  The 2-neutrino exchange potential is a Standard Model weak potential arising
from the exchange of virtual neutrino-antineutrino pairs which must include all
neutrino properties, including the number of flavors, their masses, fermionic
nature (Dirac or Majorana), and CP violation. We describe a new approach for
calculating the spin-independent 2-neutrino exchange potential, including the
mixing of three neutrino mass states and CP violation.
