论文标题
光QCD计算光无菌中微子的贡献$ 0 \nu2β$ decay
Lattice QCD calculation of light sterile neutrino contribution in $0\nu2β$ decay
论文作者
论文摘要
我们提出了涉及轻型无菌中微子的中微子双β衰减的晶格QCD研究。计算使用$ 2+1 $ - 含有域墙壁费米子生成的五个量规合奏在物理派质量质量上进行。我们获得低能常数$ g _ {\ text {lr}}^{ππ}（m_ν）$，带有中微子质量$m_ν$从$ 0 $ gev到$ 3 $ gev。晶格结果与先前的插值方法相当一致，该方法在小$m_ν$上具有$ \ sim20 \％$偏差。我们对中微子质量的差异提供了解释。在大$m_ν$上，我们的结果与以前的晶格确定$ g_ {4}^{ππ}（μ）$之间的良好一致性在$μ=m_ν= 3 $ gev中找到。
We present a lattice QCD study of the neutrinoless double beta decay involving light sterile neutrinos. The calculation is performed at physical pion mass using five gauge ensembles generated with the $2+1$-flavor domain wall fermions. We obtain the low-energy constants $g_{\text{LR}}^{ππ}(m_ν)$ with the neutrino mass $m_ν$ from $0$ GeV to $3$ GeV. The lattice results are reasonably consistent with the previous interpolation method with a $\sim20\%$ deviation at small $m_ν$. We provide an explanation on the discrepancy at vanishing neutrino mass. At large $m_ν$, a good consistence between our results and the previous lattice determination of $g_{4}^{ππ}(μ)$ is found at $μ=m_ν=3$ GeV.
