# Seesaws and Dark Energy

Lawrence Krauss and James Dent recently proposed a mechanism for producing the observed scale of dark energy. This proposal was inspired by the see-saw mechanism that produces light yet non-zero neutrino masses.

I can't help but notice there are many reasons to doubt the see-saw mechanism package since it suffers from the the flavor, CP, and gravitino problems and several alternatives have been proposed.

Would it be feasible to come up with a mechanism based on the alternatives to the seesaw and hence extend Krauss' and Dent's proposal?

I didn't read the details of the paper. However, from what I saw the authors show that by coupling a new scalar to the Higgs with coupling $\lambda_{mix}$, the theory produces a new particle with a mass proportional to this mixing. They then go on to say that $\lambda_{mix}$ could naturally be small since it should be a ratio of scales, $$\lambda_{mix} \sim -\frac{m_H^2}{M _{X} ^2}$$ This last part is where the see-saw mechanism comes in.