Difference in multiplicity distributions in proton-proton and proton-antiproton collisions at high energies

Abstract

Secondary charged hadrons multiplicity distributions in proton-proton and proton-antiproton collisions differ on principle. There are three types of inelastic processes in proton-antiproton scattering. The first type is production of secondary hadrons shower at gluon string decay. The second type is shower produced from two quark strings decay, the third type is shower produced from three quark strings decay. At the same time there are only two types of inelastic processes for proton-proton scattering - gluon string shower and two quark strings shower. Theoretical description of multiplicity distributions is obtained for proton-proton collisions at energies from 44.5 GeV to 200 GeV and for proton-antiproton collisions at energies from 200 GeV to 1800 GeV. The difference between proton-proton and proton-antiproton multiplicity distributions is discussed. The predictions of multiplicity distribution and mean multiplicity at LHC energy are given.