Scholarlink

<p>The minimal type-I seesaw model provides a simple explanation of neutrino flavor oscillations and induces charged lepton flavor violation (cLFV). Despite extensive previous studies, semileptonic cLFV channels remain underexplored. Using updated form factors, decay constants, and oscillation data, we revisit <i>τ</i> and meson decay channels, performing a systematic comparison across the seesaw parameter space. Surprisingly, we find that decays such as <i>τ</i> → <i>ℓρ</i> can dominate over purely leptonic <i>τ</i>-sector probes, including <i>τ</i> → 3<i>ℓ</i> and even <i>τ</i> → <i>ℓγ</i>, in certain regions. In contrast, heavy-meson decays remain far below experimental sensitivity. Considering global constraints on the seesaw parameters, we derive branching ratios for the relevant cLFV processes and identify those within potential reach of next-generation experiments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Revisiting lepton flavor violation: τ and meson decays

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月9日

查看全文
  • Kevin A. Urquía-Calderón,
  • Oleg Ruchayskiy

摘要

The minimal type-I seesaw model provides a simple explanation of neutrino flavor oscillations and induces charged lepton flavor violation (cLFV). Despite extensive previous studies, semileptonic cLFV channels remain underexplored. Using updated form factors, decay constants, and oscillation data, we revisit τ and meson decay channels, performing a systematic comparison across the seesaw parameter space. Surprisingly, we find that decays such as τ → ℓρ can dominate over purely leptonic τ-sector probes, including τ → 3ℓ and even τ → ℓγ, in certain regions. In contrast, heavy-meson decays remain far below experimental sensitivity. Considering global constraints on the seesaw parameters, we derive branching ratios for the relevant cLFV processes and identify those within potential reach of next-generation experiments.