T violation at a future neutrino factory
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866909431948640256 |
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| author | Kitano, Ryuichiro Sato, Joe Sugama, Sho |
| author_facet | Kitano, Ryuichiro Sato, Joe Sugama, Sho |
| contents | We study the possibility of measuring T (time reversal) violation in a future long baseline neutrino oscillation experiment. By assuming a neutrino factory as a staging scenario of a muon collider at the J-PARC site, we find that the $ν_e \to ν_μ$ oscillation probabilities can be measured with a good accuracy at the Hyper-Kamiokande detector. By comparing with the probability of the time-reversal process, $ν_μ \to ν_e$, measured at the T2K/T2HK experiments, one can determine the CP phase $δ$ in the neutrino mixing matrix if $| \sin(δ)|$ is large enough. The determination of $δ$ can be made with poor knowledge of the matter density of the earth as T violation is almost insensitive to the matter effects. The comparison of CP and T-violation measurements, ${\it à\ la}$ the CPT theorem, provides us with a non-trivial check of the three neutrino paradigm based on the quantum field theory. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_05807 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | T violation at a future neutrino factory Kitano, Ryuichiro Sato, Joe Sugama, Sho High Energy Physics - Phenomenology High Energy Physics - Experiment We study the possibility of measuring T (time reversal) violation in a future long baseline neutrino oscillation experiment. By assuming a neutrino factory as a staging scenario of a muon collider at the J-PARC site, we find that the $ν_e \to ν_μ$ oscillation probabilities can be measured with a good accuracy at the Hyper-Kamiokande detector. By comparing with the probability of the time-reversal process, $ν_μ \to ν_e$, measured at the T2K/T2HK experiments, one can determine the CP phase $δ$ in the neutrino mixing matrix if $| \sin(δ)|$ is large enough. The determination of $δ$ can be made with poor knowledge of the matter density of the earth as T violation is almost insensitive to the matter effects. The comparison of CP and T-violation measurements, ${\it à\ la}$ the CPT theorem, provides us with a non-trivial check of the three neutrino paradigm based on the quantum field theory. |
| title | T violation at a future neutrino factory |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2407.05807 |