Energy and System Size Dependence of Xi- and Xi+ Production in Relativistic Heavy-Ion Collisions at the CERN SPS
Energy and System Size Dependence of Xi- and Xi+ Production in Relativistic Heavy-Ion Collisions at the CERN SPS

Energy and System Size Dependence of Xi- and Xi+ Production in Relativistic Heavy-Ion Collisions at the CERN SPS


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About the Book

Doctoral Thesis / Dissertation from the year 2007 in the subject Physics - Nuclear Physics, Molecular Physics, Solid State Physics, grade: 1,0, University of Frankfurt (Main) (Institut für Kernphysik), language: English, abstract: Quarks sind die elementaren Bestandteile, aus denen Hadronen (Baryonen und Mesonen) aufgebaut sind. Zusammen mit den Leptonen und den Eichbosonen gelten sie heute als die fundamentalen Bausteine, aus denen alle Materie aufgebaut ist. Im Standardmodell der Teilchenphysik werden diese Ergebnisse zusammengefasst. Es gibt sechs verschiedene Quark-Arten (flavours): up, down, strange, charm, bottom und top. In der Natur kommen keine isolierten Quarks vor, sondern nur Kombinationen aus z.B. einem Quark-Antiquark Paar (Meson) oder aus drei Quarks (Baryon). Die Quantenchromodynamik (QCD) beschreibt die starke Wechselwirkung zwischen Quarks und Gluonen. Quarks bauen unter anderem Protonen und Neutronen auf. Gluonen vermitteln die Wechselwirkung zwischen den Quarks. Konzeptionell ist die QCD an die Quantenelektrodynamik (QED) angelehnt, die die Wechselwirkung elektrisch geladener Teilchen (z.B. Elektron oder Positron) durch den Austausch von Photonen beschreibt. Analog wirkt die Kraft, die durch den Austausch von Gluonen beschrieben wird, zwischen Teilchen, die eine Farbladung (rot, grün, blau) tragen. Im Vergleich zur QED, wo das Photon neutral ist, trägt das Gluon selbst Farbe und wechselwirkt daher mit anderen Gluonen. Bei kleinen Quarkabständen und hohen Energien bzw. hohen Impulsüberträgen, fällt die Kopplungskonstante der starken Wechselwirkung (αs) ab. Bei kleinem αs sind Quarks und Gluonen schwach gebunden (Asymptotische Freiheit). Bei grossen Abständen bzw. kleinen Impulsüberträgen ist αs gross. Die Zunahme von αs bewirkt, dass unendlich viel Energie benötigt wird, um Quarks aus Hadronen herauszulösen. Dies hat die Folge, dass es günstiger ist ein neues Quark-Antiquark Paar zu erzeugen. Das erklärt, warum Quarks immer in Hadronen (Mesonen un


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Product Details
  • ISBN-13: 9783656874317
  • Publisher: Grin Verlag Gmbh
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 10 mm
  • Width: 148 mm
  • ISBN-10: 365687431X
  • Publisher Date: 20 Jan 2015
  • Height: 210 mm
  • No of Pages: 180
  • Series Title: English
  • Weight: 290 gr


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Energy and System Size Dependence of Xi- and Xi+ Production in Relativistic Heavy-Ion Collisions at the CERN SPS
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Energy and System Size Dependence of Xi- and Xi+ Production in Relativistic Heavy-Ion Collisions at the CERN SPS
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