The role of gauge fields in cold and dense quark matter [Elektronische Ressource] / von Jorge Noronha

The Role of Gauge Fieldsin Cold and Dense Quark MatterDissertationzur Erlangung des Doktorgradesder Naturwissenschaftenvorgelegt beim Fachbereich Physikder Johann Wolfgang Goethe-Universit atin Frankfurt am MainvonJorge Noronhaaus Pernambuco, BrasilienFrankfurt am Main, 2007(D 30)2vom Fachbereich Physik der Johann Wolfgang Goethe{Universit atals Dissertation angenommen.Dekan: Prof. Dr. W. A m usGutachter: Prof. Dr. D.-H. Rischke, HD Dr. J. Scha ner-Bielic hDatum der Disputation: 3.12.2007AbstractIn this thesis we investigate the role played by gauge elds in providing new observable signaturesthat can attest to the presence of color superconductivity in neutron stars. We show that thermalgluon uctuations in color- a vor locked superconductors can substantially increase their criticaltemperature and also change the order of the transition, which becomes a strong rst-orderphase transition. Moreover, we explore the e ects of strong magnetic elds on the propertiesof color- a vor locked superconducting matter. We nd that both the energy gaps as well asthe magnetization are oscillating functions of the magnetic eld. Also, it is shown that the can be so strong that homogeneous quark matter becomes metastable for a rangeof parameters. This points towards the existence of magnetic domains or other types of magneticinhomogeneities in the hypothesized quark cores of magnetars.