Baksan无菌振荡实验（BEST）的结果

V. V. Barinov; B. T. Cleveland; S. N. Danshin; H. Ejiri; S. R. Elliott; D. Frekers; V. N. Gavrin; V. V. Gorbachev; D. S. Gorbunov; W. C. Haxton; T. V. Ibragimova; I. Kim; Yu. P. Kozlova; L. V. Kravchuk; V. V. Kuzminov; B. K. Lubsandorzhiev; Yu. M. Malyshkin; R. Massarczyk; V. A. Matveev; I. N. Mirmov; J. S. Nico; A. L. Petelin; R. G. H. Robertson; D. Sinclair; A. A. Shikhin; V. A. Tarasov; G. V. Trubnikov; E. P. Veretenkin; J. F. Wilkerson; A. I. Zvir

doi:10.1103/PhysRevLett.128.232501

Baksan无菌振荡实验（BEST）的结果

核实验 2022-06-22 v2 高能物理 - 实验

作者: V. V. Barinov , B. T. Cleveland , S. N. Danshin , H. Ejiri , S. R. Elliott , D. Frekers , V. N. Gavrin , V. V. Gorbachev , D. S. Gorbunov , W. C. Haxton , T. V. Ibragimova , I. Kim , Yu. P. Kozlova , L. V. Kravchuk , V. V. Kuzminov , B. K. Lubsandorzhiev , Yu. M. Malyshkin , R. Massarczyk , V. A. Matveev , I. N. Mirmov , J. S. Nico , A. L. Petelin , R. G. H. Robertson , D. Sinclair , A. A. Shikhin , V. A. Tarasov , G. V. Trubnikov , E. P. Veretenkin , J. F. Wilkerson , A. I. Zvir

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摘要

Baksan无菌振荡实验（BEST）旨在研究先前镓基放射化学测量中观测到的电子中微子 $\nu_{e}$ 亏缺，该现象常被称为\textit{镓异常}，可被解释为 $\nu_e$ 与无菌中微子（ $\nu_s$ ）态之间振荡的证据。一个3.414-MCi \nuc{51}{Cr} $\nu_e$ 源被置于两个嵌套Ga体积的中心，并通过带电流反应\nuc{71}{Ga}( $\nu_e$ ,e $^-\$ )\nuc{71}{Ge}在两个平均距离处测量\nuc{71}{Ge}的产生。内、外靶的测得产生率分别为（ $54.9^{+2.5}_{-2.4}(\mbox{stat})\pm1.4 (\mbox{syst})$ ）与（ $55.6^{+2.7}_{-2.6}(\mbox{stat})\pm1.4 (\mbox{syst})$ ）个\nuc{71}{Ge}/d。各距离处测得的\nuc{71}{Ge}产生率与由已知截面和实验效率预期速率之比（ $R$ ）为 $R_{in}=0.79\pm0.05$ 与 $R_{out}= 0.77\pm0.05$ 。外靶与内靶结果之比为0.97 $\pm$ 0.07，在不确定度内与1一致。各距离处的速率相近，但比预期低20-24%，从而重申了该异常。这些结果与 $\nu_e \rightarrow \nu_s$ 振荡一致，具有相对较大的 $\Delta m^2$ （>0.5 eV $^2$ ）与混合sin $^2 2\theta$ （ $\approx$ 0.4）。

关键词

无菌中微子镓异常 Baksan实验中微子振荡铬-51源放射化学测量

引用

@article{arxiv.2109.11482,
  title  = {Results from the Baksan Experiment on Sterile Transitions (BEST)},
  author = {V. V. Barinov and B. T. Cleveland and S. N. Danshin and H. Ejiri and S. R. Elliott and D. Frekers and V. N. Gavrin and V. V. Gorbachev and D. S. Gorbunov and W. C. Haxton and T. V. Ibragimova and I. Kim and Yu. P. Kozlova and L. V. Kravchuk and V. V. Kuzminov and B. K. Lubsandorzhiev and Yu. M. Malyshkin and R. Massarczyk and V. A. Matveev and I. N. Mirmov and J. S. Nico and A. L. Petelin and R. G. H. Robertson and D. Sinclair and A. A. Shikhin and V. A. Tarasov and G. V. Trubnikov and E. P. Veretenkin and J. F. Wilkerson and A. I. Zvir},
  journal= {arXiv preprint arXiv:2109.11482},
  year   = {2022}
}

备注

Paper updated to final version

Baksan无菌振荡实验（BEST）的结果

摘要

关键词

引用

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