Sensitivity of Hyper-Kamiokande to sub-eV Sterile Neutrinos
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908779902140416 |
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| author | Cabrera, Emilse Esmaili, Arman Nunokawa, Hiroshi Trzeciak, Ana Maria Garcia |
| author_facet | Cabrera, Emilse Esmaili, Arman Nunokawa, Hiroshi Trzeciak, Ana Maria Garcia |
| contents | In this work, we investigate the sensitivity of Hyper-Kamiokande (Hyper-K) to light sterile neutrinos within the $(3+1)$ framework, consisting of three active and one sterile neutrino state. We focus on the regime where the new mass-squared splitting satisfies $Δm_{41}^{2} \lesssim 1$ eV$^{2}$, a parameter space complementary to short-baseline sterile-neutrino searches. Using both accelerator and atmospheric neutrino samples, we evaluate the expected capability of Hyper-K to constrain active-sterile mixing. Our results show that Hyper-K can significantly improve current bounds on sterile-neutrino parameters and achieve sensitivity that is competitive with that of future dedicated experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_06144 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Sensitivity of Hyper-Kamiokande to sub-eV Sterile Neutrinos Cabrera, Emilse Esmaili, Arman Nunokawa, Hiroshi Trzeciak, Ana Maria Garcia High Energy Physics - Phenomenology In this work, we investigate the sensitivity of Hyper-Kamiokande (Hyper-K) to light sterile neutrinos within the $(3+1)$ framework, consisting of three active and one sterile neutrino state. We focus on the regime where the new mass-squared splitting satisfies $Δm_{41}^{2} \lesssim 1$ eV$^{2}$, a parameter space complementary to short-baseline sterile-neutrino searches. Using both accelerator and atmospheric neutrino samples, we evaluate the expected capability of Hyper-K to constrain active-sterile mixing. Our results show that Hyper-K can significantly improve current bounds on sterile-neutrino parameters and achieve sensitivity that is competitive with that of future dedicated experiments. |
| title | Sensitivity of Hyper-Kamiokande to sub-eV Sterile Neutrinos |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.06144 |