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Holographic descriptions of large N gauge dynamics

Holographic descriptions of large N gauge dynamics
Holographic descriptions of large N gauge dynamics
We use the AdS/CFT correspondence to study different aspects of large N dynamics of gauge theories in the strongly coupled regime. We present three models designed to capture some of the physics present in QCD at low energies or QCD-type theories such as walking tecnhicolor. We use the D3/D7 system to study chiral symmetry breaking in two different contexts: In the first model we break chiral symmetry with an arbitrary running coupling which has a pion in its spectrum. We derive integral equations for the quark condensate and pion decay constant by matching our model to a low energy chiral lagrangian and discuss the implications for technicolor theories. In the second model we study the on set of chiral symmetry breaking at the edge of the conformal window in QCD in the Veneziano limit and show a BKT-type transition. Finally, in the context of AdS/QCD we extend the ”hard wall” model to include the tensor operator ¯φσμνψ dual to a two form satisfying a self duality condition and study numerically the spectrum of vector mesons.
Alvares, Raul
a6055bcb-6aee-4a28-af32-70b740d4adfa
Alvares, Raul
a6055bcb-6aee-4a28-af32-70b740d4adfa
Evans, Nicholas
33dfbb52-64dd-4c1f-9cd1-074faf2be4b3

Alvares, Raul (2013) Holographic descriptions of large N gauge dynamics. University of Southampton, Faculty of Physical and Applied Sciences, Doctoral Thesis, 116pp.

Record type: Thesis (Doctoral)

Abstract

We use the AdS/CFT correspondence to study different aspects of large N dynamics of gauge theories in the strongly coupled regime. We present three models designed to capture some of the physics present in QCD at low energies or QCD-type theories such as walking tecnhicolor. We use the D3/D7 system to study chiral symmetry breaking in two different contexts: In the first model we break chiral symmetry with an arbitrary running coupling which has a pion in its spectrum. We derive integral equations for the quark condensate and pion decay constant by matching our model to a low energy chiral lagrangian and discuss the implications for technicolor theories. In the second model we study the on set of chiral symmetry breaking at the edge of the conformal window in QCD in the Veneziano limit and show a BKT-type transition. Finally, in the context of AdS/QCD we extend the ”hard wall” model to include the tensor operator ¯φσμνψ dual to a two form satisfying a self duality condition and study numerically the spectrum of vector mesons.

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Published date: January 2013
Organisations: University of Southampton, Theoretical Partical Physics Group

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Local EPrints ID: 347732
URI: https://eprints.soton.ac.uk/id/eprint/347732
PURE UUID: 0e386b9e-d7da-403a-8ed3-abb932e1c7d1

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Date deposited: 28 Feb 2013 12:42
Last modified: 01 Aug 2018 16:32

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