[PDF] Top 20 QCD Physics with the CMS Experiment

... ment may allow to test various models of parton showers or analytic pQCD resummation methods. According to the QCD prediction the production of two partons has a back-to-back topology in az- imuthal plane. Hence, ... See full document

... The search for new phenomena is of course today the main focus of the CMS experiment. While the studies of 7- and 8-TeV collisions have revealed no significant departures from SM predictions, the range of ... See full document

... the physics objects (electrons, muons, taus, photons, energetic jets, missing transverse energy) recognized by the trigger system and fulfilling the criteria for data acquisition is usually accompanied by several ... See full document

... particle physics, ...the CMS Collaboration [3] based on the Run II dataset at √ s = 13 TeV, with results interpreted in the context of Simplified Models (SMS) [4]-[8], while the full suite of available ... See full document

... [2]. CMS has studied quarkonium production and polarization with a data sample of about ...The CMS measurements presented in this report contribute significantly to the understanding of quarkonia ... See full document

... mass. CMS used improved versions of the matrix weighting technique [13] and the fully kinematic method ...by CMS with the dilepton, lepton+jets and all-hadronic channels ...latest CMS combination of ... See full document

... decay products. In the SM, top quarks from pair production have only a small net polarization arising from electroweak corrections to the QCD-dominated production process, but the pairs have significant spin ... See full document

... strength, while the normalization of the predicted background distributions (Z → ττ, W + jets, QCD multijet and others) corresponds to the result of the global fit. The mass distributions for a constant range of ... See full document

... usage. CMS has a new open data initiative that will make more data available from different decay processes and energies ...QuarkNet CMS and ATLAS Data Workshops will be helpful: these are now being adapted ... See full document

... Precise measurements of cross sections and polarizations for five quarkonium states (J/ψ, ψ(2S), Y(nS)) were provided by the LHC experiments already during Run I [7–16]. Measurements at 13 TeV offer an interesting ... See full document

... measurements of the spectral functions, specially in the higher kinematically-allowed energy bins. Both higher statistics and a good control of experimental systematics are needed, which could be possible at the ... See full document

... A wide range of measurements sensitive to DPS contributions has been also carried out within the CMS physics program for different physics channels. The investigated channels are characterized by a ... See full document

... the H to b b ¯ decay is considered nearly impossible due to overwhelming dijet production expected from quantum-chromodynamic (QCD) interactions. The same holds true for the next most copious production mode, ... See full document

... The Standard Model (SM) of elementary particles and their fundamental interactions has been verified with high accuracy by several experiments, showing an excellent agreement between theoretical expectations and experi- ... See full document

... for physics beyond the standard model. New physics processes may also appear as non-resonant deviations from the predicted diphoton spectrum in events with large missing E T ... See full document

... top-quark physics obtained at the CMS experiment are reported based on the data recorded at centre-of-mass energy up to 13 ...perturbative QCD calculations, provide constraints of fundamental ... See full document

... soft QCD processes which form an irreducible background to hard scattering events via the presence of multiple-partonic interactions ...soft QCD processes require phenomenological models that need to be ... See full document

... Figure 4. (left) Pruned jet mass distribution for simulated jets from W and Z bosons compared to quark/gluon induced jets from QCD simulation and data. (right) Observed and expected upper cross section limit as a ... See full document

... A direct search for a standard-model-like Higgs boson produced in association with a Z boson and decaying to invisible particles is reported [16]. A non-zero partial decay width to invisible particles could provide ... See full document

... The Higgs boson mass was measured with the 2016 data recorded by the CMS experiment, using its decay to four leptons via production of a Z boson pair [7]. The reconstructed in- variant mass of the four ... See full document