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207 papers · 1 filter
Planck Constraint on Relic Primordial Black Holes
Steven Clark, Bhaskar Dutta, Yu Gao +2
We investigate constraints on the abundance of primordial black holes (PBHs) in the mass range 10^{15}-10^{17} g using data from the Cosmic Microwave Background (CMB) and MeV extra…
Excited-State Structure Modifications Due to Molecular Substituents and Exciton Scattering in Conjugated Molecules
Hao Li, Michael J. Catanzaro, Sergei Tretiak +1
Attachment of chemical substituents (such as polar moieties) constitutes an efficient and convenient way to modify physical and chemical properties of conjugated polymers and oligo…
Generalized Tonnetze
Michael J. Catanzaro
We study a generalization of the classical Riemannian Tonnetz to N-tone equally tempered scales (for all N) and arbitrary triads. We classify all the spaces that result. The torus…
Counting the number of excited states in organic semiconductor systems using topology
Michael J. Catanzaro, Tian Shi, Sergei Tretiak +1
Exciton Scattering (ES) theory attributes excited electronic states to standing waves in quasi-one-dimensional molecular materials by assuming a quasi-particle picture of optical e…
Superconvergence analysis of DG-FEM based on the polynomial preserving recovery for Helmholtz equation with high wave number
Yu Du, Zhimin Zhang
We study superconvergence property of the linear discontinuous Galerkin finite element method with the polynomial preserving recovery (PPR) and Richardson extrapolation for the two…
Indirect Signals from Solar Dark Matter Annihilation to Long-lived Right-handed Neutrinos
Rouzbeh Allahverdi, Yu Gao, Bradley Knockel +1
We study indirect detection signals from solar annihilation of dark matter (DM) particles into light right-handed (RH) neutrinos with a mass in a GeV range. These RH neutrino…