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A search for flavor violating decays of the Z boson to charged leptons is performed using data from proton-proton collisions at s=13 TeV collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 138 fb-1. Each of the decays Z→eμ, Z→eτ, and Z→μτ is considered. [...]

The traditional quark model$^{1,2}$ accounts for the existence of baryons, such as protons and neutrons, which consist of three quarks, as well as mesons, composed of a quark–antiquark pair. Only recently has substantial evidence started to accumulate for exotic states composed of four or five quarks and antiquarks$^{3}$. [...]

A measurement of event-shape variables is presented, using a data sample produced in a special run with approximately one inelastic proton-proton collision per bunch crossing. The data were collected with the CMS detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 64 μb-1. [...]

A first search for beyond the standard model physics in jet multiplicity patterns of multilepton events is presented, using a data sample corresponding to an integrated luminosity of 138 fb-1 of 13 TeV proton-proton collisions recorded by the CMS detector at the LHC. The search uses observed jet multiplicity distributions in one-, two-, and four-lepton events to explore possible enhancements in jet production rate in three-lepton events with and without bottom quarks. [...]

A search for γH production is performed with data from the CMS experiment at the LHC corresponding to an integrated luminosity of 138 fb-1 at a proton-proton center-of-mass collision energy of 13 TeV. The analysis focuses on the topology of a boosted Higgs boson recoiling against a high-energy photon. [...]

With the upcoming High-Luminosity phase of the LHC, the CMS experiment is upgrading many of its subdetectors, notably the end-cap calorimeters. The High-Granularity Calorimeter (HGCAL) upgrade will completely replace the current electromagnetic and hadronic end-cap calorimeters with a radiation-hard, high granularity, silicon and SiPM-on-Tile sampling calorimeter. [...]