Abstract This paper presents a study on `hard' and `soft' interactions in $\bar{\text{p}}$p (pp) collisions using a phenomenological model of HIJING, the jet-cone reconstruction method is employed to select the `hard' and `soft' event sub-samples from minimum bias events. It is found that the HIJING model can reproduce the energy scaling behaviour of mean transverse momentum ($\langle$ pT$\rangle$) distributions of charged hadrons versus multiplicity (Nch) in `soft' events. From the PYTHIA simulation comparing with the HIJING model, the enhancement of the kaon and proton yields from `hard' interactions comparing with `soft' interactions is observed to be due to the mini-jets effect. These mechanisms responsible for the increase of charged hadron's $\langle$ pT$\rangle$ are different in `soft' and `hard' interactions.
Received: 24 September 2005
Revised: 23 June 2006
Accepted manuscript online:
Fund: Project supported by National Natural
Science Foundation of China (Grant Nos 10275060 and 10475071).
Cite this article:
Zhang Yi-Fei(张一飞), Huang Sheng-Li(黄胜利), Zhang Zi-Ping(张子平), and Wu Jian(伍健) Study on `soft' and `hard' interactions in $\bar{\rm p}$p (pp) collisions using HIJING and PYTHIA 2007 Chinese Physics 16 58
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