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Renormalization of three-quark operators for baryon distribution amplitudes

by Michael Gruber

Institution: Universitt Regensburg
Department:
Degree:
Year: 2017
Keywords:
Posted: 2/1/2018 12:00:00 AM
Record ID: 2151745
Full text PDF: http://epub.uni-regensburg.de/36442


Abstract

In this thesis we design and study three-quark operators that are essential for the calculation of baryon distribution amplitudes. These nonperturbative objects grant insight into the internal structure of hadrons, but their renormalization patterns are nontrivial and need to be treated with care. With the application to lattice simulations in mind we discuss two renormalization schemes, MS-bar and RI'/SMOM, and connect them by calculating conversion factors. Armed with this knowledge we are able to extract phenomenologically relevant results from an accompanying lattice analysis. In dieser Arbeit entwickeln und untersuchen wir Drei-Quark-Operatoren, die essentiell fr die Berechnung von Baryon-Distributionsamplituden sind. Diese nichtperturbativen Objekte gewhren Einblick in die interne Struktur von Hadronen, aber ihre Renormierungsmuster sind nichttrivial und mssen sorgfltig behandelt werden. Bezglich der Anwendung auf Gittersimulationen diskutieren wir zwei Renormierungsschemata, MS-bar und RI'/SMOM, und verbinden diese durch die Berechnung von Umrechnungsfaktoren. Mittels dieses Wissens sind wir in der Lage, phnomenologisch relevante Ergebnisse aus einer begleitenden Gitteranalyse zu extrahieren.Advisors/Committee Members: Schfer, Andreas (advisor), Braun, Vladimir (advisor).

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