Measurement of the permanent electric dipole moment of the 129Xe atom

被引：42
|
作者：
Allmendinger, F. [1 ]
Engin, I [2 ]
Heil, W. [3 ]
Karpuk, S. [3 ]
Krause, H-J [4 ]
Niederlaender, B. [3 ]
Offenhaeusser, A. [4 ]
Repetto, M. [3 ]
Schmidt, U. [1 ]
Zimmer, S. [1 ]
机构：
[1] Ruprecht Karls Univ Heidelberg, Phys Inst, D-69120 Heidelberg, Germany
[2] Forschungszentrum Julich, PGI 6, D-52425 Julich, Germany
[3] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
[4] Forschungszentrum Julich, ICS 8, D-52425 Julich, Germany
来源：
PHYSICAL REVIEW A | 2019年 / 100卷 / 02期
关键词：
SPIN-POLARIZED HE-3; MAGNETIC-RESONANCE; FIELD; RELAXATION; PHASE;
D O I：
10.1103/PhysRevA.100.022505
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report on a measurement of the CP-violating permanent electric dipole moment (EDM) of the neutral Xe-129 atom. Our experimental approach is based on the detection of the free precession of co-located nuclear spin-polarized He-3 and Xe-129 samples. The EDM measurement sensitivity benefits strongly from long spin coherence times of several hours achieved in diluted gases and homogeneous weak magnetic fields of about 400 nT. A finite EDM is indicated by a change in the precession frequency, as an electric field is periodically reversed with respect to the magnetic guiding field. Our result (-4.7 +/- 6.4) x 10(-28)e cm, is consistent with zero and is used to place a new upper limit on the Xe-129 EDM: vertical bar d(Xe)vertical bar < 1.5 x 10(-27) e cm (95% C.L.). We also discuss the implications of this result for various CP-violating observables as they relate to theories of physics beyond the standard model.
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页数：19
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