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<p>We present a more efficient method for constructing the complete EFT operator basis for particles of any mass and spin, based on on-shell method and Young tableaux. By classifying the amplitude bases according to the polarization configurations of massive particles and using their high-energy limit, our approach can construct EFT basis in a straightforward way, without need of auxiliary fields and tedious basis decomposition. Based on this improved method, we develop a <i>Mathematica</i> code that can automatically construct the EFT basis for particles of any spin. As applications, the EFT bases up to <i>d</i> = 8 are explicitly constructed for dark photons and, for the first time, for spin-3/2 particles.</p>

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Dark photons and high spin particles: complete EFT operator basis

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月8日

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  • Ziyu Dong,
  • Teng Ma,
  • Chengjie Yang,
  • Zizheng Zhou

摘要

We present a more efficient method for constructing the complete EFT operator basis for particles of any mass and spin, based on on-shell method and Young tableaux. By classifying the amplitude bases according to the polarization configurations of massive particles and using their high-energy limit, our approach can construct EFT basis in a straightforward way, without need of auxiliary fields and tedious basis decomposition. Based on this improved method, we develop a Mathematica code that can automatically construct the EFT basis for particles of any spin. As applications, the EFT bases up to d = 8 are explicitly constructed for dark photons and, for the first time, for spin-3/2 particles.