Hard hadronic reactions are hadron reactions in which the main role is played by quarks and gluons and which are well described by perturbation theory in QCD.
All hadrons discovered so far fit into the standard picture, in which they are colorless composite particles built from quarks and antiquarks. The characteristic energies associated with this internal quark structure (that is, the characteristic binding energies in potential models) are of the order of GeV. There is a natural classification of hadron collision processes:
In this case, good accuracy hadrons can be considered weakly coupled, and scattering occurs between the individual components of rapidly moving hadrons - partons. This behavior is called asymptotic freedom and is primarily associated with a decrease in the strong interaction constant with an increase in the transfer of momentum (for this discovery the 2004 Nobel Prize in Physics was awarded).
Hard hadronic reactions are hadron reactions in which the main role is played by quarks and gluons and which are well described by perturbation theory in QCD.
All hadrons discovered so far fit into the standard picture, in which they are colorless composite particles built from quarks and antiquarks. The characteristic energies associated with this internal quark structure (that is, the characteristic binding energies in potential models) are of the order of GeV. There is a natural classification of hadron collision processes:
In this case, good accuracy hadrons can be considered weakly coupled, and scattering occurs between the individual components of rapidly moving hadrons - partons. This behavior is called asymptotic freedom and is primarily associated with a decrease in the strong interaction constant with an increase in the transfer of momentum (for this discovery the 2004 Nobel Prize in Physics was awarded).