576 citations · 3.7k across the 90 of their papers we have counts for
90 papers
Gravitational Waves from Multiple First-Order Phase Transitions in a Scenario with Early Matter Domination
Rouzbeh Allahverdi, Fazlollah Hajkarim
Non-standard cosmological histories with epochs of early matter domination (EMD) arise in various top-down models of the early universe. Typically, in the latter stage of EMD, temp…
Gravitational wave signatures of primordial black hole accretion during early matter domination
Rouzbeh Allahverdi, James B. Dent, Ngo Phuc Duc Loc +1
We present a scenario in which primordial black holes (PBHs) form in a post-inflationary radiation-dominated (RD) phase and then experience significant accretion during a phase of…
Conversations and Deliberations: Non-Standard Cosmological Epochs and Expansion Histories
Brian Batell, Keith R. Dienes, Brooks Thomas +17
This document summarizes the discussions which took place during the PITT-PACC Workshop entitled "Non-Standard Cosmological Epochs and Expansion Histories," held in Pittsburgh, Pen…
Insights from Binary Pulsars and Laboratories into Baryon Number Violation: Implications for GeV Dark Matter
Rouzbeh Allahverdi, Adrian Thompson, Mohammadreza Zakeri
Rare processes in laboratory and within astrophysical environments can be highly sensitive probes of baryon-number violating interactions at the TeV scale. We demonstrate the power…
Enhanced Dark Matter Abundance in First-Order Phase Transitions
Rouzbeh Allahverdi, Cash Hauptmann, Peisi Huang
We propose a novel scenario to obtain the correct relic abundance for thermally under-produced dark matter. This scenario utilizes a strongly first-order phase transition at temper…
Dark matter from mediator decay in early matter domination
Rouzbeh Allahverdi, Ngo Phuc Duc Loc, Jacek K. Osiński
We study dark matter production from mediator decays in scenarios with an epoch of early matter domination. Particles that mediate interactions between dark matter and the standard…