论文标题
非标准的中微子相互作用作为解决NO $ν$ A和T2K差异的解决方案
Non-standard neutrino interactions as a solution to the NO$ν$A and T2K discrepancy
论文作者
论文摘要
两个长基线加速器实验的最新数据没有$ν$ a和t2k，在标准的3风化场景中进行了解释，显示出差异。确定标准CP相$δ_ {\ Mathrm {cp}} $由两个实验提取的不匹配在正常中微子质量排序中很明显。虽然没有$ν$ a优先于$δ_ {\ mathrm {cp}}} \ sim0.8π$，而t2k则标识$δ_ {\ mathrm {cp}}}} \ sim1.4π$的值。这两个估计值分歧超过90美元\％$ c.l。对于2个自由度。我们表明，如果人们假设存在涉及$ e-μ$的风味变化类型的复杂中性非标准相互作用（NSI）或涉及$ e-μ$或$ e-e-τ$扇区的复杂中性非标准相互作用（NSI），则可以解决这种张力。 \ sim | \ varepsilon_ {eτ} | \ sim 0.2 $。值得注意的是，在存在此类NSI的情况下，这两个实验都指向标准CP相$δ_ {\ MathRM {cp}} \ sim3π/2 $的标准CP相值相同的共同值。我们的分析还强调了对非标准扇区中最大CP侵略的有趣偏好，而NSI CP-最适合接近$ ϕ__ {eμ} \ sim ϕ_ {ex ex_ {eτ} \ sim3π/2 $，因此指向虚构的NSI偶数。
The latest data of the two long-baseline accelerator experiments NO$ν$A and T2K, interpreted in the standard 3-flavor scenario, display a discrepancy. A mismatch in the determination of the standard CP-phase $δ_{\mathrm {CP}}$ extracted by the two experiments is evident in the normal neutrino mass ordering. While NO$ν$A prefers values close to $δ_{\mathrm {CP}} \sim 0.8 π$, T2K identifies values of $δ_{\mathrm {CP}} \sim 1.4 π$. Such two estimates are in disagreement at more than 90$\%$ C.L. for 2 degrees of freedom. We show that such a tension can be resolved if one hypothesizes the existence of complex neutral-current non-standard interactions (NSI) of the flavor changing type involving the $e-μ$ or the $e-τ$ sectors with couplings $|\varepsilon_{eμ}| \sim |\varepsilon_{eτ}|\sim 0.2$. Remarkably, in the presence of such NSI, both experiments point towards the same common value of the standard CP-phase $δ_{\mathrm {CP}} \sim 3π/2$. Our analysis also highlights an intriguing preference for maximal CP-violation in the non-standard sector with the NSI CP-phases having best fit close to $ϕ_{eμ} \sim ϕ_{eτ}\sim 3π/2$, hence pointing towards imaginary NSI couplings.
