Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 10 of 10 for “"chiral phase transition"”.
-
A study of the chiral phase transition in the nonlinear sigma model
The finite temperature chiral phase transition is studied using the three dimensional non-linear sigma model. Numerical simulations with the U(N) $\times$ U(N) and SU(N) $\times$ SU(N) flavor symmetries for both two and three flavors were examined to determine the order of the phase transition. The …
-
A study of the chiral phase transition in the non-linear sigma model
The finite temperature chiral phase transition is studied using the three dimensional nonlinear sigma model. Numerical simulations with the U(N) x U(N) and SU(N) x SU(N) flavor symmetries for both two and three flavors were examined to determine the order of the phase transition. The data from the …
-
The chiral phase transition of QCD with 2+1 flavors : a lattice study on Goldstone modes and universal scaling
This PhD thesis is concerned with the chiral phase transition of QCD with two degenerate light quark masses and a strange quark mass close to its physical value. We analyze the quark mass dependence of the chiral condensate and chiral susceptibilities close to the transition temperature. The …
-
Thermodynamics of 5-flavor QCD
This thesis investigates the chiral phase transition in Quantum Chromodynamics (QCD) with five mass degenerate quark flavors. After performing lattice QCD simulations, I discuss measurements of the chiral condensate at small masses and classify the chiral phase transition. The data analysis is done …
-
Phase transitions in lattice gauge theories
… U(l) lattice Higgs model are reviewed. The phases of the system are discussed in terms of these excitations and the results of Monte Carlo studies summarized. New results are then presented clarifying the role of topological excitations in the non-compact lattice version of the Abelian Higgs …
-
Spatial Structure of the Composite Particles in the 2 + 1 Dimensional U(1) Four-Fermi Model at Finite Chemical Potential
I examined the chiral phase transition in a 2 + 1 dimensional, U(1) symmetric, four-fermi model at finite chemical potential and zero temperature. The spatial structure (form factor) of the composite particle formed as a result of the breaking of the chiral symmetry is calculated under the 1/N …
-
Spatial structure of the composite particles in the 2+1 dimensional U(1) four-fermi model at finite chemical potential
I examined the chiral phase transition in a 2 + 1 dimensional, U(1) symmetric, four-fermi model at finite chemical potential and zero temperature. The spatial structure (form factor) of the composite particle formed as a result of the breaking of the chiral symmetry is calculated under the 1/N …
-
Chiral symmetry restoration in the three-dimensional four-fermion model at non-zero temperature and density
The phase structure of the three-dimensional four-fermion model with a Z2 chiral symmetry at non-zero temperature Tor non-zero chemical potential μ is investigated. The main purpose of the study is to serve as an orientation for the more complex problem of the chiral phase transition in Quantum …
-
Functional Renormalization Group Methods in Quantum Chromodynamics
… in small volumes. A comparison of our results to chiral perturbation theory and lattice QCD suggests that lattice QCD has not yet reached volume sizes for which chiral perturbation theory can be applied to extrapolate lattice results for low-energy observables. Phase transitions in QCD at finite …
-
Effective Actions for Strongly Interacting Fermionic Systems
… fermionic language proceeding into the SSB phase requires techniques beyond perturbation theory and renormalization group equations. Improvement comes from a description with BBS fields and elementary fields treated on equal footing. Yet, ``partial bosonization'' introduces an arbitrariness …