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Dissertation/Thesis Abstract

Calculation of neutral weak nucleon form factors with the AdS/QCD correspondence
by Lohmann, Mark, M.S., California State University, Long Beach, 2014, 76; 1526925
Abstract (Summary)

The AdS/QCD (Anti-de Sitter/Quantum Chromodynamics) is a mathematical formalism applied to a theory based on the original AdS/CFT (Anti-de Sitter/ Conformal Field Theory) correspondence. The aim is to describe properties of the strong force in an essentially non-perturbative way. AdS/QCD theories break the conformal symmetry of the AdS metric (a sacrifice) to arrive at a boundary theory which is QCD-like (a payoff). This correspondence has been used to calculate well-known quantities in nucleon spectra and structure like Regge trajectories, form factors, and many others within an error of less than 20% from experiment. This is impressive considering that ordinary perturbation theory in QCD applied to the strongly interacting domain usually obtains an error of about 30%. In this thesis, the AdS/QCD correspondence method of light-front holography established by Brodsky and de Téramond is used in an attempt to calculate the Dirac and Pauli neutral weak form factors, FZ1 (Q2) and FZ2 (Q 2) respectively, for both the proton and the neutron. With this approach, we were able to determine the neutral weak Dirac form factor for both nucleons and the Pauli form factor for the proton, while the method did not succeed at determining the neutral weak Pauli form factor for the neutron. With these we were also able to extract the proton's strange electric and magnetic form factor, which addresses important questions in nucleon sub-structure that are currently being investigated through experiments at the Thomas Jefferson National Accelerator Facility.

Indexing (document details)
Advisor: Jaikumar, Prashanth
Commitee: Bill, Andreas, Papp, Zoltan
School: California State University, Long Beach
Department: Physics and Astronomy
School Location: United States -- California
Source: MAI 53/06M(E), Masters Abstracts International
Subjects: Theoretical physics, Nuclear physics
Keywords: Anti-de Sitter, Conformal Field Theory, Form factors, Neutral weak current, Quantum Chromodynamics
Publication Number: 1526925
ISBN: 978-1-321-27725-8
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