletb.2021.136664
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发表时间:
2021
期刊:
影响因子:
4.4
通讯作者:
Takahashi Tomohiko
Takahashi Tomohiko
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Seki Shigenori;Takahashi Tomohiko

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我们研究了开弦的两点和三点树级振幅。这些幅度主要是通过使用BRST精确算符来确定规范而从高点关联函数中减去的。为简单起见,我们将重点放在一个开放的弦速粒子上。开弦快子的两点振幅由两个快子顶点算符和一个主要是BRST精确算符的三点函数约化而成。类似地,三点振幅来自三个快子顶点算符和一个主要是BRST精确算符的四点函数。我们还可以从两个快子顶点算符和两个大多数BRST精确算符的四点函数中得到两点振幅。在这些由四点函数导出的函数中,模积分是很重要的。我们讨论在这种形式主义中不确定的幅度的整体符号。
We study two and three-point tree-level amplitudes of open strings. These amplitudes are reduced from higher-point correlation functions by using mostly BRST exact operators for gauge fixing. For simplicity, we focus on an open string tachyon. The two-point amplitude of open string tachyons is reduced from a three-point function of two tachyon vertex operators and one mostly BRST exact operator. Similarly the three-point amplitude is from a four-point function of three tachyon vertex operators and one mostly BRST exact operator. One can also obtain the two-point amplitude from the four-point function of two tachyon vertex operators and two mostly BRST exact operators. In these derivation from four-point functions, moduli integrals are significant. We discuss the overall signs of amplitudes which are indefinite in this formalism.
DOI: --
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期刊: arXiv: High Energy Physics - Theory
影响因子: --
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