New Aspects of M^8-H Duality

Abstract

M⁸-H duality is now a central part of TGD and leads to new findings. M⁸-H duality can be formulated both at the level of space-time surfaces and light-like 8-momenta.  Since the choice of M⁴ in the decomposition of momentum space M⁸ = M⁸ x E⁴ is rather free, it is always possible to find a choice for which light-like 8-momentum reduces to light-like 4-momentum in M⁴ - the notion of 4-D mass is relative. This leads to what might be called SO(4)-SU(3) duality corresponding to the hadronic and partonic views about hadron physics. Particles, which are eigenstates of mass squared are massless in M⁴ x CP₂ picture and massive in M⁸ picture.