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In the framework of the constituent quark model the exclusive pair productionof the charmed mesons in the photon-photon interaction is calculated. Thecomparison of these predictions with the ones of the heavy quark effectivetheory is performed. It is shown, that the light valence quark of D-meson playsthe essential role not only in the hadronization process, but also in theproduction of the heavy c-quark. Moreover, it is shown, that because of thestrong interaction between the initial photon field and the light quark chargethe similar situation is kept even in the limit (m_{Q}\to \infty), whence it isconcluded, that the application of the heavy quark effective theory in the caseof the photon-photon interaction is not valid because it does not take intoaccount one of the dominant mechanisms of the heavy meson production.Comment: 15 pages, 6 figure

Production of a charmed-meson pair in photon-photon interaction