论文标题
哈勃张力可以指向中微子质量机制吗？
Could the Hubble Tension be Pointing Towards the Neutrino Mass Mechanism?
论文作者
论文摘要
哈勃常数的局部测量目前不同意在$λ$ CDM宇宙学假设下从CMB推断出的高精度值。这种张力的重要性显然激发了研究能够解决这一杰出问题的标准宇宙学模型的扩展。从广义上讲，成功地减少CMB和局部测量之间的张力的模型（不在其他数据集中引入额外的张力）需要在接近重组的时间中的宇宙中额外的能量密度。 在这项贡献中，我将表明，Maporon（由全球Lepton数字对称性的自发断裂，通常与中微子质量机制有关的伪石玻色子，可以帮助减少哈勃张力。重要的是，我还将表明，当前的CMB观测值可以限制中微子-majoron耦合的小至$ 10^{ - 13} $，在类型I SEESAW机构中，Lepton数字的尺度与$ \ sim 1 \，\ sim 1 \，\ text {tev} $相对应。
Local measurements of the Hubble constant currently disagree with the high-precision value that is inferred from the CMB under the assumption of a $Λ$CDM cosmology. The significance of this tension clearly motivates studying extensions of the standard cosmological model capable of addressing this outstanding issue. Broadly speaking, models that have been successful in reducing the the tension between the CMB and local measurements (without introducing additional tension in other datasets) require an additional component of the energy density in the Universe at a time close to recombination. In this contribution, I will show that the Majoron -- a pseudo-Goldstone boson arising from the spontaneous breaking of a global lepton number symmetry and often associated with the neutrino mass mechanism -- can help to reduce the Hubble tension. Importantly, I will also show that current CMB observations can constrain neutrino-Majoron couplings as small as $10^{-13}$, which within the type-I seesaw mechanism correspond to scales of lepton number breaking as high as $\sim 1\,\text{TeV}$.
