Not if there is constant creation. And also, not if the two forms of matter exist at opposite sides of some event horizon... (I assume one black hole not two are needed for this kind of +- galaxy).

The problem you have with trying to reach the other side of an event horizon is not at all simple.

Also the annihilation you talk about at the beginning of time, is entirely suspect given that in order to get this violation of symmetry, you have to violate every known conservation law along the way.

To find a model of galaxies consistent with the conservation laws you are compelled to say there must be antimatter out there, now where the hell is it?

Does it not seem peculiar to you that every last galaxy in spiral form has both arms touching the energetic nucleus at two poles? That is unexplained by an accretion method. If you say instead that the nucleus evaporates its mass, you would a) create both matter and antimatter constantly and b) find the only places where there is any stability for + and - matter to co-habit, to be on opposite sides of an event horizon.

Bart Alder - Seyfert