Deutsch
URN to cite this document: urn:nbn:de:bvb:355-opus-10061
Warkentin, Nikolaus (2008) Nucleon wave function from lattice QCD. PhD, Universität Regensburg
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Abstract (English)
In this work we develop a systematic approach to calculate moments of leading-twist and next-to-leading twist baryon distribution amplitudes within lattice QCD. Using two flavours of dynamical clover fermions we determine low moments of nucleon distribution amplitudes as well as constants relevant for proton decay calculations in grand unified theories. The deviations of the leading-twist nucleon distribution amplitude from its asymptotic form, which we obtain, are less pronounced than sometimes claimed in the literature. The results are applied within the light cone sum rule approach to calculate nucleon form factors that are compared with recent experimental data.
Translation of the abstract (German)
In dieser Arbeit entwickeln wir einen systematischen Zugang zur Berechnung der Momente der Nukleondistributionsamplitude im führendem Twist im Rahmen der Gitter QCD. Wir bestimmen die niedrigsten Momente unter Benutzung der dynamischen zwei flavor Clover fermionen, so wie auch für Nukleonzerfall in GUT relavante Konstanten. Die erhaltene Abweichung von der asymptotischen Form ist deutlich weniger stark ausgeprägt als manchmal in der Literatur behauptet. Die erhaltenen Ergebnisse werden im Rahmen der Lichtkegel Summenregel zur Bestimmung der Nukleonformfaktoren verwendet und mit den neusten experimentellen Daten verglichen.
| Item Type: | Thesis of the University of Regensburg (PhD) | ||||||
|---|---|---|---|---|---|---|---|
| Referee: | Prof. Dr. Andreas Schäfer | ||||||
| Date of exam: | 28 May 2008 | ||||||
| Institutions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer | ||||||
| Classification: |
| ||||||
| Keywords: | Quantenchromodynamik , Nukleonenstruktur , , nukleon , quark distribution amplitude | ||||||
| Subjects: | 500 Science > 530 Physics | ||||||
| Status: | Published | ||||||
| Refereed: | Yes, this version has been refereed | ||||||
| Created at the University of Regensburg: | Yes | ||||||
| Owner: | Universitätsbibliothek Regensburg | ||||||
| Deposited On: | 27 Oct 2009 17:27 | ||||||
| Last Modified: | 21 Jul 2011 00:04 | ||||||
| Item ID: | 10760 |
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