[SEMINARI] SEMINAR: Frederic Jugeau, AdS/QCD : Towards a holographic description of QCD. The particular case of the glueballs

[German Rodrigo Garcia]

AdS/QCD : Towards a holographic description of QCD. The particular case of 
the glueballs

Frederic Jugeau
INFN Bari
Wednesday, 21 of March of 2007     12:00 PM
IFIC's Seminar

Abstract

A breakthrough in the attempt to understand non-perturbative Yang-Mills 
theories came with the AdS/CFT conjecture, proposed by Maldacena, that a 
connection could be established between the large N limit of a 
superconformal SU(N) gauge theory defined in d dimensions and a 
supergravity theory living on a d+1 anti-de Sitter space (AdS). In this 
talk, I will attempt to expose how it is possible to extend AdS/CFT 
correspondence to QCD (being neither SUSY nor conformal so that its 
gravity dual theory is unknown). I will pursue by describing a holographic 
model of QCD for glueballs. Especially, I will show that it is necessary 
to modify the AdS geometry in order to recover the spectrum hierarchy 
between the scalar and pseudoscalar glueballs.