On the Dynamical Fluctuations in the Production and Evolusion of Jets in High Energy Hadron-Hadron Collisions

  • The dynamical fluctuations in 3 different samples of 630 GeV/c proton-antiproton collisions are studied using Monte Carlo method. These are the mini-bias event sample, the jetty event sample and the sample consisting of the hadrons inside jets. The jets are identified using cone-algorithm. The results show that the jetty event sample mimic the whole event sample in high energy e+e collisions has isotropic dynamical fluctuations, while the dynamical fluctuations inside jets are similar to those of the soft hadronic collisions, being isotropic in the transverse plane but anisotropic in the longitudinal-transverse planes. This shows that the production and evolusion of jets (minijets) have similar dynamical fluctuation property as the production and evolusion of jets in e+e collisions, respectively.
    The mini-bias event sample is a mixture of the jet-production processes of hard (semi hard) parton collisions and the soft hadron hadron collision processes. Therfore, it does not have simple dynamical fluctuation property.
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  • [1] . LIU Lian-Shou, CHEN Gang, FU Jing-Hua. Phys. Rev.,2001,D63:0540022. Ciapetti(UA1 Collab.).〈pt〉CH Dependence on Event Multiplicity in Minimum Bias Events at the SPS Collider. Proc. 5th Top-ical Workshop on Proton-Antiproton Collider Physics, eds. GrecoM, 1985 3. LIU Feng, LIU Fu-Ming, LIU Lian-Shou. Phys. Rev.,1999,D59:1140204. Sjstrand T. Comp. Phys. Commun.,1994,82:74 5. LIU Feng(y), LIU Feng, LIU Lian-Shou. HEPNP,1997,21:138(in Chinese)(柳峰,刘峰,刘连寿.高能物理与核物理,1997,21:138)6. GUO Yuan-Yuan, ZENG Jie,YIN Jian-Wu.HEPNP ,2001,25:1084(in Chinese)(郭媛媛,曾杰,尹建武.高能物理与核物理,2001,25:1084) 7. Bialas A ,Peschanski R .Nucl. Phys.,1986,B273:703;1988,B308:857 8. De Wolf E A ,Dremin I M ,Kittel W .Phys. Rep.,1996,270:1 9. Ochs W .Phys. Lett.,1990,B247:10110. WU Yuan-Fang, LIU Lian-Shou. Phys. Rev. Lett.,1993,21:3197 11. WU Yuan-Fang, LIU Lian-Shou. Science in China, 1995,A38:43512. YIN Jian-Wu, LIU Feng,LIU Lian-Shou.HEPNP ,2002,26:157(in Chinese)(尹建武,刘峰,刘连寿.高能物理与核物理,2002,26:157)13. Ochs W .Z .Phys.,1991,C50:33914. Agabayan N M et al (NA22). Phys. Lett.,1996,B382:305;1998,B431:451 15. WANG S, WANG Z ,WU C .Phys. Lett.,1997,B410:323 16. LIU Lian-Shou, ZHANG Yang, DENG Yue. Z. Phys.,1997,C73:535
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YIN Jian-Wu and LIU Feng. On the Dynamical Fluctuations in the Production and Evolusion of Jets in High Energy Hadron-Hadron Collisions[J]. Chinese Physics C, 2002, 26(5): 477-483.
YIN Jian-Wu and LIU Feng. On the Dynamical Fluctuations in the Production and Evolusion of Jets in High Energy Hadron-Hadron Collisions[J]. Chinese Physics C, 2002, 26(5): 477-483. shu
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Received: 2001-07-16
Revised: 1900-01-01
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On the Dynamical Fluctuations in the Production and Evolusion of Jets in High Energy Hadron-Hadron Collisions

    Corresponding author: LIU Feng,
  • Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China

Abstract: The dynamical fluctuations in 3 different samples of 630 GeV/c proton-antiproton collisions are studied using Monte Carlo method. These are the mini-bias event sample, the jetty event sample and the sample consisting of the hadrons inside jets. The jets are identified using cone-algorithm. The results show that the jetty event sample mimic the whole event sample in high energy e+e collisions has isotropic dynamical fluctuations, while the dynamical fluctuations inside jets are similar to those of the soft hadronic collisions, being isotropic in the transverse plane but anisotropic in the longitudinal-transverse planes. This shows that the production and evolusion of jets (minijets) have similar dynamical fluctuation property as the production and evolusion of jets in e+e collisions, respectively.
The mini-bias event sample is a mixture of the jet-production processes of hard (semi hard) parton collisions and the soft hadron hadron collision processes. Therfore, it does not have simple dynamical fluctuation property.

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