**Authors:** John A. Gowan

Our first consideration is the bottom line of the Tetrahedron Model diagram (the line representing the spacetime metric and gravity), connecting the Symmetry and Entropy poles. The spacetime metric has two major expressions: 1) metric particles or "bosons" (derived from the Symmetry pole); and 2) the structural and regulatory dimensional metric field of spacetime (derived from the Entropy pole). The metric field is a conservation mechanism of spacetime, created by: 1) its embedded intrinsic motions, light, time, and gravitation; 2) its regulators, the universal gauge constants "c" and "G"; 3) the energy and symmetry conserving forces of inertia. The particle aspect of this line I refer to as "metric particles", the bosons or field vectors (force carriers) of the forces, such as the photon, the graviton, the IVBs (Intermediate Vector Bosons) of the weak force, and the gluons of the strong force "color" charges. Bosons (except for the massive weak force IVBs) are massless and travel at velocity c; they appear to be produced or transmitted by the metric as vibrations or similar disturbances of its structure (hence the several massless varieties all have the same velocity "c"). Bosons are evidently not composed of quarks or leptons like the fermions of ordinary matter, and most basically, they do not appear to be the product of the symmetry-breaking process that produced ordinary fermions in the "Big Bang" - they do not appear to be the asymmetric halves of particle-antiparticle pairs, but rather whole particle units, complete in themselves and unchanged since the very beginning of the Cosmos - like the dimensions themselves. The "Intermediate Vector Bosons" (IVBs) of the weak force are unusual in that they are very massive bosons, whereas all other bosons are massless. For a discussion of these unusual weak force bosons (and the related "Higgs" boson), see: "The Higgs Boson and the Weak Force IVBs".

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[v1] 14 Oct 2010

[v2] 16 Jun 2011

[v3] 23 Jun 2011

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