Search for exotic spin-dependent couplings of the neutron with matter using spin-echo based neutron interferometry
Search for exotic spin-dependent couplings of the neutron with matter using spin-echo based neutron interferometry
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DOI：
10.1103/physrevd.101.122002
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发表时间：
2020-06
影响因子：
5
通讯作者：
S. Parnell;A. A. van Well-A.;J. Plomp;R. Dalgliesh;N. Steinke;J. Cooper;N. Geerits;K. Steffen
中科院分区：
文献类型：
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作者：
S. Parnell;A. A. van Well-A.;J. Plomp;R. Dalgliesh;N. Steinke;J. Cooper;N. Geerits;K. Steffen
标准模型之外的各种理论预测新粒子的质量在亚电子伏特范围内，与普通物质的耦合非常弱，可以与电子和核子进行自旋相关的耦合。我们报告空结果的搜索可能的异国情调的自旋相关的耦合的中子，这可能是由交换轻弱耦合玻色子或自旋重力耦合进行自旋回波中子谱仪。我们约束的产品GA2和gAgV的轴向矢量耦合的中子地球的物质，通过交换的弱耦合矢量玻色子的力范围之间的米尺度和地球的半径。我们还限制了一些奇异自旋引力耦合理论中的常数。
Various theories beyond the Standard Model predict new particles with masses in the sub-eV range with very weak couplings to ordinary matter which can possess spin-dependent couplings to electrons and nucleons. We report null results of a search for possible exotic spin-dependent couplings of the neutron which could be induced by the exchange of light weakly coupled bosons or spin-gravity coupling conducted using a spin-echo neutron spectrometer. We constrain the products gA2 and gAgV of the axial vector coupling of the neutron to the matter of the Earth through the exchange of a weakly coupled vector boson for force ranges between the metre scale and the radius of the Earth. We also constrain the constants in some theories of exotic spin-gravity couplings.