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613 papers · 1 filter
Numerical Backreaction and Finite-Time Energy Transfer in Post-Recombination Magnetogenesis from Ultralight Dark Matter
Aviv David, Robert Brandenberger
We study gauge-field production in a post-recombination magnetogenesis scenario driven by an ultralight pseudoscalar dark matter field coupled to electromagnetism. Previous ana…
ALP Dark Matter, Cosmological Magnetic Fields and the Direct Collapse Black Hole Formation Scenario
Ashu Kushwaha, Robert Brandenberger
Assuming that dark matter is an ultralight pseudoscalar particle which couples to electromagnetism like an axion (an ALP), we demonstrate that the coupling of the cosmological magn…
Probing Bose-enhanced Inflaton Decay with Gravitational Waves
Nicolás Bernal, Quan-feng Wu, Xun-Jie Xu +1
We investigate cosmic reheating dynamics in the presence of a transient condensate formed by bosonic decay products of the inflaton. We show that the emergence of such a condensate…
A Non-Inflationary Axion and ALP Misalignment Mechanism
Robert Brandenberger
Based on considerations of quantum gravity, global symmetries which lead to axions as pseudo Nambu-Goldstone bosons after low scale symmetry breaking cannot be exact at the Planck…
The effect of recoils on soft-drop-groomed observables in -tagged jets in a multistage approach
Y. Tachibana, C. Sirimanna, A. Majumder +49
We investigate medium-induced modifications to jet substructure observables that characterize hard components in central Pb-Pb collisions at ~TeV. Using a multi…
Bounds on the bubble wall velocity
Wen-Yuan Ai, Benoit Laurent, Jorinde van de Vis
Determining the bubble wall velocity in first-order phase transitions is a challenging task, requiring the solution of (coupled) equations of motion for the scalar field and Boltzm…