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arXiv 1812.03357hep-thhep-ph
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规范背景下的零模乘积展开和高阶耦合

Zero-mode product expansions and higher order couplings in gauge backgrounds

Masaki Honda, Tatsuo Kobayashi, Hajime Otsuka

摘要:

本文研究了由一般规范背景下的额外维场论导出的四维低能有效场论。我们发现费米子零模和最轻标量模之间的乘积被其他费米子零模和最轻标量模展开。利用这一点,我们证明了费米子零模和最轻标量模之间的高阶耦合可以分解为三点耦合。这个选择规则源自于Dirac型算子的结构,它表明了作为基础的共形场论的算子乘积展开。

英文摘要:

We study a four-dimensional low-energy effective field theory derived from extra dimensional field theories with general gauge backgrounds. We find that products among fermionic zero-modes and lightest scalar modes are expanded by other fermionic zero-modes and lightest scalar modes. Using this aspect, we show that higher-order couplings among the fermionic zero-modes and the lightest scalar mode can be decomposed into three-point couplings. This selection rule originating from a structure of the Dirac-type operators indicates the operator product expansion the underlying conformal field theory.

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