12 papers
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 …
Hierarchies from Higher Flavor Spin
Admir Greljo, Alessandro Valenti
We develop a framework in which Yukawa hierarchies arise from powers of fully anarchic spurions transforming in higher representations of the flavor symmetry group $SU(2)^{n_2}\tim…
When Two Loops Matter: Electroweak Precision in the SMEFT
Lukas Born, Admir Greljo, Anders Eller Thomsen
We identify a novel next-to-leading order renormalization effect in the dimension-six SMEFT with direct phenomenological impact. The Higgs-Yukawa operator that modifies the top-Hig…
Charting the Flavour Structure of Dark Matter
Simone Biondini, Admir Greljo, Xavier Ponce DÃaz +1
What flavour structure of -channel thermal dark matter remains compatible with current flavour physics and direct detection bounds? We broadly chart the space of hypotheses usin…
Minimal Flavor Protection for TeV-scale New Physics
Admir Greljo, Ajdin PalavriÄ, Ben A. Stefanek
We determine how much TeV-scale new physics can deviate from flavor universality, , while respecting stringent bounds on flavor-changing neutral currents. The minimal conti…
Insights on the Cosmic Origin of Matter from Proton Stability
Admir Greljo, Xavier Ponce DÃaz, Anders Eller Thomsen
We investigate the phenomenology of a model in which the proton is rendered absolutely stable by an IR mechanism that remains robust against unknown quantum gravity effects. A line…