260 citations · 1.8k across the 42 of their papers we have counts for
42 papers
Natural Phantom Crossing from Axion-WIMP Interactions
Cédric Delaunay, Seung J. Lee, Yuan Yin +1
We construct a technically natural model in which thermal dark matter (DM) interacts with axion dark energy (DE) and produces an apparent late-time crossing of the phantom divide.…
Natural Phantom Dark Energy from a --Axion
Cédric Delaunay, Admir Greljo
We present a technically natural microscopic realization of apparent phantom dark energy based on an axion coupled to copies of two-flavor dark QCD related by a …
Natural Ultralight Dark Matter: The Quadratic Twin
Cédric Delaunay, Michael Geller, Zamir Heller-Algazi +2
Scalar ultralight dark matter (ULDM) is uniquely accessible to tabletop experiments such as clocks and interferometers, and its search has been the focus of a vast experimental eff…
Rekindling s-Wave Dark Matter Annihilation Below 10GeV with Breit-Wigner Effects
Geneviève Bélanger, Sreemanti Chakraborti, Cédric Delaunay +1
Velocity-independent (s-wave) annihilation of thermal Dark Matter is ruled out by CMB data for masses below 10GeV, effectively ruling out the possibility of indirectly detecting it…
Probing New Forces with Nuclear Clocks
Cédric Delaunay, Seung J. Lee, Roee Ozeri +3
Clocks based on nuclear isomer transitions promise exceptional stability and precision. The low transition energy of the thorium-229 isomer makes it an ideal candidate, as it has b…
Light scalar beyond the Higgs mixing limit
Cédric Delaunay, Teppei Kitahara, Yotam Soreq +1
We explore the possibility that the interactions of a light scalar singlet, which mixes with the Standard Model~(SM) Higgs, also receive other UV contributions of comparable size.…