New measurements of the flux and spectrum of reactor antineutrinos as functions of the distance from the center of the core of the SM-3 reactor (Dimitrovgrad, Russia) in the range of 6–12 m have been reported. Additional measurements have been performed. The amount of experimental data has been increased by almost a factor of 2. The model-independent analysis has been performed in order to determine the oscillation parameters \(\Delta m_{14}^2\) and sin² 2θ₁₄. The method of coherent addition of measurement results allows the direct demonstration of the effect of oscillations. The effect of oscillations is observed near the values \(\Delta m_{14}^2 = 7.25 \pm {0.13_{{\rm{st}}}} \pm {1.08_{{\rm{sys}}}}\) and sin² 2θ = 0.26 ± 0.08_stat ± 0.05_syst. This result has been compared to the results of other experiments on the search for the sterile neutrino. The joint analysis of the Neutrino -4 experiment with the gallium and reactor anomalies gives the value sin² 2θ₁₄ ≈ 0.19 ± 0.04 (4.6σ). The results of the Neutrino-4 experiment have been compared to the results of the NEOS, DANSS, STEREO, and PROSPECT reactor experiments; MiniBooNE and LSND accelerator experiments; and IceCube experiment. According to the Neutrino-4 experiment (under the assumption that \(m_4^2 \approx \Delta m_{14}^2\)), the mass of the sterile neutrino is m₄ = (2.68 ± 0.13) eV. The calculations with the estimates of the mixing angles from other experiments give the values \(m_{{V_e}}^{{\rm{eff}}} = (0.58 \pm 0.09)\;{\rm{eV}}\), \(m_{{V_\mu}}^{{\rm{eff}}} = (0.42 \pm 0.24)\;{\rm{eV}}\), and \(m_{{V_\tau}}^{{\rm{eff}}} \le 0.65\;{\rm{eV}}\) for the masses of the electron, muon, and tau neutrinos, respectively. The extended Pontecorvo—Maki—Nakagawa—Sakata matrix for the 3 + 1 model with one sterile neutrino is given.

据报道，反应堆中微子通量和光谱的新测量值是与SM-3反应堆中心（俄罗斯迪米特罗夫格勒）中心距离在6-12 m之间的函数。已执行其他测量。实验数据的量已经增加了近一个的2因子的模型无关的分析，以便确定参数振荡被执行\（\德尔塔M_ {14} ^ 2 \）和sin ² 2θ ₁₄。相干相加的测量结果的方法可以直接演示振荡的影响。在值\（\ Delta m_ {14} ^ 2 = 7.25 \ pm {0.13 _ {{\ rm {st}}}} \ pm {1.08 _ {{\ rm {sys}}}附近观察到振荡的影响} \）和罪²2θ= 0.26±0.08 _STAT ±0.05 _SYST。将该结果与寻找无菌中微子的其他实验结果进行了比较。中微子-4实验与镓和反应器异常的联合分析给出了值sin ² 2θ ₁₄ ≈0.19±0.04（4.6σ）。已将Neutrino-4实验的结果与NEOS，DANSS，STEREO和PROSPECT反应器实验的结果进行了比较；MiniBooNE和LSND加速器实验；和IceCube实验。根据Neutrino-4实验（在\（m_4 ^ 2 \ approx \ Delta m_ {14} ^ 2 \的假设下），无菌中微子的质量为m ₄=（2.68±0.13）eV。根据其他实验对混合角的估计进行的计算得出值\（m _ {{V_e}} ^ {{\ rm {eff}}} =（0.58 \ pm 0.09）\; {\ rm {eV}} \ ），\（m _ {{V_ \ mu}} ^ {{\ rm {eff}}} =（0.42 \ pm 0.24）\; {\ rm {eV}} \）和\（m _ {{V_ \ tau }} ^ {{\ rm {eff}}} \ le 0.65 \; {\ rm {eV}} \\）分别代表电子，μ子和tau中微子的质量。给出了带有一个无菌中微子的3 + 1模型的扩展Pontecorvo-Maki-Nakagawa-Sakata矩阵。