187 citations · 1.2k across the 28 of their papers we have counts for
24 papers · 1 filter
Improved supernova bounds on CP-even scalars: cooling and decay constraints
Melissa Joseph, Samuel Liebersbach, Anirudhan A. Madathil +1
Supernovae provide among the most powerful probes of weakly-coupled new particles in the MeV mass range, where laboratory experiments lose sensitivity. In this work, we derive impr…
Vector Portals at Future Lepton Colliders
Sagar Airen, Edward Broadberry, Gustavo Marques-Tavares +1
We assess the sensitivity of future lepton colliders to weakly coupled vector dark portals (aka `` bosons'') with masses ranging from tens of GeV to a few TeV. Our analysis f…
Atomic Dark Matter, Interacting Dark Radiation, and the Hubble Tension
Manuel A. Buen-Abad, Zackaria Chacko, Ina Flood +3
We present a new class of interacting dark sector models that can address the Hubble tension. Interacting dark radiation (DR) has previously been put forward as a solution to the p…
Adiabatic Conversion of ALPs into Dark Photon Dark Matter
Edward Broadberry, Saurav Das, Anson Hook +1
We introduce a mechanism by which a misaligned ALP can be dynamically converted into a dark photon in the presence of a background magnetic field. An abundance of non-relativistic…
CMB Spectral Distortions from an Axion-Dark Photon-Photon Interaction
Anson Hook, Gustavo Marques-Tavares, Clayton Ristow
The presence of a plethora of light spin 0 and spin 1 fields is motivated in a number of BSM scenarios, such as the axiverse. The study of the interactions of such light bosonic fi…
Multimessenger Constraints on Radiatively Decaying Axions from GW170817
Melissa Diamond, Damiano F. G. Fiorillo, Gustavo Marques-Tavares +2
The metastable hypermassive neutron star produced in the coalescence of two neutron stars can copiously produce axions that radiatively decay into ~MeV photons. T…
Axion-sourced fireballs from supernovae
Melissa Diamond, Damiano F. G. Fiorillo, Gustavo Marques-Tavares +1
New feebly interacting particles would emerge from a supernova core with 100-MeV-range energies and produce -rays by subsequent decays. These would contribute to the diffuse cos…
TF08 Snowmass Report: BSM Model Building
Patrick J. Fox, Graham D. Kribs, Hitoshi Murayama +53
We summarize the state of Beyond the Standard Model (BSM) model building in particle physics for Snowmass 2021, focusing mainly on several whitepaper contributions to BSM model bui…
Stepped Partially Acoustic Dark Matter, Large Scale Structure, and the Hubble Tension
Manuel A. Buen-Abad, Zackaria Chacko, Can Kilic +2
We propose a new interacting dark sector model, Stepped Partially Acoustic Dark Matter (SPartAcous), that can simultaneously address the two most important tensions in current cosm…
Some open questions in axion theory
Prateek Agrawal, Kim V. Berghaus, JiJi Fan +3
This white paper collects some open questions in several different aspects of axion theories. The questions are related to quantization of axion couplings, axion-magnetic monopole…
Precision Early Universe Cosmology from Stochastic Gravitational Waves
Dawid Brzeminski, Anson Hook, Gustavo Marques-Tavares
The causal tail of stochastic gravitational waves can be used to probe the energy density in free streaming relativistic species as well as measure and beta functions…
Dark Matter In Extreme Astrophysical Environments
Masha Baryakhtar, Regina Caputo, Djuna Croon +37
Exploring dark matter via observations of extreme astrophysical environments -- defined here as heavy compact objects such as white dwarfs, neutron stars, and black holes, as well…
Supernova constraints on an axion-photon-dark photon interaction
Anson Hook, Gustavo Marques-Tavares, Clayton Ristow
We present the supernova constraints on an axion-photon-dark photon coupling, which can be the leading coupling to dark sector models and can also lead to dramatic changes to axion…
Gamma-Ray Flashes from Dark Photons in Neutron Star Mergers
Melissa D. Diamond, Gustavo Marques-Tavares
In this letter we begin the study of visible dark sector signals coming from binary neutron star mergers. We focus on dark photons emitted in the 10 ms - 1 s after the merger, and…
Axion string signatures II: A cosmological plasma collider
Prateek Agrawal, Anson Hook, Junwu Huang +1
We study early and late time signatures of both QCD axion strings and hyperlight axion strings (axiverse strings). We focus on charge deposition onto axion strings from electromagn…
Causal gravitational waves as a probe of free streaming particles and the expansion of the Universe
Anson Hook, Gustavo Marques-Tavares, Davide Racco
The low frequency part of the gravitational wave spectrum generated by local physics, such as a phase transition or parametric resonance, is largely fixed by causality, offering a…
Scalars Gliding Through an Expanding Universe
Anson Hook, Gustavo Marques-Tavares, Yuhsin Tsai
In this article we investigate the effects of single derivative mixing in massive bosonic fields. In the regime of large mixing, we show that this leads to striking changes of the…
Supernova signals of light dark matter
William DeRocco, Peter W. Graham, Daniel Kasen +2
Dark matter direct detection experiments have poor sensitivity to a galactic population of dark matter with mass below the GeV scale. However, such dark matter can be produced copi…
Observable signatures of dark photons from supernovae
William DeRocco, Peter W. Graham, Daniel Kasen +2
A dark photon is a well-motivated new particle which, as a component of an associated dark sector, could explain dark matter. One strong limit on dark photons arises from excessive…
Light axions with large hadronic couplings
Gustavo Marques-Tavares, Mae Teo
We present models in which axions have large couplings to hadrons while remaining naturally light. By assigning charges to Standard Model quarks such that i…
Opening up the QCD axion window
Prateek Agrawal, Gustavo Marques-Tavares, Wei Xue
We present a new mechanism to deplete the energy density of the QCD axion, making decay constants as high as viable for generic initial conditions. I…
Relaxation from particle production
Anson Hook, Gustavo Marques-Tavares
We consider using particle production as a friction force by which to implement a "Relaxion" solution to the electroweak hierarchy problem. Using this approach, we are able to avoi…
A collider observable QCD axion
Savas Dimopoulos, Anson Hook, Junwu Huang +1
We present a model where the QCD axion is at the TeV scale and visible at a collider via its decays. Conformal dynamics and strong CP considerations account for the axion coupling…
Non-Abelian dark matter and dark radiation
Manuel A. Buen-Abad, Gustavo Marques-Tavares, Martin Schmaltz
We propose a new class of dark matter models with unusual phenomenology. What is ordinary about our models is that dark matter particles are WIMPs, they are weakly coupled to the S…