Authentic Majorana versus singlet Dirac neutrino contributions to μ+μ+→ℓ+ℓ+ (ℓ=e,τ) transitions,Physical Review D

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Authentic Majorana versus singlet Dirac neutrino contributions to μ+μ+→ℓ+ℓ+ (ℓ=e,τ) transitions
Physical Review D ( IF 4.6 ) Pub Date : 2024-09-12 , DOI: 10.1103/physrevd.110.053006
Jorge Luis Gutiérrez Santiago ₁ , Diego Portillo-Sánchez ₁ , G. Hernández-Tomé ₂ , Javier Rendón ₃

Affiliation

We revisited the computation of the cross section for the

μ^{+} μ^{+} \to ℓ^{+} ℓ^{+}

(ℓ^{+} = τ^{+}, e^{+})

transitions in the presence of new heavy Majorana neutrinos. We focus on scenarios where the masses of the new states are around some few TeV, the so-called low-scale seesaw models. Our analysis is set in a simple model with only two new heavy Majorana neutrinos considering the current limits on the heavy-light mixings. Our results illustrate the difference between the genuine effects of two nondegenerate heavy Majorana states and the degenerate case where they form a Dirac singlet field.

中文翻译：

真实的马约拉纳中微子与单线态狄拉克中微子对 μ+μ+→ℓ+ℓ+ (ℓ=e,τ) 跃迁的贡献

我们重新审视了横截面的计算

μ^{+} μ^{+} \to ℓ^{+} ℓ^{+}

(ℓ^{+} = τ^{+}, e^{+})

存在新的重马约拉纳中微子时的转变。我们重点关注大量新态集中在几个 TeV 左右的场景，即所谓的低规模跷跷板模型。考虑到目前重轻混合的限制，我们的分析是在一个简单的模型中进行的，只有两个新的重马约拉纳中微子。我们的结果说明了两个非简并重马约拉纳态的真实效应与它们形成狄拉克单线态场的简并情况之间的差异。

更新日期：2024-09-16

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