Fermi Lagrangian

After many years of effort, and many false starts, it was concluded in the mid-1950s that all of weak interaction phenomenology could be described by the Fermi Lagrangian... 

The Fermi Lagrangian then gives rise to three types of weak process (all of a point-like nature since interactions only take place when all the particles are at the same point) ... 

In this way, we can relate duality to quark-hadron continuity. We considered duality, which is already present at zero chemical potential, between the soliton and the vector mesons a fundamental property of the spectrum of QCD which should persists as we increase the quark chemical potential. Should be noted that differently than in [42] we have not subtracted the energy cost to excite a soliton from the Fermi sea. Since we are already considering the Lagrangian written for the excitations near the Fermi surface we would expect not to consider such a corrections. In any event this is of the order //, [42] and hence negligible with respect to Msoiiton. 

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