Preprints

Measurements of the differential production cross-sections of prompt and non-prompt $J/\psi $ and $\psi (2{\textrm{S}})$ mesons with transverse momenta between 8 and 360 GeV and rapidity in the range $|y|<2$ are reported. Furthermore, measurements of the non-prompt fractions of $J/\psi $ and $\psi (2{\textrm{S}})$, and the prompt and non-prompt $\psi (2{\textrm{S}})$-to-$J/\psi $ production ratios, are presented. [...]

Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semileptonic decays of heavy quarks produced in 5.02 TeV Pb+Pb and pp collisions at the LHC. [...]

ATLAS measured the centrality dependence of the dijet yield using 165 nb-1 of p+Pb data collected at sNN=8.16 TeV in 2016. The event centrality, which reflects the p+Pb impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. [...]

Measurements of longitudinal flow decorrelations in 13 TeV $pp$ and 5.44 TeV Xe+Xe collisions with the ATLAS detector are presented. The measurements are performed using the two-particle correlation method, combining charged-particle tracks within $|\eta| < 2.5$ with either calorimeter energy clusters or towers within $4.0<|\eta|<4.9$. [...]

Measurements of integrated and differential cross-sections for electroweak W$^{±}$Z production in association with two jets (W$^{±}$Zjj) in proton-proton collisions are presented. The data collected by the ATLAS detector at the Large Hadron Collider from 2015 to 2018 at a centre-of-mass energy of $ \sqrt{s} $ = 13 TeV are used, corresponding to an integrated luminosity of 140 fb$^{−1}$ [...]

Inelastic beam-gas collisions at the Large Hadron Collider(LHC), within a few hundred metres of the ATLAS experiment, areknown to give the dominant contribution to beam backgrounds. Theseare monitored by ATLAS with a dedicated Beam Conditions Monitor(BCM) and with the rate of fake jets in the calorimeters. [...]

The inclusive cross-section for the production of a single top quark in association with a $W$ boson is measured using 140 fb$^{-1}$ of proton$-$proton collision data collected with the ATLAS detector at $\sqrt{s} = 13$ TeV. Events containing two charged leptons and at least one jet identified as originating from a $b$-quark are selected. [...]

Differential measurements of Higgs boson production in the $\tau$-lepton-pair decay channel are presented in the gluon fusion, vector-boson fusion (VBF), $VH$ and $t\bar{t}H$ associated production modes, with particular focus on the VBF production mode. The data used to perform the measurements correspond to 140 fb$^{-1}$ of proton-proton collisions collected by the ATLAS experiment at the LHC. [...]

A search for flavor-changing neutral current interactions of the top quark (t) and the Higgs boson (H) is presented. The search is based on proton-proton collision data collected in 2016-2018 at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, and corresponding to an integrated luminosity of 138 fb$^{-1}$. [...]

A search is presented for the resonant production of a pair of standard model-like Higgs bosons using data from proton-proton collisions at a centre-of-mass energy of 13 TeV, collected by the CMS experiment at the CERN LHC in 2016-2018, corresponding to an integrated luminosity of 138 fb$^{-1}$. The final state consists of two b quark-antiquark pairs. [...]