Hello Hasanuddin, this really is a fascinating subject. I've sometimes wondered just what General Relativity expects of antimatter. If we take a feynman diagram rather literally and say that an antiparticle is a normal particle moving backwards in time then perhaps this has some analog in general relativity.
There are physicists who have theorized along those lines and they have proposed some of the same things you are proposing such as cosmic acceleration and flatness resulting from an abundance of antimatter. Here are a couple good papers I've seen on the topic:
I've read your comments in this thread, but nothing else about your model. I'm wondering how it compares to the papers above. I'm also curious what your thinking is on the topic of neutrinos detected from the 1987 supernova. Many would take that observation as strong evidence for the equivalence of matter / antimatter gravitational attraction. Would you suggest that all of the detections were either neutrinos or antineutrinos, or some other explanation?
In any case, welcome to the forum and thanks for some very interesting reading.
~modest
