Muon Anomaly and Dark Parity Violation

被引：104

作者：

Davoudiasl, Hooman ^{[1
]}

Lee, Hye-Sung ^{[1
]}

Marciano, William J. ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 03期

基金：

美国能源部;

关键词：

MOLLER SCATTERING ASYMMETRIES; ATOMIC CESIUM; RADIATIVE-CORRECTIONS; STANDARD MODEL; NONCONSERVATION; PHYSICS;

D O I：

10.1103/PhysRevLett.109.031802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The muon anomalous magnetic moment exhibits a 3.6 sigma discrepancy between experiment and theory. One explanation requires the existence of a light vector boson, Z(d) (the dark Z), with mass 10-500 MeV that couples weakly to the electromagnetic current through kinetic mixing. Support for such a solution also comes from astrophysics conjectures regarding the utility of a U(1)(d) gauge symmetry in the dark matter sector. In that scenario, we show that mass mixing between the Z(d) and ordinary Z boson introduces a new source of "dark'' parity violation, which is potentially observable in atomic and polarized electron scattering experiments. Restrictive bounds on the mixing (m(Zd)/m(Z))delta are found from existing atomic parity violation results, delta(2) < 2 x 10(-5). Combined with future planned and proposed polarized electron scattering experiments, a sensitivity of delta(2) x 10(-6) is expected to be reached, thereby complementing direct searches for the Z(d) boson.

引用

页数：5

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