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<p>We show that solutions to the strong CP problem based on modular invariance can be extended to incorporate features that appear in string compactifications: quarks with mostly positive modular weights and non-trivial gauge kinetic functions. This requires assuming that singularities and zeroes only appear at special points, such as decompactification limits. We discuss the impact of these assumptions on string gauge unification.</p>

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Solving the strong CP problem in string-inspired theories with modular invariance

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月12日

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  • Ferruccio Feruglio,
  • Antonio Marrone,
  • Alessandro Strumia,
  • Arsenii Titov

摘要

We show that solutions to the strong CP problem based on modular invariance can be extended to incorporate features that appear in string compactifications: quarks with mostly positive modular weights and non-trivial gauge kinetic functions. This requires assuming that singularities and zeroes only appear at special points, such as decompactification limits. We discuss the impact of these assumptions on string gauge unification.