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The physics of elementary particles - C C - May 5, 2015
Part I
https://plus.maths.org/content/physics-elementary-particles
EXCERPT: The realisation that the great diversity of the world stems from a handful of elementary particles acting under the influence of a few fundamental forces was one of the triumphs of twentieth century physics. But the path to this realisation was not straightforward, and at one point physicists were faced with a bewildering collection of "fundamental particles" — more than there are elements in the chemical table! It has taken an understanding of mathematical symmetry combined with experiments into conditions similar to those soon after the "Big Bang" to bring physicists to the elegant understanding of today....
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Part II
https://plus.maths.org/content/physics-elementary-particles-part-ii
EXCERPT: In the first part of this article we looked at the elementary particles and the forces they feel. Now we will explore some mysteries of particle physics that still remain open....