论文标题
大爆炸核合成中中微子量表非标准相互作用的界限
Bounds on neutrino-scalar nonstandard interactions from big bang nucleosynthesis
论文作者
论文摘要
中微子量表非标准相互作用（SNSI）的相干向前散射过程会引起有效的中微子质量。在早期的宇宙中，大型中微子有效质量限制了中微子的产生。 SNSI效应由两个有效的耦合调节，这些解释是中微子和电子/正面之间的耦合，$ g _ {\ rm eff} $和中微子自我互动，$ g _ {\ rm s} $。这些参数与相对论物种的有效数量直接相关，而非零值则意味着比预期的$ n _ {\ rm eff} $小。我们采用大爆炸核合成来限制SNSI效应。我们发现$ g _ {\ rm eff} <1.2 $ mev $^{ - 2} $和$ g _ {\ rm s} <2.0 \ times 10^{7} $ mev $^{ - 2} $在68 \％cl。对于范围内的标量质量$ 10^{ - 15} {\ rm ev} \ lyseSim m_ϕ \ lyseSim 10^{ - 5} {\ rm ev} $，我们的中微子量表耦合约束比以前的任何结果更具限制性。
Coherent forward scattering processes by neutrino-scalar nonstandard interactions (SNSI) induce an effective neutrino mass. In the Early Universe, a large neutrino effective mass restricts the production of neutrinos. The SNSI effect is modulated by two effective couplings, these account for the coupling between neutrinos and electrons/positrons, $G_{\rm eff}$, and the neutrino self-interaction, $G_{\rm S}$. These parameters are directly related to the effective number of relativistic species and non-zero values imply a smaller than expected $N_{\rm eff}$. We employ big bang nucleosynthesis to constraint the SNSI effect. We find that $ G_{\rm eff }< 1.2$ MeV$^{-2}$ and $ G_{\rm S }< 2.0 \times 10^{7}$ MeV$^{-2}$ at 68\% CL. For a scalar mass in the range $10^{-15} {\rm eV}\lesssim m_ϕ\lesssim 10^{-5}{\rm eV}$, our neutrino-scalar coupling constraint is more restrictive than any previous result.
