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Mini-Jet Production in Proton-Antiproton Interactions and Particle Production in Heavy-Ion Collisions

Wang, Haiqiao LU (1997) In Cosmic and Subatomic Physics dissertation
Abstract
The thesis is based on the data analysis and detector development of the EMU01/CERN, E863/BNL and UA1/CERN experiments.



Particle fluctuations are studied with the scaled factorial moments in the fragmentation region of oxygen-induced emulsion interactions from 3.7 to 200 A GeV. The intermittency indices show an energy independent behaviour in the target and projectile regions of pseudorapidity. In order to study the origin of the fluctuations, jet-like and ring-like substructures of particles produced in the azimuthal plane are investigated for the S-Au, S-Em and O-Em interactions at 200 A GeV. The study shows that the two-particle azimuthal correlations can be well understood if Bose-Einstein correlations and gamma... (More)
The thesis is based on the data analysis and detector development of the EMU01/CERN, E863/BNL and UA1/CERN experiments.



Particle fluctuations are studied with the scaled factorial moments in the fragmentation region of oxygen-induced emulsion interactions from 3.7 to 200 A GeV. The intermittency indices show an energy independent behaviour in the target and projectile regions of pseudorapidity. In order to study the origin of the fluctuations, jet-like and ring-like substructures of particles produced in the azimuthal plane are investigated for the S-Au, S-Em and O-Em interactions at 200 A GeV. The study shows that the two-particle azimuthal correlations can be well understood if Bose-Einstein correlations and gamma conversion are included. A nuclear rescattering model, which incorperates the FRITIOF model, has been developed. The model can well describe multiplicity distributions of slow recoiling protons, evaporation particles and their correlations with particles produced in high energy heavy-ion collisions.



In the autumn of 1994, truly heavy nuclei (Pb) were accelerated to 158 A GeV/c at the CERN/SPS. In order to improve the measurements of Pb-induced collisions, an automatic system based on the CCD technique and image processing was developed. This system has been used to measure densities of the particles produced.



Mini-jet production is studied using the UA1 1987 minimum bias data sample for p bar p interaction at 630 GeV of C.M.S energy. The study shows that the transverse energy distribution of mini-jets is in good agreement with the QCD prediction. The angular distributions of two leading jets show the behaviour of elastic scattering of partons with gluon exchange. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Dr Siemiarczuk, Teodor, Poland
organization
publishing date
type
Thesis
publication status
published
subject
keywords
proton antiproton interaction, Quark-gluon plasma, dynamical fluctuation, intermittency, limiting fragmentation, intranuclear cascading, target fragmentation, heavy-ion collision, image processing, mini-jet, Nuclear physics, Kärnfysik, Fysicumarkivet A:1997:Wang
in
Cosmic and Subatomic Physics dissertation
pages
124 pages
publisher
Experimental High-Energy Physics
defense location
Auditorium B of the Phys. Department, Lund, Sweden
defense date
1997-04-25 10:15
external identifiers
  • other:ISRN: LUNFD6/NFFK-1013-SE+124P
ISSN
1101-4202
ISBN
91-628-2375-2
language
English
LU publication?
yes
id
769bb31e-ac72-4162-abca-06eaf705ceac (old id 29182)
date added to LUP
2007-06-12 14:44:02
date last changed
2016-09-19 08:44:55
@phdthesis{769bb31e-ac72-4162-abca-06eaf705ceac,
  abstract     = {The thesis is based on the data analysis and detector development of the EMU01/CERN, E863/BNL and UA1/CERN experiments.<br/><br>
<br/><br>
Particle fluctuations are studied with the scaled factorial moments in the fragmentation region of oxygen-induced emulsion interactions from 3.7 to 200 A GeV. The intermittency indices show an energy independent behaviour in the target and projectile regions of pseudorapidity. In order to study the origin of the fluctuations, jet-like and ring-like substructures of particles produced in the azimuthal plane are investigated for the S-Au, S-Em and O-Em interactions at 200 A GeV. The study shows that the two-particle azimuthal correlations can be well understood if Bose-Einstein correlations and gamma conversion are included. A nuclear rescattering model, which incorperates the FRITIOF model, has been developed. The model can well describe multiplicity distributions of slow recoiling protons, evaporation particles and their correlations with particles produced in high energy heavy-ion collisions.<br/><br>
<br/><br>
In the autumn of 1994, truly heavy nuclei (Pb) were accelerated to 158 A GeV/c at the CERN/SPS. In order to improve the measurements of Pb-induced collisions, an automatic system based on the CCD technique and image processing was developed. This system has been used to measure densities of the particles produced.<br/><br>
<br/><br>
Mini-jet production is studied using the UA1 1987 minimum bias data sample for p bar p interaction at 630 GeV of C.M.S energy. The study shows that the transverse energy distribution of mini-jets is in good agreement with the QCD prediction. The angular distributions of two leading jets show the behaviour of elastic scattering of partons with gluon exchange.},
  author       = {Wang, Haiqiao},
  isbn         = {91-628-2375-2},
  issn         = {1101-4202},
  keyword      = {proton antiproton interaction,Quark-gluon plasma,dynamical fluctuation,intermittency,limiting fragmentation,intranuclear cascading,target fragmentation,heavy-ion collision,image processing,mini-jet,Nuclear physics,Kärnfysik,Fysicumarkivet A:1997:Wang},
  language     = {eng},
  pages        = {124},
  publisher    = {Experimental High-Energy Physics},
  school       = {Lund University},
  series       = {Cosmic and Subatomic Physics dissertation},
  title        = {Mini-Jet Production in Proton-Antiproton Interactions and Particle Production in Heavy-Ion Collisions},
  year         = {1997},
}