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View Full Version : ALPHA Closes in on Antimatter



Fraser
2012-Mar-10, 06:30 AM
We live in a universe made of matter. But at the moment of the Big Bang, matter and antimatter existed in equal amounts. That antimatter has all but disappeared suggests that nature, for some reason, has a strong preference for matter. Physicists want to know why matter has replaced its antimatter twin, and this week [...]

More... (http://www.universetoday.com/94076/alpha-closes-in-on-antimatter/)

trinitree88
2012-Mar-11, 04:54 PM
We live in a universe made of matter. But at the moment of the Big Bang, matter and antimatter existed in equal amounts. That antimatter has all but disappeared suggests that nature, for some reason, has a strong preference for matter. Physicists want to know why matter has replaced its antimatter twin, and this week [...]

More... (http://www.universetoday.com/94076/alpha-closes-in-on-antimatter/)

Fraser. An interesting experiment. However I don't think we can safely say that anti-hydrogen does not exist in nature. In the most violent, energetic supernovae, the temperature is sufficient to create almost all the types of matter/antimatter pairs, including proton/anti-proton and electron/positron...some of which could combine to make transient, but real anti-atoms of hydrogen before annihilating.Their spectra should be identical to matter hydrogen, so they would not be detectable as such, and the Doppler broadening of gamma rays from the annihilations would mask them too.....but that doesn't main it doesn't exist in nature. The experiment addresses the very real and inexplicable (as yet) fact that the mirror symmetry seen in associated pair production in all particle physics labs, by the trillions of recorded interactions, somehow did not exist in our putative Big Bang model. Equally of concern is the identical asymmetry in putative lepton production of electrons over positrons, such that for every proton exceeding antiproton, there was produced an electron over a missing positron, so that we exist. The latter is an exact match, charge for charge, as near as we can ascertain, to about 1082.....the approximate number of particles in the universe. pete