Search for a Permanent Electric Dipole Moment of the Mercury Atom

被引：0

作者：

Fortson, E. N. ^{[1
]}

机构：

[1] Univ Washington, Dept Phys, Seattle, WA 98195 USA

来源：

INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS | 2009年 / 1182卷

关键词：

Electric Dipole Moment; Time-reversal; CP-violaton; Standard Model; Optical Pumping; MESON SYSTEM; CP VIOLATION; LIMIT;

D O I：

暂无

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

There has been exciting progress in recent years in the search for a permanent electric dipole moment (EDM) of an atom, a molecule, or the neutron. An EDM along the axis of spin can exist only if time reversal symmetry (T) is violated. Although such a dipole has not yet been detected, mainstream theories of possible new physics, such as Supersymmetry, predict the existence of EDMs within reach of modern experiments. Here I discuss the results of our new experimental search for a permanent electric dipole moment of Hg-199 utilizing a stack of four vapor cells. We find d (Hg-199) = (0.49 +/- 1.29(stat) +/- 0.76(syst)) x 10(-29) e cm, and interpret this as a new upper bound, d(Hg-199) < 3.1 x 10(-29) e cm (95% CL.). This result improves our previous Hg-199 limit by a factor of 7, and can be used to set new constraints on CP violation in physics beyond the Standard Model.

引用

页码：629 / 634

页数：6

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