QCD/String holographic mapping and glueball mass spectrumH. Boschi-Filho and N.R.F. Braga
Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, RJ 21945-970, Brazil email@example.com
(Received: 10 September 2003 / Revised version: 19 November 2003 / / Published online: 9 January 2004)
Recently Polchinski and Strassler reproduced the high energy QCD scaling at fixed angles from a gauge string duality inspired by the AdS/CFT correspondence. In their approach a confining gauge theory is taken as approximately dual to an AdS space with an IR cut-off. Considering such an approximation (AdS slice) we found a one to one holographic mapping between bulk and boundary scalar fields. Associating the bulk fields with dilatons and the boundary fields with glueballs of the confining gauge theory we also found the same high energy QCD scaling. Here, using this holographic mapping, we give a simple estimate for the mass ratios of the glueballs assuming the AdS slice approximation to be valid at low energies. We also compare these results to those coming from supergravity and lattice QCD.
© Società Italiana di Fisica, Springer-Verlag 2004