"Dark Matter" by Jonathan Feng (University of California, Irvine)
Автор: SLAC National Accelerator Laboratory
Загружено: 2012-09-03
Просмотров: 2234
Eighty-four percent of the matter in the universe is invisible to us. It can't be seen by direct observational methods -- Hubble can't take its picture, nor can Kepler see it orbiting other stars. The only way we know it's there is indirectly, through its gravitational effects. It's called dark matter.
In this video, recorded Aug. 24, 2012, during SLAC's 50th anniversary scientific symposium, dark matter theorist Jonathan Feng of UC Irvine gives a rundown of our options for unveiling the furtive particle. There are basically three: detect the byproducts of dark matter particles annihilating themselves, as when a matter-antimatter pair of particles self-destructs to release energy as photons; capture the echo of a dark matter particle bouncing off an atom in a detector far underground; or create them ourselves in a big collider like the LHC. Each method has its strengths and weaknesses, and Feng covers them all in this entertaining talk.
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