New submitter ag144 writes: First time witnessed, the Large Hadron Collider finds predicted double-heavy particle. BBC reports: “Nearly all the matter that we see around us is made of neutrons and protons, which form the centers of atoms. These are made up of three smaller particles called quarks which can be either light or heavy. There are, however, six different types of quarks which combine in different ways to form other kinds of particle. Those that have been detected so far contain at most, one heavy quark. This is the first time that researchers have confirmed the existence of one with two heavy quarks. The research team will now measure the properties of the Xi-cc++ to establish how this new arrangement of quarks behaves and how the strong force holds the system together. They also expect to find more double heavy quark particles. Another unusual property of the particle is that it has two positive charges double that of the proton and it is four times heavier.”
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