On the YM and QCD spectra from five dimensional strings

Understand

We consider a non-critical five dimensional string setup which could provide a dual description of QCD in the limit of large number of colors and flavors.

• The model corresponds to N_c color D3-branes and N_f D4/anti D4-brane pairs supporting flavor degrees of freedom.
• The matching of the string model spectrum with the dual field theory one is considered.
• We discuss the consequences of the possible matching of the gravity modes with the light glueballs and the interpretation of the brane spectrum in Yang-Mills and QCD.