具有折射质量的中微子与DESI BAO结果
Neutrinos with refractive masses and the DESI BAO results
AI总结：
本文研究具有折射质量的遗迹中微子对宇宙结构形成的影响，发现其在结构形成时期表现为超相对论性零质量粒子，从而调和振荡实验质量值与宇宙学巡天对中微子质量总和的严格限制。
摘要：
由于与暗物质的相互作用，中微子可以获得折射质量，从而解释振荡实验的数据。我们研究了具有折射质量的遗迹中微子对宇宙结构形成的影响。在具有轻费米子媒介粒子的模型中，在高于与媒介粒子质量相关的共振能量 $E_R$ 时，折射质量具有与通常真空质量完全相同的性质。在共振能量以下，折射质量随中微子能量降低而减小，但它们不能以与通常质量相同的方式使用。我们研究了此类中微子的色散关系和群速度及其对红移的依赖性。我们表明，在结构形成时期，对于 $E_R = (10 - 10^5)\,$eV，遗迹中微子是超相对论性的，并且基本上是零质量粒子。这使得从振荡实验提取的质量值与宇宙学巡天对中微子质量总和的严格界限得以协调。
英文摘要：
Due to interactions with dark matter, neutrinos can acquire refractive masses which explain the data from oscillation experiments. We study the effects of relic neutrinos with refractive masses on structure formation in the Universe. In the model with a light fermionic mediator, above the resonance energy, $E_R$, associated with the mass of the mediator, refractive masses have all the properties identical to the usual vacuum masses. Below the resonance, refractive masses decrease with neutrino energy, however, they cannot be used in the same way as usual masses. We study the dispersion relations and group velocities of such neutrinos and their dependence on redshift. We show that in the epoch of structure formation, relic neutrinos were ultrarelativistic and essentially massless particles for $E_R = (10 - 10^5)\,$eV. This allows to reconcile the values of masses extracted from oscillation experiments with the stringent bounds on sum of neutrino masses from cosmological surveys.
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。
