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arXiv 2004.13039hep-phastro-ph.COhep-ex
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哈勃张力和规范中微子自相互作用的可重整化模型

The Hubble tension and a renormalizable model of gauged neutrino self-interactions

Maximilian Berbig, Sudip Jana, Andreas Trautner

摘要:

我们提出了一个简单的扩展的标准模型,导致重正化的远程矢量介导的中微子自相互作用。这个模型可以通过延迟复合过程中中微子自由流的开始来解决哈勃张力,而不会与其他测量相冲突。扩展的规范、标量和中微子扇区导致了可观测的特征,包括不可见的希格斯和$Z$衰变,从而将哈勃张力与大型强子对撞机和未来对撞机的精确测量联系起来。该模型有一个新的亲中微子规范玻色子与$m_{Z'}\sim\mathcal{O}(10~\mathrm{eV})$和充电希格斯在几个$100~\mathrm{GeV}$。它需要隐藏中微子的主动-隐藏混合角大于$5\times10^{-4}$,质量在$1\div300\mathrm{eV}$范围内,这也可能对短基线中微子振荡异常起作用。

英文摘要:

We present a simple extension of the Standard Model that leads to renormalizable long-range vector-mediated neutrino self-interactions. This model can resolve the Hubble tension by delaying the onset of neutrino free-streaming during recombination, without conflicting with other measurements. The extended gauge, scalar and neutrino sectors lead to observable signatures, including invisible Higgs and $Z$ decays, thereby relating the Hubble tension to precision measurements at the LHC and future colliders. The model has a new neutrinophilic gauge boson with $m_{Z'}\sim\mathcal{O}(10~\mathrm{eV})$ and charged Higgses at a few $100~\mathrm{GeV}$. It requires hidden neutrinos with active-hidden mixing angles larger than $5\times10^{-4}$ and masses in the range $1\div300\mathrm{eV}$, which could also play a role for short baseline neutrino oscillation anomalies.

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