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arXiv 2101.03555hep-ph
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从相对论性方程推导出的新CP相位与Dirac中微子的精确振荡概率

New CP Phase and Exact Oscillation Probabilities of Dirac Neutrino derived from Relativistic Equation

Keiichi Kimura, Akira Takamura

AI总结:

基于Dirac方程而非Schrödinger方程推导中微子振荡概率,发现振荡概率不仅依赖质量平方差还取决于绝对质量,并出现新CP相位,这些效应仅在原子尺度可探测,不影响常规实验。

摘要:

我们提出了一种相对论性地推导中微子振荡概率的新表述,它不基于Schrödinger方程,而是基于Dirac方程。在两代模型的背景下,我们在仅存在Dirac质量项的场景下精确计算了振荡概率。我们的分析揭示了基于Dirac方程推导出的振荡概率中出现的两个新特征。第一个特征是振荡概率取决于中微子质量的绝对值。虽然通常假设振荡概率仅取决于质量平方差,但我们表明它们也取决于绝对质量。第二个特征是新CP相位的出现。如果存在能够区分超出标准模型物理学中右手中微子味道的相互作用,我们甚至可能在两代模型中观察到这个新CP相位。我们讨论了通过原子尺度的中微子振荡探测这些特征贡献的可行性。相比之下,这些效应在常规的短基线和长基线实验中可以忽略不计,且与先前的发现不产生矛盾。

英文摘要:

We present a new formulation for deriving neutrino oscillation probabilities relativistically, based not on the Schrödinger equation but on the Dirac equation. In the context of two generations, we calculate the oscillation probabilities precisely in a scenario where only the Dirac mass term is present. Our analysis reveals the emergence of two new features in the oscillation probabilities derived from the Dirac equation. The first feature is that the oscillation probabilities depend on the absolute value of the neutrino mass. While it has generally been assumed that oscillation probabilities depend solely on mass squared differences, we show that they also depend on the absolute mass. The second feature is the emergence of a new CP phase. If interactions exist that can distinguish the flavors of right-handed neutrinos in physics beyond the Standard Model, we could potentially observe this new CP phase even in the two-generation model. We discuss the feasibility of detecting the contributions of these features through neutrino oscillations at atomic scales. In contrast, these effects are negligible in conventional short- and long-baseline experiments, and no contradictions arise with previous findings.

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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