7 papers
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…
InterACTing dark radiation models after ACT
William Cvetko, Melissa Joseph, Gustavo Marques-Tavares
In this work we assess the implications of the Atacama Cosmology Telescope DR6 measurements for two interacting dark radiation scenarios previously shown to mitigate the Hubble ten…
Dark Matter-Dark Radiation Interactions and the Hubble Tension
Manuel A. Buen-Abad, Zackaria Chacko, Ina Flood +3
Models in which a subcomponent of dark matter interacts with dark radiation have been proposed as a solution to the Hubble tension. In this framework, the interacting subcomponent…
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…
United States Muon Collider Community White Paper for the European Strategy for Particle Physics Update
A. Abdelhamid, D. Acosta, P. Affleck +301
This document is being submitted to the 2024-2026 European Strategy for Particle Physics Update (ESPPU) process on behalf of the US Muon Collider community, with its preparation co…
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…