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2008

Heavy baryon spectroscopy in the QCD string model

Grach, I. L., Narodetskii, I. M., Trusov, M. A. et al.

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QCD string model formulated in the framework of the Field Correlator Method (FCM) in QCD is employed to calculate the masses of $\Sigma_c$, $\Xi_c$ and recently observed at Tevatron $\Sigma_b$, $\Xi_b$ baryons and their orbital excitations.

The auxiliary field formalism allows one to write a simple local form of the effective Hamiltonian for the three quark system, which comprises both confinement and relativistic effects, and contains only universal parameters: the string tension $\sigma$, the strong coupling constant $\alpha_s$, and the bare (current) quark masses $m_i$.
We calculate the hyperfine splitting with account of the both perturbative and non--perturbative spin-spin forces between quarks in a baryon.
For the orbital excitations we estimate the string correction for the confinement potential - the leading correction to the contribution of the proper inertia of the rotating string.

Heavy baryon spectroscopy in the QCD string model · Around

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