A flipped $U(1)_R$ extension of the Standard Model
Abstract
In this work, we study an extension of the Standard Model (SM) based on the gauge symmetry $SU(3)_C\times SU(2)_L\times U(1)_{Y'}\times U(1)_R$ where only the righthanded fermions have nonzero $U(1)_R$ charge and the $U(1)_Y$ weak hypercharge of the SM is identified as a combination of the $U(1)_{Y'}$ and $U(1)_R$ charges. The gauge charge assignment of the fields is constrained by the conditions of the anomaly cancellation and the gauge invariance of the Yukawa couplings. The light neutrino masses are generated via the typeI seesaw mechanism where the Majorana masses of the righthanded neutrinos are related to the $U(1)_{Y'}\times U(1)_R$ symmetry breaking scale. Then, we discuss the constraints on the free parameters of the model from the various current experiments, such as precision measurement of the total $Z$ width, $\rho$ parameter, atomic parity violation of Cesium, LEP and LHC bounds. In addition, we investigate the potential of probing for the signal of the new neutral gauge boson based on the forwardbackward asymmetry for the process $e^+e^\rightarrow\mu^+\mu^$ which is the most sensitive mode at ILC.
 Publication:

arXiv eprints
 Pub Date:
 December 2019
 arXiv:
 arXiv:1912.12595
 Bibcode:
 2019arXiv191212595N
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 22 pages, 12 figures