Rouzbeh Allahverdi

Jun 12, 2023 | link.aps.org | Rouzbeh Allahverdi

Abstract We present a minimal extension of the standard model that includes a long-lived fermion with weak-scale mass and an O(GeV) fermionic dark matter candidate both of which are coupled to quarks. Decays of a TeV-scale colored scalar in a radiation-dominated phase bring the former to a thermal abundance while also producing dark matter. The long-lived fermion then dominates the energy density of the Universe and drives a period of early matter domination.

May 12, 2023 | link.aps.org | Stuart Ward |Arash Mafi |Rouzbeh Allahverdi

Abstract Optical solitons are known to be classically stable objects which are robust to perturbations. In this work we show that due to quantum-mechanical effects, an optical soliton that is initially in a classical soliton coherent state will shed photons into the continuum and hence decay.