Impact of unitarity violation on sensitivity of the leptonic CP phase at Hyper-Kamiokande and DUNE
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866914159372795904 |
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| author | Trzeciak, Ana Maria Garcia Nunokawa, Hiroshi Quiroga, Alexander Arguello |
| author_facet | Trzeciak, Ana Maria Garcia Nunokawa, Hiroshi Quiroga, Alexander Arguello |
| contents | We study the impact of unitarity violation on the sensitivity of the leptonic CP phase, $δ_{CP}$, considering the next generation of long-baseline neutrino experiments, Hyper-Kamiokande and DUNE. By simulating near and far detectors and assuming different scenarios for non-unitarity, we verify how it can affect the sensitivity to measure the $δ_{ CP}$ violating phase. We also probe the capability of these experiments to constrain the non-unitarity parameters and how their capability could be improved if the impact of non-unitarity at both near and the far detectors were properly taken into account. We find that the Hyper-Kamiokande experiment is robust in the presence of non-unitarity mixing, achieving a sensitivity above $5σ$ for our all considered cases. On the other hand, DUNE suffers somewhat more impact due to unitarity violation, reaching a sensitivity below 5$σ$ for some values of $δ_{CP}$. However, depending on the scenario adopted for non-unitarity, DUNE demonstrates robustness in the sensitivity to $δ_{ CP}$ phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_10873 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Impact of unitarity violation on sensitivity of the leptonic CP phase at Hyper-Kamiokande and DUNE Trzeciak, Ana Maria Garcia Nunokawa, Hiroshi Quiroga, Alexander Arguello High Energy Physics - Phenomenology We study the impact of unitarity violation on the sensitivity of the leptonic CP phase, $δ_{CP}$, considering the next generation of long-baseline neutrino experiments, Hyper-Kamiokande and DUNE. By simulating near and far detectors and assuming different scenarios for non-unitarity, we verify how it can affect the sensitivity to measure the $δ_{ CP}$ violating phase. We also probe the capability of these experiments to constrain the non-unitarity parameters and how their capability could be improved if the impact of non-unitarity at both near and the far detectors were properly taken into account. We find that the Hyper-Kamiokande experiment is robust in the presence of non-unitarity mixing, achieving a sensitivity above $5σ$ for our all considered cases. On the other hand, DUNE suffers somewhat more impact due to unitarity violation, reaching a sensitivity below 5$σ$ for some values of $δ_{CP}$. However, depending on the scenario adopted for non-unitarity, DUNE demonstrates robustness in the sensitivity to $δ_{ CP}$ phase. |
| title | Impact of unitarity violation on sensitivity of the leptonic CP phase at Hyper-Kamiokande and DUNE |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2502.10873 |