Now showing items 1-20 of 26

• #### Combination of inclusive and differential tt¯ charge asymmetry measurements using ATLAS and CMS data at √s=7 and 8 TeV ﻿

(Peer reviewed; Journal article, 2018-04-09)
This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (tt¯) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC ...
• #### Determination of jet calibration and energy resolution in proton–proton collisions at √s=8TeV using the ATLAS detector ﻿

(Journal article; Peer reviewed, 2020)
The jet energy scale, jet energy resolution, and their systematic uncertainties are measured for jets reconstructed with the ATLAS detector in 2012 using proton–proton data produced at a centre-of-mass energy of 8 TeV with ...
• #### Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-04-09)
A search for the associated production of the Higgs boson with a top quark pair (t¯tH) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1  fb−1 ...
• #### Measurement of colour flow using jet-pull observables in tt¯events with the ATLAS experiment at √s=13 TeV ﻿

(Peer reviewed; Journal article, 2018-10)
Previous studies have shown that weighted angular moments derived from jet constituents encode the colour connections between partons that seed the jets. This paper presents measurements of two such distributions, the ...
• #### Measurement of the Higgs boson mass in the H → ZZ⁎ → 4ℓ and H → γγ channels with √s = 13 TeV pp collisions using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-09-10)
The mass of the Higgs boson is measured in the H → Z Z∗ → 4 and in the H → γγ decay channels with 36.1 fb−1 of proton–proton collision data from the Large Hadron Collider at a centre-of-mass energy of 13 TeV recorded by ...
• #### Measurement of the production cross section of three isolated photons in pp collisions at √s = 8 TeV using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-03-23)
A measurement of the production of three isolated photons in proton–proton collisions at a centre-of-mass energy TeV is reported. The results are based on an integrated luminosity of 20.2 fb−1 collected with the ATLAS ...
• #### Measurements of differential cross sections of top quark pair production in association with jets in pp collisions at √s=13 TeV using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-10)
Measurements of differential cross sections of top quark pair production in association with jets by the ATLAS experiment at the LHC are presented. The measurements are performed as functions of the top quark transverse ...
• #### Measurements of t¯t differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at √s=13  TeV using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-07-25)
Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and tt system kinematic observables using proton-proton collisions at a center-of-mass energy of ...
• #### Prompt and non-prompt J/ψ and ψ(2S) suppression at high transverse momentum in 5.02 TeV Pb+Pb collisions with the ATLAS experiment ﻿

(Peer reviewed; Journal article, 2018-09)
A measurement of&nbsp;J/&psi;J/&psi;&nbsp;and&nbsp;&psi;(2S)&psi;(2S)&nbsp;production is presented. It is based on a data sample from Pb+Pb collisions at&nbsp;sNN&minus;&minus;&minus;&radic;=5.02&nbsp;TeVsNN=5.02&nbsp;Te ...
• #### Search for a heavy Higgs boson decaying into a Z boson and another heavy Higgs boson in the ℓℓbb final state in pp collisions at √s=13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-08-10)
A search for a heavy neutral Higgs boson, A, decaying into a Z boson and another heavy Higgs boson, H, is performed using a data sample corresponding to an integrated luminosity of 36.1 fb−1 from proton– proton collisions ...
• #### Search for flavor-changing neutral currents in top quark decays t→Hc and t→Hu in multilepton final states in proton-proton collisions at √s=13  TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-08-06)
Flavor-changing neutral currents are not present in the Standard Model at tree level and are suppressed in loop processes by the unitarity of the Cabibbo-Kobayashi-Maskawa matrix; the corresponding rates for top quark decay ...
• #### Search for flavour-changing neutral current top-quark decays t → qZ in proton-proton collisions at √s=13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-07-31)
A search for flavour-changing neutral-current processes in top-quark decays is presented. Data collected with the ATLAS detector from proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of ...
• #### Search for heavy charged long-lived particles in the ATLAS detector in 36.1  fb−1 of proton-proton collision data at √s=13  TeV ﻿

(Peer reviewed; Journal article, 2019)
A search for heavy charged long-lived particles is performed using a data sample of 36.1  fb−1 of proton-proton collisions at √s=13  TeV collected by the ATLAS experiment at the Large Hadron Collider. The search is based ...
• #### Search for heavy resonances decaying to a photon and a hadronically decaying Z/W/H boson in pp collisions at √s=13  TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-08-28)
Many extensions of the Standard Model predict new resonances decaying to a Z, W, or Higgs boson and a photon. This paper presents a search for such resonances produced in pp collisions at ffiffi s p ¼ 13 TeV using a data ...
• #### Search for high-mass resonances decaying to τν in pp collisions at √s=13  TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-04-20)
A search for high-mass resonances decaying to τν using proton-proton collisions at √s=13  TeV produced by the Large Hadron Collider is presented. Only τ-lepton decays with hadrons in the final state are considered. The ...
• #### Search for low-mass dijet resonances using trigger-level jets with the ATLAS detector in pp collisions at √s=13  TeV ﻿

(Peer reviewed; Journal article, 2018-08)
Searches for dijet resonances with sub-TeV masses using the ATLAS detector at the Large Hadron Collider can be statistically limited by the bandwidth available to inclusive single-jet triggers, whose data-collection rates ...
• #### Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in √s=13 TeV pp collisions with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-08)
Supersymmetry (SUSY) [1, 2, 3, 4, 5, 6] is an extension to the Standard Model (SM) that introduces partner particles (called sparticles), which differ by half a unit of spin from their SM counterparts. For models with ...
• #### Search for pair production of Higgs bosons in the bb¯¯bb¯¯ final state using proton-proton collisions at √s=13 TeV with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2019-01-03)
A search for Higgs boson pair production in the bb¯¯bb¯¯ final state is carried out with up to 36.1 fb^−1 of LHC proton-proton collision data collected at √s=13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark ...
• #### Search for pair production of Higgsinos in final states with at least three b-tagged jets in √s=13  TeV pp collisions using the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-11)
A search for pair production of the supersymmetric partners of the Higgs boson (higgsinos&nbsp;&tilde;H) in gauge-mediated scenarios is reported. Each higgsino is assumed to decay to a Higgs boson and a gravitino. Two ...
• #### Search for pair production of up-type vector-like quarks and for four-top-quark events in final states with multiple b-jets with the ATLAS detector ﻿

(Peer reviewed; Journal article, 2018-07-12)
A search for pair production of up-type vector-like quarks (T ) with a significant branching ratio into a top quark and either a Standard Model Higgs boson or a Z boson is presented. The same analysis is also used to search ...