# ϵ′/ϵ anomaly and neutron EDM in SU(2) L × SU(2) R × U(1)B−L model with charge symmetry

Journal of High Energy Physics, May 2018

Abstract The Standard Model prediction for ϵ′/ϵ based on recent lattice QCD results exhibits a tension with the experimental data. We solve this tension through W R + gauge boson exchange in the SU(2) L × SU(2) R × U(1)B−L model with ‘charge symmetry’, whose theoretical motivation is to attribute the chiral structure of the Standard Model to the spontaneous breaking of SU(2) R × U(1)B−L gauge group and charge symmetry. We show that ${M_W}_{{}_R}<58$ TeV is required to account for the ϵ′/ϵ anomaly in this model. Next, we make a prediction for the neutron EDM in the same model and study a correlation between ϵ′/ϵ and the neutron EDM. We confirm that the model can solve the ϵ′/ϵ anomaly without conflicting the current bound on the neutron EDM, and further reveal that almost all parameter regions in which the ϵ′/ϵ anomaly is explained will be covered by future neutron EDM searches, which leads us to anticipate the discovery of the neutron EDM.

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Naoyuki Haba, Hiroyuki Umeeda, Toshifumi Yamada. ϵ′/ϵ anomaly and neutron EDM in SU(2) L × SU(2) R × U(1)B−L model with charge symmetry, Journal of High Energy Physics, 2018, 52, DOI: 10.1007/JHEP05(2018)052