Specialized data-taking and data-processing techniques were introduced by the CMS
experiment in Run 1 of the CERN LHC to enhance the sensitivity of searches for new …

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 Three searches are presented for signatures of physics beyond the standard model
(SM) in ττ final states in proton-proton collisions at the LHC, using a data sample collected …

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 …

Searches for long-lived particles (LLPs) are among the most promising avenues for
discovering physics beyond the Standard Model at the Large Hadron Collider (LHC) …

This report presents a comprehensive collection of searches for new physics performed by
the ATLAS Collaboration during the Run 2 period of data taking at the Large Hadron …

A plausible explanation for the lightness of neutrino masses is that neutrinos are massless at
tree level, with their mass (typically Majorana) being generated radiatively at one or more …

We present a comprehensive review of physics effects generated by leptoquarks (LQs), ie,
hypothetical particles that can turn quarks into leptons and vice versa, of either scalar or …

The standard model (SM) of particle physics is the mathematical description of the
fundamental constituents and interactions of matter. Its last missing particle, the Higgs …

A search for new phenomena in final states with hadronically decaying tau leptons, b-jets,
and missing transverse momentum is presented. The analyzed dataset comprises pp …