Lattice QCD calculations

Due to the asymptotic freedom, the coupling constant of QCD is a diminishing function as the energy scale increases according to the following equation, already stated (*): . Therefore, the high-energy or equivalently the short-distance behavior can be described by a perturbative expansion, but a perturbative approach to the QCD fails at large distances where the begins to … Continue reading Lattice QCD calculations

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The QCD phase diagram

A phase diagram aims to describe the behaviour of matter at different conditions depending for example from variables such as pressure and temperature. In the QCD phase diagram the interactions between particles are ruled by the quantum chromodynamics. The QCD phase transition scheme, in fact, is yet under studies and one of the targets of … Continue reading The QCD phase diagram