[Article] The neutrino matrix: why are there three of everything?

13 03 2012
Various flavours. But also mass, unfortunately.

Various flavours. But also mass, unfortunately.

Last week’s results from the Daya Bay neutrino experiment were the first real measurement of the third neutrino mixing angle, θ13 (theta one-three). There have been previous experiments which set limits on the angle, but this is the first time it has been shown to be significantly different from zero.

Since θ13 is a fundamental parameter in the Standard Model of particle physics1, this would be an important measurement anyway. But there’s a bit more to it than that.

Read more…

(This is a great article by Jon Butterworth at the Guardian on one of my favourite topics!)

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