中国物理B ›› 2007, Vol. 16 ›› Issue (1): 58-61.doi: 10.1088/1009-1963/16/1/010

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Study on `soft' and `hard' interactions in pp (pp) collisions using HIJING and PYTHIA

张一飞, 黄胜利, 张子平, 伍健   

  1. Department of Modern Physics, University of Science and Technology of China, Hefei 230027, China
  • 收稿日期:2005-09-24 修回日期:2006-06-23 出版日期:2007-02-01 发布日期:2007-02-01
  • 基金资助:
    Project supported by National Natural Science Foundation of China (Grant Nos 10275060 and 10475071).

Study on `soft' and `hard' interactions in $\bar{\rm p}$p (pp) collisions using HIJING and PYTHIA

Zhang Yi-Fei(张一飞), Huang Sheng-Li(黄胜利), Zhang Zi-Ping(张子平), and Wu Jian(伍健)   

  1. Department of Modern Physics, University of Science and Technology of China, Hefei 230027, China
  • Received:2005-09-24 Revised:2006-06-23 Online:2007-02-01 Published:2007-02-01
  • Supported by:
    Project supported by National Natural Science Foundation of China (Grant Nos 10275060 and 10475071).

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摘要： This paper presents a study on `hard' and `soft' interactions in pp (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 (< pT>) 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 T> are different in `soft' and `hard' interactions.

关键词: mini-jet, HIJING, PYTHIA, soft gluon radiation

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.

Key words: mini-jet, HIJING, PYTHIA, soft gluon radiation

中图分类号:  (Inclusive production with identified hadrons)

  • 13.85.Ni
12.40.-y (Other models for strong interactions) 13.87.Ce (Production)