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HK: Fachverband Physik der Hadronen und Kerne

HK 42: Theorie

HK 42.4: Talk

Thursday, March 15, 2007, 12:00–12:15, C

Hadronic spectrum in AdS/QCD with linear confinement — •Michael Beyer¹ and Tobias Frederico² — ¹Institut für Physik, U. Rostock, Rostock — ²ITA, CTA, Sao Jose dos Campos, Brazil

We compute the spectrum of light mesons and baryons hadrons within QCD-AdS/CFT with string modes defined on $AdS_5 \times S^5$ space which has conformal behavior at short distances. The linear confinement of colorless states is modelled through the effective mass of the string fluctuations around the AdS background, which leads to conformal invariance breaking at large distances corresponding the infrared QCD scale. The effective mass includes the conformal dimension of the interpolating operator of the lowest hadron Fock component identifying the string mode and the corresponding orbital excitation. In the model, the hadronic mass squared scales with radial and and orbital angular momentum excitations universally according to $M^2\sim (N+L)$ incorporating the empirical observations. Supported by DAAD/CAPES. TF thanks FAPESP and CNPq for partial financial support.