Ledbetter M P, Romalis M V, Kimball D F Jackson
Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA.
Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
Phys Rev Lett. 2013 Jan 25;110(4):040402. doi: 10.1103/PhysRevLett.110.040402. Epub 2013 Jan 23.
A comparison between existing nuclear magnetic resonance measurements and calculations of the scalar spin-spin interaction (J coupling) in deuterated molecular hydrogen yields stringent constraints on anomalous spin-dependent potentials between nucleons at the atomic scale (∼ 1 Å). The dimensionless coupling constant g(P)(p)g(P)(N)/4 π associated with the exchange of pseudoscalar (axionlike) bosons between nucleons is constrained to be less than 3.6 × 10(-7) for boson masses in the range of 5 keV, representing improvement by a factor of 100 over previous constraints. The dimensionless coupling constant g(A)(p)g(A)(N)/4 π associated with the exchange of an axial-vector boson between nucleons is constrained to be g(A)(p)g(A)(N)/4 π<1.3 × 10(-19) for bosons of mass ≲ 1000 eV, improving constraints at this distance scale by a factor of 100 for proton-proton couplings and more than 8 orders of magnitude for neutron-proton couplings.
对氘代分子氢中现有核磁共振测量结果与标量自旋 - 自旋相互作用（J 耦合）计算结果的比较，对原子尺度（约 1 Å）下核子间异常自旋相关势给出了严格限制。对于质量在 5 keV 范围内的赝标量（类轴子）玻色子在核子间交换所关联的无量纲耦合常数 g(P)(p)g(P)(N)/4π，其被限制在小于 3.6×10^(-7)，相较于先前的限制有了 100 倍的改进。对于质量≲1000 eV 的玻色子在核子间交换轴向矢量玻色子所关联的无量纲耦合常数 g(A)(p)g(A)(N)/4π，被限制为 g(A)(p)g(A)(N)/4π < 1.3×10^(-19)，在这个距离尺度上，对于质子 - 质子耦合，限制改进了 100 倍，对于中子 - 质子耦合，改进了超过 8 个数量级。
