In this work, we consider the case of a strongly coupled dark/hidden sector, which extends
the Standard Model (SM) by adding an additional non-Abelian gauge group. These …

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 …

Abstract Particles beyond the Standard Model (SM) can generically have lifetimes that are
long compared to SM particles at the weak scale. When produced at experiments such as …

A bstract The problems of neutrino masses, matter-antimatter asymmetry, and dark matter
could be successfully addressed by postulating right-handed neutrinos with Majorana …

This document presents the physics case and ancillary studies for the proposed CODEX-b
long-lived particle (LLP) detector, as well as for a smaller proof-of-concept demonstrator …

A bstract The first collider search for dark matter arising from a strongly coupled hidden
sector is presented and uses a data sample corresponding to 138 fb− 1, collected with the …

We provide five benchmark hidden valley models with perturbative parton showers, which
span a wide range of dark shower phenomenology. We consider production through an s …

A bstract An inclusive search for long-lived exotic particles decaying to a pair of muons is
presented. The search uses data collected by the CMS experiment at the CERN LHC in …

A bstract This paper presents a search for a new Z′ resonance decaying into a pair of dark
quarks which hadronise into dark hadrons before promptly decaying back as Standard …

Kinematic variables play an important role in collider phenomenology, as they expedite
discoveries of new particles by separating signal events from unwanted background events …