Umer Zubair

collaborators

3 papers

astro-ph.IM2026

How Low Can We Go? Minimum Spectroscopic Requirements For Supernova Subtype Classification

Willow Fox Fortino, Federica B. Bianco, Maryam Modjaz +2

Millions of supernovae will be discovered with the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST). As a result, spectrographs around the world will have to make d…

astro-ph.CO2025

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…

hep-ph2025

Smooth $I^¼$ -Hybrid and Non-Minimal Higgs Inflation in $S U (4)_{C} \times S U (2)_{L} \times S U (2)_{R}$ With Observable Gravitational Waves

Umer Zubair

We propose to study a smooth variant of the $I^¼$ -hybrid inflation model and a non-minimal Higgs model of inflation with quartic non-minimal coupling between the Higgs field and gra…

How Low Can We Go? Minimum Spectroscopic Requirements For Supernova Subtype Classification

Primordial Black Holes and Second-order Gravitational Waves in Axion-like Hybrid Inflation

Smooth I^¼-Hybrid and Non-Minimal Higgs Inflation in SU(4)C​×SU(2)L​×SU(2)R​ With Observable Gravitational Waves

Smooth $I^¼$ -Hybrid and Non-Minimal Higgs Inflation in $S U (4)_{C} \times S U (2)_{L} \times S U (2)_{R}$ With Observable Gravitational Waves