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We use an SU(2) mean-field theory approach with input from variationalwavefunctions of the t-J model to study the electronic spectra in the pseudogapphase of cuprates. In our model, the high-temperature state of underdopedcuprates is realized by classical fluctuations of the order parameter betweenthe d-wave superconductor and the staggered-flux state. Spectral functions ofthe intermediate and the averaged states are computed and analyzed. Our modelpredicts a photoemission spectrum with an asymmetric gap structureinterpolating between the superconducting gap centered at the Fermi energy andthe asymmetric staggered-flux gap. This asymmetry of the gap changes sign atthe point where the Fermi surface crosses the diagonal (\pi,0)-(0,\pi).

SU(2) approach to the pseudogap phase of high-temperature superconductors: electronic spectral functions