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| Identifier |
000381462 |
| Title |
Holography and the plase structure of gravity theories |
| Alternative Title |
Ολογραφία και η δομή φάσεων των βαρυτικών θεωριών |
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Author
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Ιατράκης, Ιωάννης
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Thesis advisor
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Κυρίτσης, Ηλίας
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Reviewer
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Τσάμης, Ηλίας
Πέτκου, Αναστάσιος
Τομαράς, Θεόδωρος
Παπανικολάου, Νικόλαος
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| Abstract |
The gauge/gravity duality is used in order to construct effective holographic models that describe strongly coupled QCD. Assuming Nf<<Nc, a holographic model is built that describes the physics of the meson sector of strong interactions, such as chiral symmetry breaking, chiral symmetry restoration above confinement/deconfinement phase transition and the meson mass spectrum. This model is also used to study the transverse part of the vector-axial vector flavor current correlator in the presence of weak external electric field, which is important for the calculation of the two-loop electroweak radiative corrections to the muon anomalous magnetic moment. It is then generalized to describe the spectrum of QCD in the Veneziano limit of large Nf and Nc but at fixed x = Nf / Nc. The main results include discrete and gapped spectrum for x<xc, where xc is the conformal transition point. As x→xc all the parameters of the theory with non
trivial mass dimension approach zero following Miransky scaling. The Chern-Simons
diffusion rate, ΓCS is studied in the context of Improved Holographic QCD model. ΓCS is an important quantity for the chiral magnetic effect in the quark-gluon plasma and is proportional to the zero-momentum, zero-frequency limit of the imaginary part of the retarded two-point function of the CP-odd operator tr [F∧F], where F is the YM field strength.
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| Language |
English |
| Subject |
ADS/CFT |
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Quantum chromodynamics |
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Κβαντική χρωμοδυναμική |
| Issue date |
2013-11-14 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Doctoral theses
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Type of Work--Doctoral theses
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| Views |
881 |
Holography and the plase structure of gravity theories
