Analysis of transverse momentum distributions for pp interactions at 360 GeV/c in the framework of a quark-diquark fragmentation model

Abstract

Using a quark-diquark fragmentation model, in which either the Field-Feynman or the Lund model is coupled with a quark-diquark distribution function, we study transverse momentum distributions,p_T, for the inclusive reactions pp→hadron +anything at 360 GeV/c. We find that a primordial mean transverse momentum <k_T>0.4 GeV/c can well reproduce the p_T ² distributions of charged hadrons, π⁰,K _s ⁰ , Λ⁰,K^∗ and ∑∗ and the Feynman x-p_T correlations. We confirm that a diquark in a proton plays an important role in reproducing the x-p _T correlation of Λ⁰.