78 citations · 184 across the 15 of their papers we have counts for
15 papers
Clustering of cosmic string loops within a Milky-way like halo
Itamar Allali, Mudit Jain, Shi Yan
Loops of cosmic string experience a recoil from anisotropic gravitational radiation, known as the rocket effect, which influences the extent to which they are captured by galaxies…
Axion Perturbations: A General Analytical Treatment
Itamar J. Allali, Priyesh Chakraborty, JiJi Fan +1
Cosmological data provides us two key constraints on dark matter (DM): it must have a particular abundance, and it must have an adiabatic spectrum of density perturbations in the e…
Cosmic ensions Indirectly Correlate with Reionization Optical Depth
Itamar J. Allali, Lingfeng Li, Praniti Singh +1
The reionization optical depth has interesting connections to existing cosmological anomalies. As first studied in the context of the Hubble tension in our previous…
Reionization and the Hubble Constant: Correlations in the Cosmic Microwave Background
Itamar J. Allali, Praniti Singh, JiJi Fan +1
Recently, the James Webb Space Telescope (JWST) has found early galaxies producing photons from more efficient ionization than previously assumed. This may suggest a reionization p…
The Juno Mission as a Probe of Long-Range New Physics
Praniti Singh, Shi Yan, Itamar J. Allali +2
Orbits of celestial objects, especially the geocentric and heliocentric ones, have been well explored to constrain new long-range forces beyond the Standard Model (SM), often refer…
Neutrino mass bounds from DESI 2024 are relaxed by Planck PR4 and cosmological supernovae
Itamar J. Allali, Alessio Notari
The recent DESI 2024 Baryon Acoustic Oscillations (BAO) measurements combined with the CMB data from the Planck 18 PR3 dataset and the Planck PR4+ACT DR6 lensing data, with a prior…
Cosmological probes of Dark Radiation from Neutrino Mixing
Itamar J. Allali, Daniel Aloni, Nils Schöneberg
Models of stepped dark radiation have recently been found to have an important impact on the anisotropies of the cosmic microwave background, aiding in easing the Hubble tension. I…
Reduced Hubble Tension in Dark Radiation Models after DESI 2024
Itamar J. Allali, Alessio Notari, Fabrizio Rompineve
We investigate the presence of extra relativistic degrees of freedom in the early Universe, contributing to the effective number of neutrinos , as $ΔN_\text{eff}\equi…
Dark Sectors with Mass Thresholds Face Cosmological Datasets
Itamar J. Allali, Fabrizio Rompineve, Mark P. Hertzberg
Interacting dark sectors may undergo changes in the number of their relativistic species during the early universe, due to a mass threshold (similar to changes in the Standard…
Reduced Axion Abundance from an Extended Symmetry
Itamar J. Allali, Mark P. Hertzberg, Yi Lyu
In recent work we showed that the relic dark matter abundance of QCD axions can be altered when the Peccei-Quinn (PQ) field is coupled to very light scalar/s, rendering the effecti…
Altered Axion Abundance from a Dynamical Peccei-Quinn Scale
Itamar J. Allali, Mark P. Hertzberg, Yi Lyu
We build a model in which the relic abundance of axions is altered from the standard misalignment mechanism, either increased or decreased, due to the presence of a new light scala…
Dark Sector to Restore Cosmological Concordance
Itamar J. Allali, Mark P. Hertzberg, Fabrizio Rompineve
We develop a new phenomenological model that addresses current tensions between observations of the early and late Universe. Our scenario features: (i) a decaying dark energy fluid…
General Relativistic Decoherence with Applications to Dark Matter Detection
Itamar J. Allali, Mark P. Hertzberg
Quantum mechanics allows for states in macroscopic superpositions, but they ordinarily undergo rapid decoherence due to interactions with their environment. A system that only inte…
Decoherence from General Relativity
Itamar J. Allali, Mark P. Hertzberg
It is of great interest to explore matter in nontrivial quantum arrangements, including Schrodinger cat-like states. Such states are sensitive to decoherence from their environment…
Gravitational Decoherence of Dark Matter
Itamar Allali, Mark P. Hertzberg
Decoherence describes the tendency of quantum sub-systems to dynamically lose their quantum character. This happens when the quantum sub-system of interest interacts and becomes en…