Naked Singularity in a Modified Gravity Theory

The cosmological constant induced by qantum fluctuation of the graviton on a given background is considered as a tool for building a spectrum of different geometries. In particular, we apply the method to the Schwarzschild background with positive and negative mass parameter. In this way, we put on the same level of comparison the related naked singularity (?M) and the positive mass wormhole. We discuss how to extract information in the context of a f (R) theory. We use the Wheeler-De Witt equation as a basic equation to perform such an analysis regarded as a Sturm-Liouville problem. The application of the same procedure used for the ordinary theory, namely f (R) = R, reveals that to this approximation level, it is not possible to classify the Schwarzschild and its naked partner into a geometry spectrum.