3 papers
hep-ph2023
Signatures of Primordial Energy Injection from Axion Strings
Joshua N. Benabou, Malte Buschmann, Soubhik Kumar +2
Axion strings are horizon-size topological defects that may be produced in the early Universe. Ultra-light axion-like particles may form strings that persist to temperatures below…
hep-th2023
Dissipative Inflation via Scalar Production
Paolo Creminelli, Soubhik Kumar, Borna Salehian +1
We describe a new mechanism that gives rise to dissipation during cosmic inflation. In the simplest implementation, the mechanism requires the presence of a massive scalar field wi…
hep-ph2023
Probing Cosmological Particle Production and Pairwise Hotspots with Deep Neural Networks
Taegyun Kim, Jeong Han Kim, Soubhik Kumar +3
Particles with masses much larger than the inflationary Hubble scale, , can be pair-produced non-adiabatically during inflation. Due to their large masses, the produced partic…