Georgi, HowardKim, Jihn E.Nilles, Hans-Peter2016-09-071998Georgi, Howard, Jihn E. Kim, and Hans-Peter Nilles. 1998. “Hidden Sector Gaugino Condensation and the Model-Independent Axion.” Physics Letters B 437 (3-4) (October): 325–330. doi:10.1016/s0370-2693(98)00916-2.0370-2693http://nrs.harvard.edu/urn-3:HUL.InstRepos:28265570In the effective field theory framework, we consider the effect of supersymmetry breaking via gaugino condensation and supergravity in the hidden sector gauge group on the hidden sector vacuum angle θ h. The θ h parameter dependence of the potential yields phenomenologically acceptable invisible axion solutions if the U(1) R symmetry is broken down to a discrete subgroup Z N with N ≥ 3 ( N = 4 is marginal). Anomalous U(1) superstring models are good candidates for this invisible axion resolution of the strong CP puzzle.en-USJournal Article2016-09-0710.1016/S0370-2693(98)00916-2