Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-05-21
Phys.Lett.B387:310-314,1996
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages with all figures included. Final published version with one reference added. All files are also avaible at http://ww
Scientific paper
10.1016/0370-2693(96)00957-4
In a supersymmetric unified theory or in a generic model where a large neutron electric dipole moment $d_N$ is expected, close to the present bound, we estimate the relation g_aNN = 10^{-21\pm1}(d_N/10^{-25} e cm)(10^10 GeV/f_a) between d_N itself, the scalar coupling g_{aNN} to nucleons of the axion, assumed to exist, and the breaking scale, f_a, of the Peccei-Quinn symmetry. Newly developing techniques to search for sub-cm macroscopic forces might reveal a signal due to axion exchange at least in a favorable range of f_a.
Barbieri Riccardo
Romanino Andrea
Strumia Alessandro
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