Thursday, 27 December 2012

Why Universe Dominated by Matter Not Anti-Matter

Measurements Hint Why the Universe Is Dominated by Matter, Not Anti-Matter

Dec. 26, 2012 — A collaboration with major participation by physicists at the University of Wisconsin-Madison has made a precise measurement of elusive, nearly massless particles, and obtained a crucial hint as to why the universe is dominated by matter, not by its close relative, anti-matter.

A pool holding four anti-neutrino detectors begins filling with ultra-pure water in September, 2012 at the Daya Bay Neutrino experiment. The experiment, just recognized by Science magazine as a breakthrough of the year, is helping to explain why the universe contains virtually no anti-matter. University of Wisconsin-Madison physicist Karsten Heeger and Physical Sciences Laboratory engineer Jeff Cherwinka both played major roles at the experiment. (Credit: Roy Kaltschmidt, Lawrence Berkeley National Laboratory)
The particles, called anti-neutrinos, were detected at the underground Daya Bay experiment, located near a nuclear reactor in China, 55 kilometers north of Hong Kong.

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Sources: University of Wisconsin at Madison, .


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