Electromagnetic process in few-nucleon systems with the chiral perturbation theory

Electromagnetic process in few-nucleon systems with the chiral perturbation theory

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Electromagnetic process in few-nucleon systems with the chiral perturbation theory

Bibliographic description

title:	Electromagnetic process in few-nucleon systems with the chiral perturbation theory
alternative title:	Procesy elektromagnetyczne w układach kilkunukleonowych w ramach chiralnej teorii zaburzeń
author:	Rozpędzik Dagmara
reviewer:	Kamys Bogusław , Zrałek Marek
advisor:	Golak Jacek
institution:	Jagiellonian University. Marian Smoluchowski Institute of Physics
place of creation:	Cracow
date of submittion :	2010-12-10
pages:	[2], VI, 153, [2]
callnumber :	Dokt. 2010/220
notes:	Dostęp do publikacji jest możliwy w Archiwum UJ
language:	English
abstract in English:	The Chiral Effective Field Theory (ChEFT) is a modern framework to analyze properties of few-nucleon systems in the low-energy regime. It is based on the most general elfective Lagrangian for pions and nucleons consistent with the chiral symmetry of QCD. For energies below the pion-production threshold it is possible to eliminate the pionie degrees of freedom and derive nuclear potentials and nuclear current operators solely in terms of nucleonic degrees of freedom. This is very important because, despite many elforts in the past, the consistence between two-nucleon forces, many-nucleon forces and corresponding current operators has not been achieved yet. In this thesis, we consider recently derived long-range two-pion exchange (TPE) contributions to the nuclear current operator which appear at higher order chiral expansions. These operators do not contain any new free parameters. Based on ChEFT dynamical picture, we study their role in the electron and photon scattering reactions and compare chiral predictions with those obtained in the conventional framework and to the existing experimental data. The bound and scattering states are calculated with five different chiral nucleon-nucleon potentials leading to the so-called theoretical uncertainty bands for the predicted observables.
keywords in Polish:	procesy elektromagnetyczne, ChEFT, jądrowy prąd elektromagnetyczny
keywords in English:	electromagnetic processes, ChEFT, electromagnetic nuclear current
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
type:	dissertation