Atomic parity violation in cesium and implications for the 3 - 3 - 1 models

Abstract

The parity violation in cesium atom is analysed in the framework of the models based on the SU(3)_C X SU(3)_L X U(1)_N gauge group. It is shown that in the minimal version, the main contribution to a deviation of weak charge ΔQ_W due to direct Z' exchange is negative. New data on parity violation in the cesium atom seems not favour to the minimal version, while it gets a positive value in the version with right-handed neutrinos. We obtain a bound on the $Z^{\prime }$ mass at a range from 1.4 TeV to 2.6 TeV. The allowed regions for the Z-Z'$mixing angle are also derived.

arXiv comment7 pages, Journal version

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• S, T, U parameters in $SU(3{)}_C\times SU(3{)}_L\times U(1)$ model with right-handed neutrinos
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• Constraining heavy neutral gauge boson $Z^{\prime }$ in the 3 - 3 - 1 models by weak charge data of Cesium and proton
• Bilepton production in electron-gamma collisions
• Single Z' production at CLIC based on e^- gamma collisions
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