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| 作者 | Lin, Chilong |
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| 出版日期 | 202511 |
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| 著作名稱 | Top-Down Analysis of Leptogenesis and Dirac Neutrino Masses in an Extended CP-Violating Standard Model
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| 刊名 | symmetry |
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| 卷 | 17 |
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| 期 | 11 |
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| 頁數 | 1888 |
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| 被收錄索引 | SCI |
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| 主題 | 物理;物理 |
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| 關鍵字 | neutrino masses; leptogenesis; baryogenesis; CP-violating Standard Model; baryon asymmetry of the universe; charge-parity violation; SN symmetry; fermion masses degeneracy |
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| 摘要 | We analytically investigate the charge parity (CP) violation, neutrino masses, and leptogenesis in the Standard Model (SM) with an extension to Dirac neutrinos, building on our previous quark sector analysis.
Using systematic top-down diagonalization of fermion mass matrices and experimental neutrino mass-squared differences, we predict the complete neutrino mass spectrum and assess leptogenesis viability.
We find that our analysis yields specific mass predictions: ＄m_h \approx 5.01 \times 10^{-2} ＄ eV, ＄m_l \approx 6.09 \times 10^{-3}＄ eV,
and a bimodal middle mass (＄m_m \approx 4.97 \times 10^{-2}＄ eV for inverted ordering,
＄m_m \approx 1.05 \times 10^{-2} ＄ eV for normal ordering).
Four viable scenarios emerge with parameter constraints ranging from highly restrictive (＄1 < g < 1.01512＄) to moderately broad (＄1 < g < 5.9 ＄).
Crucially, Dirac neutrino leptogenesis is about 71 orders of magnitude weaker than baryogenesis,
indicating that Standard Model leptogenesis is negligible and Beyond Standard Model physics is needed for significant leptogenesis contributions.
CP violation emerges through ＄S_N＄ symmetry breaking, with mass degeneracies controlled by model parameters.
Remarkably, while mass-squared differences are small, individual neutrino masses can be significantly larger,
potentially addressing dark matter mass requirements and enhancing cosmological significance.
This work provides testable predictions for neutrino experiments and establishes a unified analytical approach to CP violation across fermion sectors. |
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| 資料連結 | ![Full Text]() |
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| DOI | https://doi.org/10.3390/sym17111888 |
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| 系統號 | NO000007433 |
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