76 citations · 200 across the 13 of their papers we have counts for
14 papers
Constraining Ultralight Scalars with Black Hole Binary Mergers in Galactic Nuclei
Majed Khalaf, Eric Kuflik, Alessandro Lenoci +2
Ultralight scalars can form long-lived, macroscopic bound states around spinning black holes, known as superradiance clouds. These clouds provide an additional channel for energy d…
Minimal Proton-Mass Dark Matter
Majed Khalaf, Eric Kuflik, Alessandro Lenoci +2
We present a minimal dark matter scenario: a single complex scalar carrying baryon and lepton number, with no new exact stabilizing symmetry. Its leading interaction is a dimension…
Probing Dark Matter-Electron Interactions with Superconducting Qubits
Yonit Hochberg, Majed Khalaf, Noah Kurinsky +2
Quantum device measurements are powerful tools to probe dark matter interactions. Among these, transmon qubits stand out for their ability to suppress external noise while remainin…
Seasons of Dark Matter Freeze-In Shaped by the Weather of the Early Universe
Francesco D'Eramo, Alessandro Lenoci, Tommaso Sassi
Quantifying the imprints of freeze-in dark matter (DM) on cosmological structures requires knowledge of its phase-space distribution. We investigate how variations in the cosmologi…
Determining (All) Dark Matter-Electron Scattering Rates From Material Properties
Yonit Hochberg, Majed Khalaf, Alessandro Lenoci +1
We show that the scattering rate for any dark matter (DM) interaction with electrons in any target is proportional to several measurable material properties, encapsulated by a sing…
Self-Gravity in Superradiance Clouds: Implications for Binary Dynamics and Observational Prospects
Hyungjin Kim, Alessandro Lenoci
Spinning black holes could produce ultralight particles via the superradiance instability. These particles form a dense cloud around the host black hole, introducing new opportunit…
Dark Matter Freeze-In and Small-Scale Observables: Novel Mass Bounds and Viable Particle Candidates
Francesco D'Eramo, Alessandro Lenoci, Ariane Dekker
The suppression of cosmological structure at small scales is a key signature of dark matter (DM) produced via freeze-in in the low-mass regime. We present a comprehensive analysis…
Back to the phase space: thermal axion dark radiation via couplings to standard model fermions
Francesco D'Eramo, Alessandro Lenoci
We investigate the cosmological consequences of axion interactions with standard model fermions accurately and precisely. Our analysis is entirely based on a phase space framework…
Boson Cloud Atlas: Direct mass measurements of superradiance clouds near black holes
Majed Khalaf, Eric Kuflik, Alessandro Lenoci +1
Ultralight scalars emerge naturally in several motivated particle physics scenarios and are viable candidates for dark matter. While laboratory detection of such bosons is challeng…
Dark Radiation from the Primordial Thermal Bath in Momentum Space
Francesco D'Eramo, Fazlollah Hajkarim, Alessandro Lenoci
Motivated by the stunning projections for future CMB surveys, we evaluate the amount of dark radiation produced in the early Universe by two-body decays or binary scatterings with…
Probing an ultralight QCD axion with electromagnetic quadratic interaction
Hyungjin Kim, Alessandro Lenoci, Gilad Perez +1
The axion-gluon coupling is the defining feature of the QCD axion. This feature induces additional and qualitatively different interactions of the axion with standard model particl…
Adiabatically compressed wave dark matter halo and intermediate-mass ratio inspirals
Hyungjin Kim, Alessandro Lenoci, Isak Stomberg +1
The adiabatic growth of a central massive black hole could compress the surrounding dark matter halo, leading to a steeper profile of the dark matter halo. This phenomenon is calle…
Gravitational Focusing of Wave Dark Matter
Hyungjin Kim, Alessandro Lenoci
A massive astrophysical object deforms a local distribution of dark matter, resulting in a local overdensity of dark matter. This phenomenon is often referred to as gravitational f…
Lower Mass Bounds on FIMP Dark Matter Produced via Freeze-In
Francesco D'Eramo, Alessandro Lenoci
Feebly Interacting Massive Particles (FIMPs) are dark matter candidates that never thermalize in the early universe and whose production takes place via decays and/or scatterings o…