4 papers
On the importance of radiation-era initial conditions for tensor perturbations
Dražen Glavan, Juraj KlariÄ, Philipp Klose +1
Conservation of super-horizon tensor fluctuations is crucial for connecting inflation to observations. Starting from first principles, recent works have found violations of this co…
Big Bang Nucleosynthesis and the Neutrino-Extended Standard Model Effective Field Theory
Pieter Braat, Jordy de Vries, Jelle Groot +2
We study the impact of light GeV-scale heavy neutral leptons (HNLs) on Big Bang nucleosynthesis (BBN) in the neutrino-extended Standard Model Effective Field Theory (SMEFT). We…
New Particles at the Z-Pole: Tera-Z factories as discovery and precision machines
Marco Drewes, Juraj KlariÄ, Yuan-Zhen Li
Several proposed future lepton colliders are capable of producing trillions of Z-bosons, including FCC-ee, CEPC, LEP3 and LEP-Z. Such Tera-Z factories can discover new elementary p…
ECFA Higgs, electroweak, and top Factory Study
H. Abidi, J. A. Aguilar-Saavedra, S. Airen +373
The ECFA Higgs, electroweak, and top Factory Study ran between 2021 and 2025 as a broad effort across the experimental and theoretical particle physics communities, bringing togeth…