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Title: A Nelson-Barr model †Speaker: Kohei Fujikura †Several solutions to the strong CP problem including QCD axion have been proposed so far. One possible solution to the strong CP problem is that CP is an exact symmetry, spontaneously broken at some scale. Nelson and Barr constructed the simple phenomenologically viable models in this framework called Nelson-Barr models [1,2]. In this talk, I will review the general features of a Nelson-Barr model and show that a Nelson-Barr model with gauge-mediated supersymmetry breaking is a plausible solution to the strong CP problem. This talk is based on Ref. [3] and the review of a Nelson-Barr model [4]. |