641 citations · 5.9k across the 98 of their papers we have counts for
98 papers
Perturbations of Charged Black Holes with Higher-Order Interactions
Oleksandr S. Stashko, Roman A. Konoplya, Mark P. Hertzberg
We study linear gravitational perturbations and the corresponding quasinormal-mode spectra of electrically and magnetically charged black holes in the presence of higher-order corr…
Constraints on Stable Scalar-Tensor Dark Energy from DESI Data and Solar System Tests
Husam Adam, Mark P. Hertzberg, Daniel Jiménez-Aguilar
We investigate the viability of scalar-tensor (quintessence) models of dark energy with a quartic polynomial nonminimal coupling to gravity and a linear scalar potential. The polyn…
Theoretical and Observational Bounds on Dynamical Chern-Simons Gravity as an Effective Field Theory
Alexander Cassem, Mark P. Hertzberg
Gravitational effective theories are essential for characterizing the space of deviations from General Relativity (GR). Testing these theories against fundamental principles, such…
Effects of New Forces on Scalar Dark Matter Solitons
Alize Sucsuzer, Mark P. Hertzberg, Michiru Uwabo-Niibo
New long range forces acting on ordinary matter are highly constrained. However it is possible such forces act on dark matter, as it is less constrained observationally. In this wo…
Comparing Minimal and Non-Minimal Quintessence Models to 2025 DESI Data
Husam Adam, Mark P. Hertzberg, Daniel Jiménez-Aguilar +1
In this work we examine the 2025 DESI analysis of dark energy, which suggests that dark energy is evolving in time with an increasing equation of state . We explore a wide range…
Precision Unitarity Calculations in Inflationary Models
Thomas Steingasser, Mark P. Hertzberg, David I. Kaiser
We revisit perturbative unitarity in scalar field inflation with a nonminimal coupling, with Higgs inflation serving as the most prominent example. Although such models are phenome…