Superconductivity in a binary boson- fermion mixture with weak interaction

A concept describing the origin of the pseudogap phase of high-Tc superconducting cuprates is discussed. Based on the idea about electron-composite boson mixture, existing below some value Tp in cuprates, first, an analytical expression for Tp is obtained. It is shown that Tp depends on interaction parameter responsible for two electron-composite boson transformation, as well on the boson formation energy. Second, the composite boson condensation temperature Tc, determined as a one below which the density of condensed bosons just ceases to be zero, is found. The reason why the behaviors of Tp and Tc in dependence on the interaction parameter may be so different is addressed.