Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-11-28
Eur.Phys.J.A35:81-133,2008
Physics
High Energy Physics
High Energy Physics - Theory
120 pages, 32 pdf figures, references added
Scientific paper
10.1140/epja/i2007-10540-1
We review recent progress in studying mesons within gauge/gravity duality, in the context of adding flavour degrees of freedom to generalizations of the AdS/CFT correspondence. Our main focus is on the `top-down approach' of considering models constructed within string theory. We explain the string-theoretical constructions in detail, aiming at non-specialists. These give rise to a new way of describing strongly coupled confining large N gauge gauge theories similar to large N QCD. In particular, we consider gravity dual descriptions of spontaneous chiral symmetry breaking, and compare with lattice results. A further topic covered is the behaviour of flavour bound states in finite temperature field theories dual to a gravity background involving a black hole. We also describe the `bottom up' phenomenological approach to mesons within AdS/QCD. -- Some previously unpublished results are also included.
Erdmenger Johanna
Evans Nick
Kirsch Ingo
Threlfall Ed
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