Chiral dynamics of baryons in the perturbative chiral quark model [Elektronische Ressource] / vorgelegt von Kem Pumsa-ard

Description

Chiral Dynamics of Baryons inthe Perturbative Chiral QuarkModelDISSERTATIONzur Erlangung des Grades eines Doktorsder Naturwissenschaftender Fakult¨at fu¨r Mathematik und Physikder Eberhard-Karls-Universit¨at zu Tu¨bingenvorgelegt vonKem Pumsa-ardaus Bangkok, Thailand2006Tag der mu¨ndlichen Pru¨fung: 27 Juli 2006Dekan: Prof. Dr. Peter Schmid1. Berichterstatter: Prof. Dr. Dr. h.c. mult. Amand F¨aßler2. Berichterstatter: Prof. Dr. Thomas GutscheABSTRACTIn this work we develop and apply variants of a perturbative chiral quark model(PCQM) to the study of baryonic properties dominantly in the low-energy region.In the PCQM baryons are considered in leading order as bound states of valencequarkswithanontrivialstructure,whilethesea-quarkexcitationsarecontainedinacloudofpseudoscalarmesonsasimposedbychiralsymmetryrequirements. Sincethe valence quark structure dominates, pseudoscalar or chiral effects are treatedperturbatively. In a first step we consider a noncovariant form of the PCQM,where confinement is modelled by a static, effective potential and chiral correc-tions are treated to second order, in line with similar chiral quark models. Weapply the PCQM to the study of the electromagnetic form factors of the baryonoctet. We focus in particular on the low-energy observables such as the magneticmoments, the charge and magnetic radii.

Sujets

• Physik

Informations

• Publié par: eberhard_karls_universitat_tubingen
• Publié le: 01 janvier 2006
• Nombre de lectures: 8
• Langue: English
• Poids de l'ouvrage: 1 Mo

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