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astro-ph.CO2025
Radiatively Corrected Starobinsky Inflation and Primordial Gravitational Waves in Light of ACT Observations
Waqas Ahmed, Mansoor Ur Rehman
Nonminimal coupling between the inflaton and the Ricci scalar plays a crucial role in shaping the predictions of single-field inflationary models. While a quartic potential with su…
astro-ph.CO2024★ 3 cited
Primordial Black Holes and Second-order Gravitational Waves in Axion-like Hybrid Inflation
Waqas Ahmed, Anish Ghoshal, Umer Zubair
We investigate the possibility that primordial black holes (PBHs) can be formed from large curvature perturbations generated during the waterfall phase transition in a hybrid infla…