Quark interaction with an instanton liquid |
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| Authors: | G M Zinovjev S V Molodtsov A M Snigirev |
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| Institution: | (1) Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Metrologicheskaya 14b, 03143 Kiev-143, Ukraine;(2) Institute of Nuclear Physics, Moscow State University, Vorob'evy gory, Moscow, 119899, Russia;(3) Institute of Experimental and Theoretical Physics, Bol'shaya Cheremushkinskaya ul. 25, Moscow, 117259, Russia |
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| Abstract: | The effect of quarks on an instanton liquid through the excitation of adiabatic phonon-like modes in it is considered. An effective Lagrangian that includes a scalar color-singlet field interacting with quarks is derived, and the relevant generating functional is estimated in the tadpole approximation. The nature of this dynamical field as a mediator of interaction at soft momenta and its possible relationship with unusual properties of the sigma meson are discussed. |
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