Search Publications
Riding the dark matter wave: Novel limits on general dark photons from LISA Pathfinder
Jaeckel, Joerg; Frerick, Jonas; Kahlhoefer, Felix +1 more
We note the possibility to perform a parametrically improved search for gauged baryon (B) and baryon minus lepton (
Probing grand unification with quantum sensors
Calmet, Xavier; Sherrill, Nathaniel
We discuss how grand unification can be probed with experiments at low energies using quantum sensors. Specifically, we show that scalar multiplets coupled to the gauge sector of a grand unified theory provide a mechanism for a time-varying unified coupling which has low-energy consequences which can be probed with quantum sensors. We then assume …
Axion dark matter from lepton flavor-violating decays
Panci, Paolo; Redigolo, Diego; Schwetz, Thomas +1 more
We propose simple scenarios where lepton flavor-violating couplings generate the observed dark matter abundance through freeze-in of an axion-like particle with mass in the few keV range. Compared to flavor-diagonal freeze-in, this mechanism enhances dark matter stability, softens stellar cooling constraints and improves the experimental sensitivi…
MeV gamma-ray constraints for light dark matter from semi-annihilation
Guo, Jun; Zhu, Bin; Wu, Lei
Exploring the realm of Dark Matter research, Light DM, which has a mass in the range of 1 MeV to 1 GeV, is a fascinating topic both theoretically and experimentally. We assume that the light dark matter is composed of complex scalars and produced from semi-annihilation, which is close to the scale of the MeV Gamma-ray satellite, allowing us to exp…
Dark disk substructure and superfluid dark matter
Alexander, Stephon; Bramburger, Jason J.; McDonough, Evan
Dark matter substructure has the potential to discriminate between broad classes of dark matter models. With this in mind, we construct novel solutions to the equations of motion governing condensate dark matter candidates, namely axion Bose-Einstein condensates and superfluids. These solutions are highly compressed along one axis and thus have a …
Fine-structure constant constraints on late-time dark energy transitions
Martins, C. J. A. P.; Prat Colomer, M.
We use recent astrophysical and local tests of the stability of the fine-structure constant, α, to constrain a particular phenomenological but physically motivated class of models in which the dark energy equation of state can undergo a rapid transition at low redshifts, perhaps associated with the onset of the acceleration phase. We set constrain…
Measuring growth index in a universe with massive neutrinos: A revisit of the general relativity test with the latest observations
Zhang, Jing-Fei; Zhang, Xin; Zhao, Ming-Ming
We make a consistency test for the general relativity (GR) through measuring the growth index γ in a universe with massive (sterile/active) neutrinos. We employ the redshift space distortion measurements to do the analysis. To constrain other cosmological parameters, we also use other cosmological measurements, including the Planck 2015 cosmic mic…
A novel approach to quantifying the sensitivity of current and future cosmological datasets to the neutrino mass ordering through Bayesian hierarchical modeling
Mena, Olga; Gerbino, Martina; Lattanzi, Massimiliano +1 more
We present a novel approach to derive constraints on neutrino masses, as well as on other cosmological parameters, from cosmological data, while taking into account our ignorance of the neutrino mass ordering. We derive constraints from a combination of current as well as future cosmological datasets on the total neutrino mass Mν and on…
A combined view of sterile-neutrino constraints from CMB and neutrino oscillation measurements
Bridle, Sarah; Elvin-Poole, Jack; Evans, Justin +3 more
We perform a comparative analysis of constraints on sterile neutrinos from the Planck experiment and from current and future neutrino oscillation experiments (MINOS, IceCube, SBN). For the first time, we express joint constraints on Neff and meffsterile from the CMB in the Δm2, sin2 2 θ para…
Can decaying particle explain cosmic infrared background excess?
Kohri, Kazunori; Nakayama, Kazunori; Moroi, Takeo
Recently the CIBER experiment measured the diffuse cosmic infrared background (CIB) flux and claimed an excess compared with integrated emission from galaxies. We show that the CIB spectrum can be fitted by the additional photons produced by the decay of a new particle. However, it also contributes too much to the anisotropy of the CIB, which is i…