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Search for a new heavy gauge-boson resonance decaying into a lepton and missing transverse momentum in 36 fb \(^{-1}\) of pp collisions at \(\sqrt{s} = 13\) TeV with the ATLAS experiment

The results of a search for new heavy \(W^\prime \) bosons decaying to an electron or muon and a neutrino using proton–proton collision data at a centre-of-mass energy of \(\sqrt{s}~=~13\) TeV are presented. The dataset was collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider and corresponds to an integrated luminosity of 36.1 \(\text{ fb }^{-1}\). As...

Search for heavy ZZ resonances in the $$\ell ^+\ell ^-\ell ^+\ell ^-$$ and $$\ell ^+\ell ^-\nu \bar{\nu }$$ℓ+ℓ-νν¯ final states using proton–proton collisions at $$\sqrt{s}= 13$$s=13 $$\text {TeV}$$TeV with the ATLAS detector

A search for heavy resonances decaying into a pair of \(Z\) bosons leading to \(\ell ^+\ell ^-\ell ^+\ell ^-\) and \(\ell ^+\ell ^-\nu \bar{\nu }\) final states, where \(\ell \) stands for either an electron or a muon, is presented. The search uses proton–proton collision data at a centre-of-mass energy of 13 \(\text {TeV}\) corresponding to an integrated luminosity of 36.1...

Combination of inclusive and differential \( \mathrm{t}\overline{\mathrm{t}} \) charge asymmetry measurements using ATLAS and CMS data at \( \sqrt{s}=7 \) and 8 TeV

AbstractThis paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair \( \left(\mathrm{t}\overline{\mathrm{t}}\right) \) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. The data correspond to integrated...

A search for pair-produced resonances in four-jet final states at $$\sqrt{s}=13$$$$\text {TeV}$$TeV with the ATLAS detector

A search for massive coloured resonances which are pair-produced and decay into two jets is presented. The analysis uses 36.7 fb\(^{-1}\) of \(\sqrt{s}\) = 13 TeV pp collision data recorded by the ATLAS experiment at the LHC in 2015 and 2016. No significant deviation from the background prediction is observed. Results are interpreted in a SUSY simplified model where the lightest...

Measurement of differential cross-sections of a single top quark produced in association with a W boson at $$\sqrt{s}={13}{\text {TeV}}$$ with ATLAS

The differential cross-section for the production of a W boson in association with a top quark is measured for several particle-level observables. The measurements are performed using \({36.1}\,\text {fb}^{-1}\) of pp collision data collected with the ATLAS detector at the LHC in 2015 and 2016. Differential cross-sections are measured in a fiducial phase space defined by the...

Measurement of quarkonium production in proton–lead and proton–proton collisions at $$5.02~\mathrm {TeV}$$ with the ATLAS detector

The modification of the production of \(J/\psi \), \(\psi (2\mathrm {S})\), and \(\varUpsilon (n\mathrm {S})\) (\(n = 1, 2, 3\)) in p+Pb collisions with respect to their production in pp collisions has been studied. The p+Pb and pp datasets used in this paper correspond to integrated luminosities of \(28~\mathrm {nb}^{-1}\) and \(25~\mathrm {pb}^{-1}\) respectively, collected in...

Measurement of $$\tau $$ polarisation in $$Z/\gamma ^{*}\rightarrow \tau \tau $$Z/γ∗→ decays in proton–proton collisions at $$\sqrt{s}=8$$s=8 TeV with the ATLAS detector

This paper presents a measurement of the polarisation of \(\tau \) leptons produced in \(Z/\gamma ^{*}\rightarrow \tau \tau \) decays which is performed with a dataset of proton—proton collisions at \(\sqrt{s}=8\) TeV, corresponding to an integrated luminosity of 20.2 fb\(^{-1}\) recorded with the ATLAS detector at the LHC in 2012. The \(Z/\gamma ^{*}\rightarrow \tau \tau...

Search for the direct production of charginos and neutralinos in final states with tau leptons in $$\sqrt{s} = 13\,\mathrm{TeV}$$ pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with at least two hadronically decaying tau leptons is presented. The analysis uses a dataset of pp collisions corresponding to an integrated luminosity of 36.1 fb\(^{-1}\), recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. No significant deviation...

Direct top-quark decay width measurement in the $$\mathbf {\varvec{t\bar{t}}}$$ lepton+jets channel at $$\sqrt{s}=8~\text {TeV}$$s=8TeV with the ATLAS experiment

This paper presents a direct measurement of the decay width of the top quark using \(t\bar{t}\) events in the lepton+jets final state. The data sample was collected by the ATLAS detector at the LHC in proton–proton collisions at a centre-of-mass energy of 8 TeV and corresponds to an integrated luminosity of 20.2 fb\(^{-1}\). The decay width of the top quark is measured using a...

Search for new phenomena in high-mass final states with a photon and a jet from $$$$ collisions at $$\sqrt{s}$$s = 13 TeV with the ATLAS detector

A search is performed for new phenomena in events having a photon with high transverse momentum and a jet collected in \(36.7~\text {fb}^{-1} \) of proton–proton collisions at a centre-of-mass energy of \(\sqrt{s}\) = 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. The invariant mass distribution of the leading photon and jet is examined to look for the...

Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using \( \sqrt{s}=8 \) TeV proton-proton collision data

A search for squarks and gluinos in final states containing high-p T jets, missing transverse momentum and no electrons or muons is presented. The data were recorded in 2012 by the ATLAS experiment in \( \sqrt{s}=8 \) TeV proton-proton collisions at the Large Hadron Collider, with a total integrated luminosity of 20.3 fb−1. Results are interpreted in a variety of simplified and...

Search for new particles in events with one lepton and missing transverse momentum in pp collisions at \( \sqrt{s} \) = 8 TeV with the ATLAS detector

This paper presents a search for new particles in events with one lepton (electron or muon) and missing transverse momentum using 20.3 fb−1 of proton-proton collision data at \( \sqrt{s} \) = 8 TeV recorded by the ATLAS experiment at the Large Hadron Collider. No significant excess beyond Standard Model expectations is observed. A W ′ with Sequential Standard Model couplings is...

Measurement of the production cross-section of ψ(2S) → J/ψ(→μ + μ − )π + π − in pp collisions at \( \sqrt{s} \) = 7 TeV at ATLAS

The prompt and non-prompt production cross-sections for ψ(2S) mesons are measured using 2.1 fb−1 of pp collision data at a centre-of-mass energy of 7 TeV recorded by the ATLAS experiment at the LHC. The measurement exploits the ψ(2S) → J/ψ(→ μ + μ − )π + π − decay mode, and probes ψ(2S) mesons with transverse momenta in the range 10 ≤ p T 100 GeV and rapidity |y| 2.0. The results...

Search for dark matter produced in association with bottom or top quarks in \(\sqrt{s}=13\) TeV pp collisions with the ATLAS detector

A search for weakly interacting massive dark-matter particles produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and missing transverse momentum are considered. The analysis uses \(36.1 \; \mathrm {fb}^{-1}\) of proton–proton collision data recorded by the ATLAS experiment at \(\sqrt{s}=13\) TeV in 2015 and 2016. No...