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 …

Compelling experimental evidence suggests the existence of new physics beyond the well-
established and tested standard model of particle physics. Various current and upcoming …

In July 2012, the ATLAS and CMS collaborations at the CERN Large Hadron Collider
announced the observation of a Higgs boson at a mass of around 125 gigaelectronvolts …

Many extensions of the Standard Model predict the production of dark matter particles at the
LHC. Sufficiently light dark matter particles may be produced in decays of the Higgs boson …

A bstract A direct search for Higgs bosons produced via vector-boson fusion and
subsequently decaying into invisible particles is reported. The analysis uses 139 fb− 1 of pp …

A simultaneous analysis of the B+→ K+ ℓ+ ℓ-and B 0→ K* 0 ℓ+ ℓ-decays is performed to test
muon-electron universality in two ranges of the square of the dilepton invariant mass, q 2 …

A search for invisible decays of the Higgs boson produced via vector boson fusion (VBF) has
been performed with 101 fb $^{-1} $ of proton-proton collisions delivered by the LHC at …

A search for decays to invisible particles of Higgs bosons produced in association with a top-
antitop quark pair or a vector boson, which both decay to a fully hadronic final state, has …

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 …

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 …