Heavy Neutral Lepton at Same-Sign Muon Collider
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866914105164562432 |
|---|---|
| author | Kitano, Ryuichiro Low, Ian Matsudo, Ryutaro Okawa, Shohei Roy, Subhojit |
| author_facet | Kitano, Ryuichiro Low, Ian Matsudo, Ryutaro Okawa, Shohei Roy, Subhojit |
| contents | We explore the discovery potential of heavy neutral leptons (HNLs), motivated by models addressing the origin of neutrino masses, at the proposed high-energy same-sign muon collider known as $μ$TRISTAN. The study focuses on two complementary HNL-mediated signatures: (i) the lepton-flavor-violating (LFV) channel $μ^+μ^+ \to W^+τ^+\barν_μ$ and (ii) the lepton-number-violating (LNV) channel $μ^{+}μ^{+} \to W^{+}W^{+}$. The LNV process is the muon analogue of inverse neutrinoless double beta decay and, if observed, would provide strong evidence for Majorana neutrinos, while the LFV process offers a novel probe of flavor-changing neutral currents in the lepton sector. At the $μ$TRISTAN collider with $\sqrt{s} \sim \mathcal{O}(10)~\text{TeV}$, the resulting sensitivity to the HNL mixing with muon and tau neutrinos, as a function of mass, can surpass current bounds from the measurements of electroweak precision observables over a broad mass range. In particular, for the mixing with muon neutrinos, the collider bound can improve by an order of magnitude for $5$-$10$ TeV HNLs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18390 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Heavy Neutral Lepton at Same-Sign Muon Collider Kitano, Ryuichiro Low, Ian Matsudo, Ryutaro Okawa, Shohei Roy, Subhojit High Energy Physics - Phenomenology High Energy Physics - Experiment We explore the discovery potential of heavy neutral leptons (HNLs), motivated by models addressing the origin of neutrino masses, at the proposed high-energy same-sign muon collider known as $μ$TRISTAN. The study focuses on two complementary HNL-mediated signatures: (i) the lepton-flavor-violating (LFV) channel $μ^+μ^+ \to W^+τ^+\barν_μ$ and (ii) the lepton-number-violating (LNV) channel $μ^{+}μ^{+} \to W^{+}W^{+}$. The LNV process is the muon analogue of inverse neutrinoless double beta decay and, if observed, would provide strong evidence for Majorana neutrinos, while the LFV process offers a novel probe of flavor-changing neutral currents in the lepton sector. At the $μ$TRISTAN collider with $\sqrt{s} \sim \mathcal{O}(10)~\text{TeV}$, the resulting sensitivity to the HNL mixing with muon and tau neutrinos, as a function of mass, can surpass current bounds from the measurements of electroweak precision observables over a broad mass range. In particular, for the mixing with muon neutrinos, the collider bound can improve by an order of magnitude for $5$-$10$ TeV HNLs. |
| title | Heavy Neutral Lepton at Same-Sign Muon Collider |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2510.18390 |