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 …

This article is a pedagogical review of searches for long-lived particles at the LHC. It is
primarily aimed at experimentalists and theorists seeking to initiate and/or deepen their …

A bstract The production of a top quark-antiquark pair in association with a W boson
(\(\textrm {t}\overline {\textrm {t}}\textrm {W}\)) is measured in proton-proton collisions at a …

The electron-positron stage of the Future Circular Collider, FCC-ee, is a frontier factory for
Higgs, top, electroweak, and flavour physics. It is designed to operate in a 100 km circular …

This report, as part of the 2021 Snowmass Process, summarizes the current status of collider
physics at the Energy Frontier, the broad and exciting future prospects identified for the …

A bstract The existence of right-handed neutrinos, or heavy neutral leptons (HNLs), is
strongly motivated by the observation of neutrino masses and mixing. The mass of these …

A bstract A search for new physics in final states consisting of at least one photon, multiple
jets, and large missing transverse momentum is presented, using proton-proton collision …

A bstract The production cross section of a top quark pair in association with a photon is
measured in proton-proton collisions in the decay channel with two oppositely charged …

A search for long-lived particles (LLPs) decaying in the CMS muon detectors is presented. A
data sample of proton-proton collisions at $\sqrt {s} $= 13 TeV corresponding to an …

We consider the dipole portal to sterile neutrinos, also called heavy neutral leptons (HNLs).
The dipole interaction with the photon leads to HNL production in meson decays as well as …