arXiv 1111.57572011-11hep-thhep-lat

正交规范中的有效弦谱

The effective string spectrum in the orthogonal gauge

Ofer Aharony, Matan Field, Nizan Klinghoffer

备注：: 21 pages
DOI：: 10.1007/JHEP04(2012)048

摘要：

在量子场论中，对长的类弦物体的低能有效作用量，例如约束弦，包括南武-后藤作用量和高阶导数修正。这个作用量是同态不变的，并且可以在不同的规范下进行分析。波尔钦斯基和斯特罗明格提出了一种具体的方法来分析正交规范中的有效作用量，其中世界面上的诱导度规共形地等价于平坦度规。他们的建议导致了一个特定的条款，在下一个订单以外的南部后藤行动。我们计算的领导校正南武-后藤频谱使用的行动，包括这一项，我们表明，它同意与先前计算的静态规范的领导校正。这给出了对波尔钦斯基和斯特罗明格框架的一致性检验，并有助于理解它与静态规范理论的关系。

英文摘要：

The low-energy effective action on long string-like objects in quantum field theory, such as confining strings, includes the Nambu-Goto action and then higher-derivative corrections. This action is diffeomorphism-invariant, and can be analyzed in various gauges. Polchinski and Strominger suggested a specific way to analyze this effective action in the orthogonal gauge, in which the induced metric on the worldsheet is conformally equivalent to a flat metric. Their suggestion leads to a specific term at the next order beyond the Nambu-Goto action. We compute the leading correction to the Nambu-Goto spectrum using the action that includes this term, and we show that it agrees with the leading correction previously computed in the static gauge. This gives a consistency check for the framework of Polchinski and Strominger, and helps to understand its relation to the theory in the static gauge.

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