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通过太阳中微子研究探索非标准夸克相互作用

Exploring nonstandard quark interactions through solar neutrino studies

Ilídio Lopes

备注：
9 pages and 5 figures
发表信息：
Physical Review D 108, 035028 (2023)
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AI总结：

本研究通过太阳中微子数据评估非标准相互作用（NSI）模型，发现$ζ_o$在-0.7至0.002范围内与数据吻合，最佳拟合$χ^2_ν$为2.96，优于标准模型，暗示新相互作用的存在。

摘要：

我们研究了粒子物理标准模型的非标准相互作用（NSI）扩展对太阳中微子味振荡的影响。该NSI模型通过一个与光子混合的$Z^\prime$玻色子引入$U_{Z^\prime}(1)$规范对称性，通过一个独特的与上夸克和下夸克的耦合，在活跃中微子和物质场之间产生中性流。该相互作用由一个单一参数$ζ_o$定义，该参数与$Z^\prime$玻色子的质量$m_{Z^\prime}$和耦合常数$g_{Z^\prime}$相关。值得注意的是，该模型放宽了相干弹性中微子-核散射实验的约束，并拟合了μ子反常磁偶极矩的实验值。在本研究中，我们利用太阳中微子测量和最新的标准太阳模型来评估中微子味振荡，并评估对$ζ_o$的约束。我们的研究表明，当$ζ_o$在$-0.7$到$0.002$之间时，NSI模型与当前太阳中微子数据一致。这些模型的$χ^2_ν$值等于或优于标准中微子味振荡模型，后者$χ^2_ν$为3.12。最佳NSI模型的$ζ_o$值为-0.2，$χ^2_ν$为2.96。在我们的分析中加入来自Darwin实验的额外数据，将$ζ_o$值的范围从$-0.7$到$0.002$缩小到$-0.5$到$-0.002$。这些结果暗示了可能存在新相互作用，因为与主流的标准中微子味振荡模型相比，NSI模型在拟合太阳中微子数据方面达到了相当或更优的效果。

英文摘要：

We investigate the effects of a Non-Standard Interaction (NSI) extension of the standard model of particle physics on solar neutrino flavour oscillations. This NSI model introduces a $U_{Z^\prime}(1)$ gauge symmetry through a $Z^\prime$ boson that mixes with the photon, creating a neutral current between active neutrinos and matter fields via a unique coupling to up and down quarks. The interaction is defined by a single parameter, $ζ_o$, which is related to the $Z^\prime$ boson's mass $m_{Z^\prime}$ and coupling constant $g_{Z^\prime}$. Notably, this model relaxes the bounds on Coherent Elastic Neutrino-Nucleus Scattering experiments and fits the experimental values of the anomalous magnetic dipole moment of the muon. In this study, we use solar neutrino measurements and an up-to-date standard solar model to evaluate the neutrino flavour oscillations and assess the constraints on $ζ_o$. Our study indicates that the NSI model aligns with the current solar neutrino data when $ζ_o$ is between $-0.7$ and $0.002$. These models have $χ^2_ν$ values equal to or better than the standard neutrino flavor oscillation model, which stands at a $χ^2_ν$ of 3.12. The best NSI model comes with a $ζ_o$ value of -0.2 and a $χ^2_ν$ of 2.96. Including extra data from the Darwin experiment in our analysis refines the range of $ζ_o$ values from $-0.7$ to $0.002$, down to $-0.5$ to $-0.002$. These results hint at the possible existence of novel interactions, given that NSI models achieve a comparable or superior fit to the solar neutrino data when contrasted with the prevailing standard model of neutrino flavour oscillation.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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