Matter Dominance: Exploring the Annihilation Phase

[Cosmo Novice]

Are there any explanations for the abundance of matter during the M/AM annhialation phase?

If the Universe is spatially flat and infinite, then would it have mattered how much Antimatter there was as by definition a flat and spatially infinite U has infinite matter and energy.

Is there also a measurable anti-energy? As if mass/energy are interchageable then wouldn't anti-matter be changeable with anti-energy?

 

[bcrowell]

Are there any explanations for the abundance of matter during the M/AM annhialation phase?

Theorists always have answers to our questions. Just don't expect them to agree with each other :-)

WP has an article on this topic: http://en.wikipedia.org/wiki/Baryon_asymmetry

by definition a flat and spatially infinite U has infinite matter and energy.

The total energy of the universe is not well defined: https://www.physicsforums.com/showthread.php?t=506985 I don't think there's even any standard way of saying whether it's finite or infinite.

Is there also a measurable anti-energy? As if mass/energy are interchageable then wouldn't anti-matter be changeable with anti-energy?

There really isn't anti-energy. The difference between an electron and a positron is electric charge. For example, if you annihilate an electron with an antielectron, you get zero charge, but you don't get zero energy (energy canceling with anti-energy), you get 1022 keV of energy.