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Impact of unitarization schemes on high-energy cosmic rays

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Vanthieghem, Arno ULiège
Promotor(s) : Cudell, Jean-René ULiège
Date of defense : 27-Jun-2016 • Permalink : http://hdl.handle.net/2268.2/1301
Details
Title : Impact of unitarization schemes on high-energy cosmic rays
Translated title : [fr] Impacte des schémas d'unitarisation sur les rayons cosmiques à hautes énergies
Author : Vanthieghem, Arno ULiège
Date of defense  : 27-Jun-2016
Advisor(s) : Cudell, Jean-René ULiège
Committee's member(s) : Bhattacharya, Atri ULiège
De Becker, Michaël ULiège
Rauw, Grégor ULiège
Meli, Athina 
Language : English
Number of pages : 89
Keywords : [en] Unitarization scheme
[en] Eikonal
[en] U matrix
[en] Cosmic ray
[en] Sibyll
[en] diffraction
[en] Good-Walker
[en] Regge theory
[en] hadron
[en] event generator
[en] soft interactions
Discipline(s) : Physical, chemical, mathematical & earth Sciences > Space science, astronomy & astrophysics
Target public : Researchers
Professionals of domain
Student
General public
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en sciences spatiales, à finalité approfondie
Faculty: Master thesis of the Faculté des Sciences

Abstract

[en] The hadronic event generators SIBYLL, QGSJET and EPOS use an Eikonal unitarization scheme. We focus on SIBYLL and present the general theoretical concepts behind this event generator and concentrate on diffraction. After a presentation of Regge theory, we present different unitarization schemes. We show the equivalence between the Good-Walker models used in SIBYLL and the GLM model. We test the U-matrix scheme. We show that U matrix fits very well the total, the elastic, the inelastic and the single diffractive cross sections with soft interactions. We show the asymptotic behaviour of the different cross sections.


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Author

  • Vanthieghem, Arno ULiège Université de Liège > Master sc. spatiales, fin. appr. (ex 2e ma.)

Promotor(s)

Committee's member(s)

  • Bhattacharya, Atri ULiège Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Inter. fondamentales en physique et astrophysique (IFPA)
    ORBi View his publications on ORBi
  • De Becker, Michaël ULiège Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
    ORBi View his publications on ORBi
  • Rauw, Grégor ULiège Université de Liège - ULg > Groupe d'astrophysique des hautes énergies (GAPHE)
    ORBi View his publications on ORBi
  • Meli, Athina Universiteit Gent
  • Total number of views 116
  • Total number of downloads 29










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