MICROSCOPE Mission: First Constraints on the Violation of the Weak Equivalence Principle by a Light Scalar Dilaton
MICROSCOPE Mission: First Constraints on the Violation of the Weak Equivalence Principle by a Light Scalar Dilaton
复制标题
DOI：
10.1103/physrevlett.120.141101
复制
发表时间：
2018-04-02
影响因子：
8.6
通讯作者：
Uzan, Jean-Philippe
中科院分区：
文献类型：
--
作者：
Berge, Joel;Brax, Philippe;Uzan, Jean-Philippe
与弱于引力强度的物质耦合的光或大标量场的存在可能是违反弱等效原理的根源。我们使用 MICROSCOPE 实验对 Eotvos 参数的第一个结果来对此类标量场设置新的约束。对于质量小于 10(-12) eV 的大标量场（即范围大于几个 10(5) m），如果标量场耦合到重子数，我们将现有约束改进一个数量级到垂直条 α 垂直条 < 10(-11)，如果标量场耦合到重子和轻子之间的差异，我们将现有约束改进到垂直条 α 垂直条 < 10(-12)数字。对于光场，我们还考虑了一个描述通用膨胀子与具有五个参数的标准物质场的耦合的模型：我们发现，对于小于 10(-12) eV 的质量，膨胀子耦合参数的约束与之前的等效原理测试相比提高了一个数量级。
The existence of a light or massive scalar field with a coupling to matter weaker than gravitational strength is a possible source of violation of the weak equivalence principle. We use the first results on the Eotvos parameter by the MICROSCOPE experiment to set new constraints on such scalar fields. For a massive scalar field of mass smaller than 10(-12) eV (i.e., range larger than a few 10(5) m), we improve existing constraints by one order of magnitude to vertical bar alpha vertical bar < 10(-11) if the scalar field couples to the baryon number and to vertical bar alpha vertical bar < 10(-12) if the scalar field couples to the difference between the baryon and the lepton numbers. We also consider a model describing the coupling of a generic dilaton to the standard matter fields with five parameters, for a light field: We find that, for masses smaller than 10(-12) eV, the constraints on the dilaton coupling parameters are improved by one order of magnitude compared to previous equivalence principle tests.