Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

With the establishment and maturation of the experimental programs searching for new
physics with sizeable couplings at the LHC, there is an increasing interest in the broader …

High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large
number of particles along the beam collision axis, outside of the acceptance of existing LHC …

Abstract The Physics Beyond Colliders initiative is an exploratory study aimed at exploiting
the full scientific potential of the CERN's accelerator complex and scientific infrastructures …

New Particles Beyond the Standard Model have always been thought to be charged under
at least some of the same gauge interactions of ordinary particles. Although this assumption …

We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a
comprehensive survey of standard model (SM) extensions. LLPs are a common prediction of …

A bstract We explore constraints on gauge bosons of a weakly coupled U (1) B− L,\(\mathrm
{U}{(1)} _ {L_ {\mu}-{L} _e},\kern0. 5em\mathrm {U}{(1)} _ {L_e-{L} _ {\tau}}\kern0 …

A bstract Searches for dark photons provide serendipitous discovery potential for other types
of vector particles. We develop a framework for recasting dark photon searches to obtain …

Searches are performed for both promptlike and long-lived dark photons, A′, produced in
proton-proton collisions at a center-of-mass energy of 13 TeV, using A′→ μ+ μ-decays and …

A search for sub-GeV dark matter production mediated by a new vector boson A′, called a
dark photon, is performed by the NA64 experiment in missing energy events from 100 GeV …