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2010年5月18日火曜日

From Fermilab, a New Clue to Explain Human Existence? - NYTimes.com

From Fermilab, a New Clue to Explain Human Existence? - NYTimes.com

A recent discovery at Fermilab may explain why all the matter and antimatter created during the big bang did not cancel out ... because, due to the behavior of neutral B-mesons, more matter than antimatter was created. This is preliminary and will need to be reproduced in the Large Hadron Collider.

Here's the key paragraph:

[The creation of more matter than antimatter] hinges on the behavior of particularly strange particles called neutral B-mesons, which are famous for not being able to make up their minds. They oscillate back and forth trillions of times a second between their regular state and their antimatter state. As it happens, the mesons, created in the proton-antiproton collisions, seem to go from their antimatter state to their matter state more rapidly than they go the other way around, leading to an eventual preponderance of matter over antimatter of about 1 percent, when they decay to muons.

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