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VOLUME 65 | ISSUE 9 | PAGE 673
A correction to the Hamiltonian of the QCD string with quarks due to the Rigidity term
The action of the gluodynamics string, obtained in Ref.[l], is used for the derivation of the correction, arising due to the rigidity term, to the Hamiltonian of the quark-antiquark system, which was obtained in Refs. [2,3]. This correction contains additional contributions to the orbital momentum of the system and several higher derivative operators. With the help of the obtained Hamiltonian a rigid string-induced term in the Hamiltonian of the relativistic quark model is evaluated for the case of large masses of a quark and antiquark. PACS: 12.39.Ki