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<p>We present strategies for the <i>Mu3e</i> experiment to search for light, weakly coupled particles produced in rare muon decays, focusing on displaced <i>e</i><sup>+</sup><i>e</i><sup><i>−</i></sup> decays within the hollow target. In most scenarios the backgrounds can be fully suppressed with a suitable set of cuts. We furthermore quantify the interplay between displaced and prompt searches at <i>Mu3e</i> and existing constraints, showing how <i>Mu3e</i> has a unique opportunity to probe unexplored parameter space.</p>

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Displaced searches for Axion-Like Particles and Heavy Neutral Leptons at Mu3e

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年6月19日

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  • Simon Knapen,
  • Toby Opferkuch,
  • Diego Redigolo,
  • Michele Tammaro

摘要

We present strategies for the Mu3e experiment to search for light, weakly coupled particles produced in rare muon decays, focusing on displaced e+e− decays within the hollow target. In most scenarios the backgrounds can be fully suppressed with a suitable set of cuts. We furthermore quantify the interplay between displaced and prompt searches at Mu3e and existing constraints, showing how Mu3e has a unique opportunity to probe unexplored parameter space.