62 citations · 305 across the 14 of their papers we have counts for
14 papers
New bounds on light scalars from the tip of the red giant branch
Natnael Debru, Audrey Fung, Saniya Heeba +3
Light, weakly coupled particles can be copiously produced in the hot and dense interior of stars, and the resulting energy loss can leave observable imprints on entire stellar popu…
Direct Detection of the Millicharged Background
Ella Iles, Saniya Heeba, Katelin Schutz
We show that dark matter direct detection experiments are sensitive to the existence of particles with a small effective charge (for instance, via couplings to a kinetically mixed,…
New bounds on light millicharged particles from the tip of the red-giant branch
Audrey Fung, Saniya Heeba, Qinrui Liu +3
Stellar energy loss is a sensitive probe of light, weakly coupled dark sectors, including ones containing millicharged particles (MCPs). The emission of MCPs can affect stellar evo…
Resonant Pseudo-Dirac Dark Matter as a Sub-GeV Thermal Target
Nirmalya Brahma, Saniya Heeba, Katelin Schutz
Dark matter (DM) could be a pseudo-Dirac thermal relic with a small mass splitting that is coupled off-diagonally to a kinetically mixed dark photon. This model, particularly in th…
Inelastic Freeze-in
Saniya Heeba, Tongyan Lin, Katelin Schutz
Dark matter (DM) could be a nonthermal relic that freezes in from extremely weak, sub-Hubble annihilation and decay of Standard Model (SM) particles. The case of Dirac DM freezing…
Endothermic self-interacting dark matter in Milky Way-like dark matter haloes
Stephanie O'Neil, Mark Vogelsberger, Saniya Heeba +9
Self-interacting dark matter (SIDM) offers the potential to mitigate some of the discrepancies between simulated cold dark matter (CDM) and observed galactic properties. We introdu…
Snowmass2021 Cosmic Frontier White Paper: Dark Matter Physics from Halo Measurements
Keith Bechtol, Simon Birrer, Francis-Yan Cyr-Racine +41
The non-linear process of cosmic structure formation produces gravitationally bound overdensities of dark matter known as halos. The abundances, density profiles, ellipticities, an…
Early-Universe Model Building
Pouya Asadi, Saurabh Bansal, Asher Berlin +37
Theoretical investigations into the evolution of the early universe are an essential part of particle physics that allow us to identify viable extensions to the Standard Model as w…
The ups and downs of inelastic dark matter: Electron recoils from terrestrial upscattering
Timon Emken, Jonas Frerick, Saniya Heeba +1
The growing interest in the interactions between dark matter particles and electrons has received a further boost by the observation of an excess in electron recoil events in the X…
Freezing-in a hot bath: resonances, medium effects and phase transitions
Torsten Bringmann, Saniya Heeba, Felix Kahlhoefer +1
Relic density calculations of dark matter freezing out from the primordial plasma have reached a high level of sophistication, with several numerical tools readily available that m…
The Semi-Classical Regime for Dark Matter Self-Interactions
Brian Colquhoun, Saniya Heeba, Felix Kahlhoefer +2
Many particle physics models for dark matter self-interactions - motivated to address long-standing challenges to the collisionless cold dark matter paradigm - fall within the semi…
Resonant Sub-GeV Dirac Dark Matter
Elias Bernreuther, Saniya Heeba, Felix Kahlhoefer
We study the phenomenology and detection prospects of a sub-GeV Dirac dark matter candidate with resonantly enhanced annihilations via a dark photon mediator. The model evades cosm…
Probing the freeze-in mechanism in dark matter models with gauge extensions
Saniya Heeba, Felix Kahlhoefer
New gauge bosons at the MeV scale with tiny gauge couplings (so-called dark photons) can be responsible for the freeze-in production of dark matter and provide a clear target for p…
Freeze-in production of decaying dark matter in five steps
Saniya Heeba, Felix Kahlhoefer, Patrick Stöcker
We study the cosmological evolution and phenomenological properties of scalar bosons in the keV to MeV range that have a tiny mixing with the Standard Model Higgs boson. The mixing…