Speaker
Celso Nishi
(Federal University of ABC)
Description
In Nelson-Barr theories built to solve the strong CP problem, vector-like quarks (VLQs) transmit the spontaneous CP breaking from a scalar sector to the CP conserving version of the SM. We perform the full one-loop matching calculations at the CP breaking scale up to dimension five and partial matching calculations at the VLQ scale to track the relevant corrections to the theta parameter at low energy. We find that the additional dimension five operators indeed induce the RGE running of theta at one-loop. The effect is relevant when the separation between the CP breaking scale and the VLQ scale is large. We discuss some results for simple models, including a version based on non-conventional CP where the contribution at one-loop vanishes.
Authors
Celso Nishi
(Federal University of ABC)
Mr
Gustavo H. S. Alves
(Federal University of ABC)
