  Proton-proton collision is a simple system to investigate nuclear matter and
it is considered to be a guide for more sophisticated processes in the
proton-nucleus and the nucleus-nucleus collisions. In this article, we present
a phenomological study of how the mechanism of particle production in pp
interaction changes over a wide range of interaction energy. This study is done
on data of charged particle produced in pp experiments at different values of
energy. Some of these data give the created particles classified as hadrons,
baryons and mesons, which help us compare between production of different
particles. This might probe some changes in the state of nuclear matter and
identify the mechanism of interaction.
