Contributions to a conference proceedings

The latest results for measurements of electroweak (EW) boson pair production of Vγ (V=W or Z) plus two jets (j) in LHC proton-proton collisions at a center-of-mass energy of 13 TeV are presented. The measurements are performed in final states of ℓℓγjj and ννγjj in Z boson decay modes and ℓνγjj for W boson decay with the data recorded by the CMS and ATLAS detectors in 2016-2018 corresponding to integrated luminosities of 137 and 139 fb$^{−1}$. [...]

A set of measurements involving the t$\bar{\text{t}}$ production and the fermion associated t$\bar{\text{t}}$ production is presented. Data were recorded from proton-proton collisions at the CERN's LHC with the CMS detector, at a center-of-mass energy of 13 and 13.6 TeV. [...]

In particle physics, Monte Carlo (MC) event generators are needed to compare theory to the measured data. Many MC samples have to be generated to account for theoretical systematic uncertainties, at a significant computational cost. [...]

We present an analysis of the sensitivityof LHC searches for new spin-0 particlesproduced via gluon-fusion and decaying intotop-antitop-quark ($t\bar{t}$) final statesto generic axion-like particles (ALPs)coupled to top-quarks and gluons.We derive new limits on the effective ALPLagrangian in the linear representationin terms of the Wilsoncoefficients $c_{t}$ and $c_{\tilde{G}}$based on the existingCMS search using $35$ fb$^{-1}$ of proton-proton scattering data collectedat $\sqrt{s} = 13$ TeV. We further investigate posssible distinctions between ALPs and pseudoscalarHiggs bosons as predicted by the Two Higgs doublet model (2HDM), and find that a distinction is possiblewith data anticipated to be collectedduring the high-luminosity phase of the LHCfor a significant range of the effective ALP-gluon coupling..

The search for lepton-flavor violating decays of the Higgs boson to an electron-muon pair using data from proton-proton collisions at $\sqrt{s} = 13$ TeV collected by the CMS experiment at the LHC is presented. The dataset corresponds to an integrated luminosity of $138 fb^{-1}$. [...]

In this note, recent results on searches for heavy neutral leptons (HNLs) with the CMS experiment at 13 TeV are reviewed. Various phenomenological models predict HNLs as a compelling extension to the standard model. [...]

The discovery of a Higgs boson with a mass of about 125 GeV by the ATLAS and CMS experiments at the LHC in 2012 validated the standard model (SM) mechanism in which the particles acquire mass through the spontaneous breaking of the electroweak symmetry. The measurements of the Higgs boson properties are, so far, consistent with the expectations of the standard model. [...]

The CMS experiment is one of the largest international scientific collaborations in history, involving more than 6000 particle physicists, engineers, technicians, students and support staff from 257 institutes in 59 countries, therefore, the CMS collaboration is inherently a diverse and unique scientific environment. In this report we present statistical information related to diversity in CMS with data collected between 2016-2018. [...]

Effective Field Theories (EFTs) offer a systematic way of parametrising small deviations from the Standard Model (SM) originating from new phenomena. In the top quark sector, by using the full potential of the second run of the LHC, the CMS Collaboration is able to perform precision measurements of well-studied top interactions as well as measure rarer top processes. [...]

Recent measurements of the inclusive $\mathrm{t\overline{t}}$ production cross section, $\sigma_\mathrm{t\overline{t}}$, and the ratio of $\mathrm{t\overline{t}}$ to Z boson production, $R_{\mathrm{t\overline{t}}/\mathrm{Z}}$, are presented by the CMS and ATLAS collaborations using data collected from proton-proton collisions at the new LHC operating energy of $\sqrt{s}=13.6$ TeV. These are among the first results of the ongoing LHC Run 3 data-taking period, which began in 2022, and provide a first opportunity to measure changes in key physics observables following the increase in energy. [...]