Shadow features and shadow bands in the paramagnetic state of cuprate superconductors

It is shown theoretically that magnetically induced shadow peaks in two types of photoemission experiments may occur under different conditions. For the type I experiments, I find that shadow bands in $A(\omega,\vec{k}_{Fixed})$ can exist only in the renormalized classical regime $\omega_{sf} \ll T$. It is only in the type II experiments that a shadow feature in $A(\omega_{Fixed},\vec{k})$ can exist at zero temperature. I find, however, that this shadow feature is too small to explain present experiments in B2212. The conditions for which shadow bands can be observed in photoemission are discussed