A
actual
Guest
How's about this - <br /><br />There is no matter/Antimatter asymmetry. The universe contains the same amount of antimatter and matter. Here's how.<br /><br />At the big bang, matter and anti matter were created in equal quantities. The idea is that all the antimatter and a large fraction of the matter anhilated each other very soon after, leaving the matter universe we think we observe. However, this requires actual collisions between matter and antimatter particles. <br /><br />The universe very soon after the big bang was not homogeneous. We know this because fluctuations on the quantum scale became locked in by inflation, and are observable today as the variation in the CMB. What if the relative density of matter and antimatter were not constant across the whole universe? Matter and antimatter would not be able to completely annihilate. In regions (like ours) where matter dominated, and it could be by only a tiny fraction of a percent, some matter would be left. Like wise, there would be regions where antimatter dominated. Globally the matter antimatter ratio is still 1. <br /><br />So, pockets of anti matter and matter exist, but they are spatially seperated. Inflation then locks this spatial seperation in. Collisions can't occur between matter and antimatter because the pockets are just too far away from each other for a large quantites of particles to cross the distances.<br /><br />So, the matter and antimatter are still here today. It's just that they're seperated by very large distances.<br /><br />Any comments?