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Hadronic Structure Measurements of the Photon by DELPHI at LEP II

Nygren, Andreas LU (2001)
Abstract (Swedish)
Popular Abstract in Swedish

Om ljuspartiklar (fotoner) uppnår tillräcklig hög energi kan dessa omvandlas till ett partikel- anti-partikel par under en kort tidsrymd. Det är då möjligt får två sådana fotoner att kollidera och det går då studera ljusets struktur. I denna avhandling studeras kollisioner där ljuset har fluktuerat till hadronsk materia och där hela kinematiken i två-foton kollisionen är känd.
Abstract
This thesis is mainly an analysis of data taken by the VSAT detector in the DELPHI experiment at the LEP II collider at CERN. The analysis spans from 1998 to 2000, with a center of mass energy ranging from 189 to 206 GeV. The VSAT calorimeter was constructed to be a luminosity and background monitor for the DELPHI experiment, and a full description of the luminosity and background analysis for the LEP II conditions is presented.



The VSAT detector is located in the very forward direction and covers angles between three and eight milliradians since 1998. This also makes the detector to an excellent tool for studying two photon physics, as the outgoing electrons from a two-photon collision mainly are located at small... (More)
This thesis is mainly an analysis of data taken by the VSAT detector in the DELPHI experiment at the LEP II collider at CERN. The analysis spans from 1998 to 2000, with a center of mass energy ranging from 189 to 206 GeV. The VSAT calorimeter was constructed to be a luminosity and background monitor for the DELPHI experiment, and a full description of the luminosity and background analysis for the LEP II conditions is presented.



The VSAT detector is located in the very forward direction and covers angles between three and eight milliradians since 1998. This also makes the detector to an excellent tool for studying two photon physics, as the outgoing electrons from a two-photon collision mainly are located at small angles. A full study of the VSAT double tag data between 1998 and 2000 is presented. Gamma-gamma collisions with an invariant mass reaching up to 100 GeV could be explored in a Q2 range of 0.2-0.8 GeV. With help of data from the STIC detector,which is located at larger polar angles, two photon collisions could also be probed with a Q2 between 20 and 100 GeV. (Less)
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author
opponent
  • Prog. Soldner-Rembold, Stefan, Geneve
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Elementarpartikelfysik, DELPHI, LEP, VSAT, luminosity, two-photon physics, cross section, double tag, bhabha, background, structure function, kvantfältteori, quantum field theory, Elementary particle physics, Fysicumarkivet A:2001:Nygren
pages
153 pages
defense location
Lecture hall B at Fysicum
defense date
2001-09-28 10:15
external identifiers
  • Other:LUNFD6/(NFFL-7199)2001
ISBN
91-628-4932-8
language
English
LU publication?
yes
id
6feefad8-3d05-48ea-a1ab-cf83e08cf7bc (old id 41760)
date added to LUP
2007-09-28 13:06:46
date last changed
2016-09-19 08:45:16
@misc{6feefad8-3d05-48ea-a1ab-cf83e08cf7bc,
  abstract     = {This thesis is mainly an analysis of data taken by the VSAT detector in the DELPHI experiment at the LEP II collider at CERN. The analysis spans from 1998 to 2000, with a center of mass energy ranging from 189 to 206 GeV. The VSAT calorimeter was constructed to be a luminosity and background monitor for the DELPHI experiment, and a full description of the luminosity and background analysis for the LEP II conditions is presented.<br/><br>
<br/><br>
The VSAT detector is located in the very forward direction and covers angles between three and eight milliradians since 1998. This also makes the detector to an excellent tool for studying two photon physics, as the outgoing electrons from a two-photon collision mainly are located at small angles. A full study of the VSAT double tag data between 1998 and 2000 is presented. Gamma-gamma collisions with an invariant mass reaching up to 100 GeV could be explored in a Q2 range of 0.2-0.8 GeV. With help of data from the STIC detector,which is located at larger polar angles, two photon collisions could also be probed with a Q2 between 20 and 100 GeV.},
  author       = {Nygren, Andreas},
  isbn         = {91-628-4932-8},
  keyword      = {Elementarpartikelfysik,DELPHI,LEP,VSAT,luminosity,two-photon physics,cross section,double tag,bhabha,background,structure function,kvantfältteori,quantum field theory,Elementary particle physics,Fysicumarkivet A:2001:Nygren},
  language     = {eng},
  pages        = {153},
  title        = {Hadronic Structure Measurements of the Photon by DELPHI at LEP II},
  year         = {2001},
}