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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 (tt¯) 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 ct and cG~based on the existingCMS search using 35 fb−1 of proton-proton scattering data collectedat s√=13 TeV.We further investigate posssible distinctions between ALPs and pseudoscalarHiggs bosons as predicted by the Two Higgs doublet model (2HDM), andfind 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 s√=13 TeV collected by the CMS experiment at the LHC is presented. The dataset corresponds to an integrated luminosity of 138fb−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. [...]

Measurements of jet production in proton-proton collisions at the LHC are crucial for precise tests of QCD, improving the understanding of the proton structure and are important tools for searches for physics beyond the standard model. We present the most recent set of jet measurements performed using CMS data, from which measurements of the the strong coupling constant and PDF constraints are derived via QCD fits. [...]

There has been significant progress in the recent past on the usage of sophisticated machine learning techniques for the tagging of hadronically decaying heavy objects with large-radius jets, and the identification of tau leptons decaying to hadrons. These techniques have revolutionized searches for Supersymmetry at the LHC. [...]

We present the nuclear magnetic resonance spectroscopy (NMR) solution structure of the 5′-terminal stem loop 5_SL1 (SL1) of the SARS-CoV-2 genome. SL1 contains two A-form helical elements and two regions with non-canonical structure, namely an apical pyrimidine-rich loop and an asymmetric internal loop with one and two nucleotides at the 5′- and 3′-terminal part of the sequence, respectively. [...]