Combined measurements of the production and decay rates of the Higgs boson, as well as its couplings to vector bosons and fermions, are presented. The analysis uses the LHC proton–proton collision data set recorded with the CMS detector in 2016 at , corresponding to an integrated luminosity of 35.9 . The combination is based on analyses targeting the five main Higgs boson production mechanisms (gluon fusion, vector boson fusion, and associated production with a or boson, or a top quark-antiquark pair) and the following decay modes: , , , , , and . Searches for invisible Higgs boson decays are also considered. The best-fit ratio of the signal yield to the standard model expectation is measured to be , assuming a Higgs boson mass of . Additional results are given for various assumptions on the scaling behavior of the production and decay modes, including generic parametrizations based on ratios of cross sections and branching fractions or couplings. The results are compatible with the standard model predictions in all parametrizations considered. In addition, constraints are placed on various two Higgs doublet models.

The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a W or Z boson (VH), and are searched for in final states including 0, 1, or 2 charged leptons and two identified bottom quark jets. The results from the measurement of these processes in a data sample recorded by the CMS experiment in 2017, comprising 41.3 fb −1 of proton-proton collisions at √ s = 13 TeV, are described. When combined with previous VH measurements using data collected at √ s = 7, 8, and 13 TeV, an excess of events is observed at m H = 125 GeV with a significance of 4.8 standard deviations, where the expectation for the SM Higgs boson is 4.9. The corresponding measured signal strength is 1.01 ± 0.22. The combination of this result with searches by the CMS experiment for H → bb in other production processes yields an observed (expected) significance of 5.6 (5.5) standard deviations and a signal strength of 1.04 ± 0.20.

Searches for the direct electroweak production of supersymmetric charginos, neutralinos, and sleptons in a variety of signatures with leptons and , , and Higgs bosons are presented. Results are based on a sample of proton-proton collision data collected at center-of-mass energy with the CMS detector in 2012, corresponding to an integrated luminosity of 19.5 . The observed event rates are in agreement with expectations from the standard model. These results probe charginos and neutralinos with masses up to 720 , and sleptons up to 260 , depending on the model details.

A search for new physics is performed in multijet events with large missing transverse momentum produced in proton-proton collisions at √ s = 8 TeV using a data sample corresponding to an integrated luminosity of 19.5 fb −1 collected with the CMS detector at the LHC. The data sample is divided into three jet multiplicity categories (3-5, 6-7, and ≥8 jets), and studied further in bins of two variables: the scalar sum of jet transverse momenta and the missing transverse momentum. The observed numbers of events in various categories are consistent with backgrounds expected from standard model processes. Exclusion limits are presented for several simplified supersymmetric models of squark or gluino pair production. 3 Sample selectionAll these backgrounds are determined using the data, with as little reliance on simulation as possible. The CMS detector and event reconstructionThe CMS detector is a multipurpose apparatus, described in detail in Ref. [5]. The CMS coordinate system is defined with the origin at the centre of the detector and the z axis along the anticlockwise beam direction. The polar angle θ is measured with respect to the z axis, and the azimuthal angle φ (measured in radians) in the plane perpendicular to that axis. Chargedparticle trajectories are measured with a silicon pixel and strip tracker, covering |η| < 2.5, where the pseudorapidity η is defined as η = − ln[tan(θ/2)]. Immersed in the 3.8 T magnetic field provided by a 6 m diameter superconducting solenoid, which also encircles the calorimeters, the tracking system provides transverse momentum (p T ) resolution of approximately 1.5% for charged particles with p T ∼ 100 GeV. A lead-tungstate crystal electromagnetic calorimeter and a brass-and-scintillator hadron calorimeter surround the tracking volume and cover the region |η| < 3. Steel and quartz-fibre hadron forward calorimeters extend the coverage to |η| ≤ 5. Muons are identified in gas ionization detectors embedded in the steel flux return yoke of the magnet. The events used for this search are recorded using a two-level trigger system described in Ref. [5].The recorded events are required to have at least one well-identified interaction vertex with z position within 24 cm from the nominal centre of the detector and transverse distance from the z axis less than 2 cm. The primary vertex is the one with the largest sum of p T -squared of all the associated tracks, and is assumed to correspond to the hard-scattering process. The events are reconstructed using a particle-flow (PF) algorithm [23]. This algorithm reconstructs a list of particles in each event, namely charged and neutral hadrons, photons, muons, and electrons, combining the information from the tracker, the calorimeters, and the muon system. These particles are then clustered into jets using the anti-k T clustering algorithm [24] with a size parameter of 0.5. Contributions from additional pp collisions overlapping with the event of interest (pileup) are mitigated by discarding charged particles not associated with the primary vert...