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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| Accès en ligne: | https://arxiv.org/abs/2409.11824 |
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| _version_ | 1866929560997593088 |
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| author | Cao, Son Quyen, P. T. Van, N. T. Hong Nath, Ankur Ngoc, T. V. |
| author_facet | Cao, Son Quyen, P. T. Van, N. T. Hong Nath, Ankur Ngoc, T. V. |
| contents | Among three leptonic mixing angles, $θ_{23}$ angle, which characterizes the fractional contribution of two flavor eigenstates $ν_μ$ and $ν_τ$ to the third mass eigenstate $ν_3$, is known to be the largest but the least precisely measured. The work investigates possible reach of $θ_{23}$ precision with two upcoming gigantic accelerator-based long-baseline neutrino experiments, namely Hyper-Kamiokande and DUNE experiments as well as a possible joint analyses of future neutrino facilities. Our simulation yields that each experiment will definitely establish the octant of $θ_{23}$ angle for all values within 1$σ$ parameter interval, while considering the current limitation. However, if the actual value is $0.48\leq \sin^2θ_{23}\leq 0.54$, it becomes challenging for these two experiments to reject the maximal ($θ_{23}=π/4$) hypothesis and conclude its octant. This octant-blind region can be further explored with the proposed facilities ESSnuSB and a neutrino factory. Accurate determination of the mixing angle $θ_{23}$, as well as the accuracy of $δ_{CP}$, is crucial for examining a certain category of discrete non-Abelian leptonic flavor models. Specifically if CP is conserved in leptonic sector, the combined analysis of Hyper-K and DUNE will rule out the majority of these models. However, if the CP is maximally violated, higher precision of $δ_{CP}$ is necessary for testing these flavor models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_11824 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On Precision of the Leptonic Mixing Angle $θ_{23}$ and its Implications for the Flavor Models Cao, Son Quyen, P. T. Van, N. T. Hong Nath, Ankur Ngoc, T. V. High Energy Physics - Phenomenology High Energy Physics - Experiment Among three leptonic mixing angles, $θ_{23}$ angle, which characterizes the fractional contribution of two flavor eigenstates $ν_μ$ and $ν_τ$ to the third mass eigenstate $ν_3$, is known to be the largest but the least precisely measured. The work investigates possible reach of $θ_{23}$ precision with two upcoming gigantic accelerator-based long-baseline neutrino experiments, namely Hyper-Kamiokande and DUNE experiments as well as a possible joint analyses of future neutrino facilities. Our simulation yields that each experiment will definitely establish the octant of $θ_{23}$ angle for all values within 1$σ$ parameter interval, while considering the current limitation. However, if the actual value is $0.48\leq \sin^2θ_{23}\leq 0.54$, it becomes challenging for these two experiments to reject the maximal ($θ_{23}=π/4$) hypothesis and conclude its octant. This octant-blind region can be further explored with the proposed facilities ESSnuSB and a neutrino factory. Accurate determination of the mixing angle $θ_{23}$, as well as the accuracy of $δ_{CP}$, is crucial for examining a certain category of discrete non-Abelian leptonic flavor models. Specifically if CP is conserved in leptonic sector, the combined analysis of Hyper-K and DUNE will rule out the majority of these models. However, if the CP is maximally violated, higher precision of $δ_{CP}$ is necessary for testing these flavor models. |
| title | On Precision of the Leptonic Mixing Angle $θ_{23}$ and its Implications for the Flavor Models |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2409.11824 |