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arXiv 2602.07136hep-ph
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辐射锯齿模型与重子数 violation 及中子-反中子转换时间上限

Radiative Seesaw Model with Baryon Number Violation and Upper Limit on Neutron-anti-Neutron Transition Time

University of Maryland, College Park(马里兰大学帕克分校);Department of Physics, University of Alabama, Tuscaloosa(阿拉巴马大学塔斯卡卢萨分校物理系)

Rabindra N. Mohapatra, Nobuchika Okada

AI总结:

该研究提出通过辐射锯齿机制产生中微子质量,并探讨非热性RHN产生对中子-反中子转换时间上限的影响,为物质起源提供新途径。

摘要:

最小的scotogenic模型中,通过辐射锯齿机制产生微小中微子质量,已知能够为中微子质量和物质起源提供统一框架。然而如果宇宙再加热温度低于sphaleron再加热温度,则leptogenesis失效,一种理解物质起源的方法是添加涉及右手 neutrino (RHN) $N$ 的有效相互作用,形式为$\frac{1}{Λ^2}N u_Rd_Rd_R$。该模型可以导致可观测的中子-反中子(n-$\ar{n}$)振荡。我们展示如果RHN非热性产生,我们可以得到宇宙学上中子-反中子转换时间$τ_{n-\ar{n}}$的上限,这在计划中的ESS HIBEAM/NNBAR实验范围内。质子稳定性由scotogenic $Z_2$ 不变性保证,这防止了中微子的Dirac质量项出现。

英文摘要:

The minimal scotogenic model where small neutrino masses arise via radiative seesaw, is known to provide a unified framework for neutrino mass and origin of matter via leptogenesis. However if the inflation reheat temperature of the universe is below the sphaleron reheating temperature, then leptogenesis fails and one way to understand the origin of matter would be to add an effective interaction involving the right handed neutrino (RHN) $N$ of the form $\frac{1}{Λ^2}N u_Rd_Rd_R$. This model can lead to observable neutron-anti-neutron ($n-\bar{n}$) oscillation. We show that if RHNs are produced non-thermally, we can get a cosmological upper limit on the transition time $τ_{n-\bar{n}}$, which is within the reach of the planned ESS HIBEAM/NNBAR experiment. The proton stability is guaranteed by the scotogenic $Z_2$ invariance, which prevents the appearance of the Dirac mass term for the neutrino

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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