"Dark" Z implications for parity violation, rare meson decays, and Higgs physics

被引：221

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 D | 2012年 / 85卷 / 11期

基金：

美国能源部;

关键词：

RADIATIVE-CORRECTIONS; BOSON; TEV;

D O I：

10.1103/PhysRevD.85.115019

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

General consequences of mass mixing between the ordinary Z boson and a relatively light Z(d) boson, the "dark" Z, arising from a U(1)(d) gauge symmetry, associated with a hidden sector such as dark matter, are examined. New effects beyond kinetic mixing are emphasized. Z-Z(d) mixing introduces a new source of low energy parity violation well explored by possible future atomic parity violation and planned polarized electron scattering experiments. Rare K(B) meson decays into pi(K) l(+)l(-) (l = e, mu) and pi(K) v (v) over bar are found to already place tight constraints on the size of Z-Z(d) mixing. Those sensitivities can be further improved with future dedicated searches at K and B factories as well as binned studies of existing data. Z-Z(d) mixing can also lead to the Higgs decay H -> ZZ(d), followed by Z -> l(1)(+)l(1)(-) and Zd -> l(2)(+)l(2)(-) or "missing energy," providing a potential hidden sector discovery channel at the Large Hadron Collider. An illustrative realization of these effects in a 2 Higgs doublet model is presented.

引用

页数：12

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