Embedding generalized CP symmetry in one zero texture neutrino mass models

In this study, we investigate one zero textures within the framework of generalized CP symmetry associated with the complex tribimaximal matrix. By combining these approaches, we derive predictive neutrino mass matrices and establish correlations between different parameters. Future long-baseline experiments, including NOFormula: see textA, DUNE and Hyper-Kamiokande, will provide a test of the predictions for the atmospheric mixing angle arising from this analysis. We also analyze the implications for neutrinoless double beta decay in the context of one-zero textures, in light of current and future experimental data. Our analysis indicates that the sum of the three neutrino masses in the inverted hierarchy is inconsistent with the cosmological bounds from Planck data (Formula: see text). In addition, constraints from the DESI/SDSSFormula: see textFormula: see textFormula: see text PantheonFormula: see textFormula: see textFormula: see textDES-SN dataset (Formula: see text) within the Formula: see textCDMFormula: see textFormula: see textFormula: see textFluid DRFormula: see textFormula: see textFormula: see textFormula: see text framework at 95% confidence level also disfavor the inverted hierarchy. In addition, constraints from the DESI experiment (Formula: see textFormula: see texteV) may rule out all matrices in the Formula: see text case except Formula: see text, and in the Formula: see text scenario except Formula: see text, Formula: see text and Formula: see text. Thus, the improved cosmological observations on Formula: see text shall have decisive implications for viability of this class of model.