%0 Journal Article
%T Dark-sector seeded solution to the strong CP problem
%A Câmara, H. B.
%A Joaquim, F. R.
%A Valle, J. W. F.
%J Physical Review D
%D 2023
%V 108
%N 9
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Camara_etal2023
%O WOS:001115232100004
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5840), last updated on Tue, 19 Dec 2023 08:04:49 +0000
%X We propose a novel realization of the Nelson-Barr mechanism "seeded" by a dark sector containing scalars and vectorlike quarks. Charge parity (CP) and a Z8 symmetry are spontaneously broken by the complex vacuum expectation value of a singlet scalar, leaving a residual Z2 symmetry that stabilizes dark matter (DM). A complex Cabibbo-Kobayashi-Maskawa matrix arises via one-loop corrections to the quark mass matrix mediated by the dark sector. In contrast with other proposals where nonzero contributions to the strong CP phase arise at the one-loop level, in our case this occurs only at two loops, enhancing naturalness. Our scenario also provides a viable weakly interacting massive particle scalar DM candidate.
%R 10.1103/PhysRevD.108.095003
%U https://arxiv.org/abs/2303.00705
%U https://doi.org/10.1103/PhysRevD.108.095003
%P 095003-6pp