112 citations · 307 across the 23 of their papers we have counts for
18 papers · 1 filter
Searching for heavy charged relics in the Earth
Reza Ebadi, Peter W. Graham, Surjeet Rajendran +2
We propose a method for detecting an ambient density of heavy, electrically-charged particles. Such particles would impact the Earth, lose energy in terrestrial matter, and become…
Gradient-Produced Neutrinos
Erwin H. Tanin, Yikun Wang
Sufficiently strong electric fields can produce charged-particle pairs via the Schwinger effect. We argue that steep matter-density gradients, as can arise in neutron star interior…
Narrowing Down Sources of High-Frequency Gravitational Waves
Asher Berlin, Dawid Brzeminski, Erwin H. Tanin
Detecting gravitational waves above 100 kHz would constitute a major discovery, as any observable signal would have to arise from new physics within the late universe. Although man…
Thermal Damping of Mass-Modulating Scalars
Abhishek Banerjee, Ngan H. Nguyen, Erwin H. Tanin
The cosmological evolution of a scalar field is shaped by Hubble damping. Any non-gravitational couplings of the scalar with the primordial thermal bath generically contribute addi…
Cosmological Limits on Strong Dark Forces
Peter W. Graham, Harikrishnan Ramani, Olivier Simon +1
We showcase cosmology's ability to constrain long-range forces between dark matter particles. Specifically, we consider a fermionic dark matter interacting via a Yukawa-coupled lig…
Thermal Damping of Neutrino-Coupled Scalar Dark Matter
Abhishek Banerjee, Ngan H. Nguyen, Erwin H. Tanin
We point out that ultralight scalar dark matter that modulates neutrino masses can be significantly thermal damped by cosmic neutrinos in the early universe. This dissipative effec…
Gravothermal Pile-Up of Collisional Dark Matter Around Compact Objects
Reza Ebadi, Erwin H. Tanin
The dark matter may consist of multiple species that interact differently. We show that a species that is cosmologically subdominant but highly collisional can pile up and become d…
Direct Deflection of Millicharged Radiation
Asher Berlin, Surjeet Rajendran, Harikrishnan Ramani +1
Millicharged particles are generic in theories of dark sectors. A cosmic or local abundance of them may be produced by the early universe, stellar environments, or the decay or ann…
Indirect Searches for Ultraheavy Dark Matter in the Time Domain
David E. Kaplan, Xuheng Luo, Ngan H. Nguyen +2
Dark matter may exist today in the form of ultraheavy composite bound states. Collisions between such dark matter states can release intense bursts of radiation that includes gamma…
Fireball anti-nucleosynthesis
Michael A. Fedderke, David E. Kaplan, Anubhav Mathur +2
The tentative identification of approximately ten relativistic anti-helium cosmic-ray events at AMS-02 would, if confirmed, challenge our understanding of the astrophysical synthes…
Spectra of axions emitted from main sequence stars
Ngan H. Nguyen, Erwin H. Tanin, Marc Kamionkowski
We compute the detailed energy spectra of axions with two-photon coupling produced in stellar cores over a wide range of stellar masses. We focus on main sequence stars and base ou…
Spectral distortions of astrophysical blackbodies as axion probes
Jae Hyeok Chang, Reza Ebadi, Xuheng Luo +1
Recent studies reveal that more than a dozen of white dwarfs displaying near-perfect blackbody spectra in the optical range have been lurking in the Sloan Digital Sky Survey catalo…
Electroweak Asymmetric Early Universe via a Scalar Condensate
Jae Hyeok Chang, María Olalla Olea-Romacho, Erwin H. Tanin
Finite temperature effects in the Standard Model tend to restore the electroweak symmetry in the early universe, but new fields coupled to the higgs field may as well reverse this…
Dark Solar Wind
Jae Hyeok Chang, David E. Kaplan, Surjeet Rajendran +2
We study the solar emission of light dark sector particles that self-interact strongly enough to self-thermalize. The resulting outflow behaves like a fluid which accelerates under…
Thermal Perturbations from Cosmological Constant Relaxation
Lingyuan Ji, David E. Kaplan, Surjeet Rajendran +1
We probe the cosmological consequences of a recently proposed class of solutions to the cosmological constant problem. In these models, the universe undergoes a long period of infl…
Ultra-Heavy Dark Matter Search with Electron Microscopy of Geological Quartz
Reza Ebadi, Anubhav Mathur, Erwin H. Tanin +8
Self-interactions within the dark sector could clump dark matter into heavy composite states with low number density, leading to a highly suppressed event rate in existing direct d…
Clocking Out Superradiance Limits
Anubhav Mathur, Surjeet Rajendran, Erwin H. Tanin
The superradiant instability of black hole space-times has been used to place limits on ultra-light bosonic particles. We show that these limits are model dependent. While the init…
Damping of an oscillating scalar field indirectly coupled to a thermal bath
Erwin H. Tanin, Ewan D. Stewart
The damping process of a homogeneous oscillating scalar field that indirectly interacts with a thermal bath through a mediator field is investigated over a wide range of model para…