Large Hadron Collider finds new way to measure mass of a quark

The ALICE experiment of the Large Hadron Collider has, for the first time, directly measured a phenomenon known as the “deadcone,” which has allowed physicists to directly measure the mass of a fundamental particle known as a “charm quark.”

Many particles that form the visible universe around us are actually composite particles built from less massive fundamental particles known as quarks. Protons and neutrons, for example, contain three quarks each. There are six different flavors of quark — up, down, top, bottom, strange and charm — which each have different masses, spins and other quantum properties. Different combinations of quarks also form different particles. The quarks are held together in these composite particles by the strong force, which is transmitted via a massless particle called a gluon. Collectively, quarks and gluons are known as ‘partons’.

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