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Abstract: We study the effects that a non zero strong-CP-violating parameter thetawould have on the deuteron and diproton binding energies and on thetriple-alpha process. Both these systems exhibit fine tuning, so it isplausible that a small change in the nuclear force would produce catastrophicconsequences. Such a nuclear force is here understood in the framework of aneffective Lagrangian for pions and nucleons, and the strength of theinteraction varies with theta. We find that the effects are not too dramatic.



Author: Lorenzo Ubaldi

Source: https://arxiv.org/



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