Speculations on Cosmology

My continued interest in cosmology left me with the impression, that today's 'Standard Cosmology' is able to produce numerical results of astonishing accuracy when compared with experimental findings. However, a fundamental understanding appears to be lacking. In this situation I started to think about the hypothesis that matter and antimatter might repel each other (MAR), an attractive idea that has continued to flare up in the literature almost since the discovery of antimatter by Paul Dirac (1928).

Today the Astrophysics community has banned this idea on the grounds of Einstein's theory General Relativity (GR), and it is hardly ever mentioned in modern textbooks any more. This is astonishing considering the fact that GR was presented in 1915, more than a dozen years before the advent of antimatter. A similar relation holds true for Friedmann's models (1922) which are the basis of today's 'Standard Model' of the Cosmos. In addition they violate nature's probably most fundamental CPT symmetry. This symmetry continues to be tested carefully which no unique consensus as of today. However, the Astropysics community seems to be more inclined to wait for the discovery of such a violation than to allow putting to question whether GR is able to handle antimatter correctly.

Many of the difficulties in a fundamental understanding of features of the 'Standard Model' would conceivably disappear if we went back to this old idea, such that I started to ask the heretical question, whether there might not be a generalization or modification of GR that was compatible with MAR.
There is a vast literature on Cosmology of which I only mention the very concise and well readable books by Andrew Liddle in which the basic questions are clearly exposed.

In the following I list a chronologically ordered sequence of short essays on the topic, which have to be considered as reports of work in progress. They are purposely left unchanged despite of the fact that they occasionally contain statements that turned out to be incorrect later on. Of course I am eagerly awaiting the results of the AEgIS-, ALPHA-, and GBAR-experiments at CERN which try to measure the deflection of antihydrogen atoms in the gravitational field of the earth.