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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.11892 |
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| _version_ | 1866909358582923264 |
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| author | Hamaguchi, Koichi Hor, Shihwen Nagata, Natsumi Takahashi, Hiroki |
| author_facet | Hamaguchi, Koichi Hor, Shihwen Nagata, Natsumi Takahashi, Hiroki |
| contents | In flipped SU(5) grand unified theories, the partial decay lifetimes of certain nucleon decay channels depend generically on an unknown unitary matrix, which arises when left-handed lepton fields are embedded into anti-fundamental representations of SU(5). This dependency is particularly relevant when the neutrino mass matrix has a generic structure, introducing uncertainty in the prediction of nucleon decay branching fractions within flipped SU(5). In this paper, we demonstrate that this uncertainty can be parametrized using two parameters, which can be determined by measuring the partial lifetimes of $p \to π^0 e^+$, $p \to π^0 μ^+$, and $n \to π^0 \barν$. In addition, we establish upper limits on the ratios of the decay widths of these channels, offering a potential method to test flipped SU(5) in future nucleon decay experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_11892 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A Generic Analysis of Nucleon Decay Branching Fractions in Flipped SU(5) Grand Unification Hamaguchi, Koichi Hor, Shihwen Nagata, Natsumi Takahashi, Hiroki High Energy Physics - Phenomenology High Energy Physics - Experiment In flipped SU(5) grand unified theories, the partial decay lifetimes of certain nucleon decay channels depend generically on an unknown unitary matrix, which arises when left-handed lepton fields are embedded into anti-fundamental representations of SU(5). This dependency is particularly relevant when the neutrino mass matrix has a generic structure, introducing uncertainty in the prediction of nucleon decay branching fractions within flipped SU(5). In this paper, we demonstrate that this uncertainty can be parametrized using two parameters, which can be determined by measuring the partial lifetimes of $p \to π^0 e^+$, $p \to π^0 μ^+$, and $n \to π^0 \barν$. In addition, we establish upper limits on the ratios of the decay widths of these channels, offering a potential method to test flipped SU(5) in future nucleon decay experiments. |
| title | A Generic Analysis of Nucleon Decay Branching Fractions in Flipped SU(5) Grand Unification |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2407.11892 |