503 Result(s)
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Open AccessDrift Time Measurement in the ATLAS Liquid Argon Electromagnetic Calorimeter using Cosmic Muons
The ionization signals in the liquid argon of the ATLAS electromagnetic calorimeter are studied in detail using cosmic muons. In particular, the drift time of the ionization electrons is measured and used to a...
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Open AccessLuminosity determination in pp collisions at \(\sqrt{s} = 7\) TeV using the ATLAS detector at the LHC
Measurements of luminosity obtained using the ATLAS detector during early running of the Large Hadron Collider (LHC) at \(\sqrt{s} = 7\) ...
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Open AccessLimits on the production of the standard model Higgs boson in pp collisions at \(\sqrt{s} = 7\) TeV with the ATLAS detector
A search for the Standard Model Higgs boson at the Large Hadron Collider (LHC) running at a centre-of-mass energy of 7 TeV is reported, based on a total integrated luminosity of up to 40 pb−1 collected by the ATL...
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Open AccessInclusive search for same-sign dilepton signatures in pp collisions at \( \sqrt {s} = 7 \) TeV with the ATLAS detector
An inclusive search is presented for new physics in events with two isolated leptons (e or μ) having the same electric charge. The data are selected from events collected from pp collisions at
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Open AccessSearch for same-sign top-quark production and fourth-generation down-type quarks in pp collisions at \( \sqrt {s} = {7}\;{\text{TeV}} \) with the ATLAS detector
A search is presented for same-sign top-quark production and down-type heavy quarks of charge −1/3 in events with two isolated leptons (e or μ) that have the same electric charge, at least two jets and large miss...
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Open AccessSearch for heavy neutrinos and right-handed W bosons in events with two leptons and jets in pp collisions at \(\sqrt{s} = 7~\mathrm{TeV}\) with the ATLAS detector
This letter reports on a search for hypothetical heavy neutrinos, N, and right-handed gauge bosons, W R, in events with high transverse momentum objects which include two reconstructed leptons and at least one ha...
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Open AccessSearch for second generation scalar leptoquarks in pp collisions at \(\sqrt{s}=7~\mbox{TeV}\) with the ATLAS detector
The results of a search for the production of second generation scalar leptoquarks are presented for final states consisting of either two muons and at least two jets or a muon plus missing transverse momentum...
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Open AccessMeasurement of W ± Z production in proton-proton collisions at \(\sqrt{s}=7~\mbox{TeV}\) with the ATLAS detector
A study of W ± Z production in proton-proton collisions at \(\sqrt{s} = 7~\mbox{TeV}\) is present...
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Open AccessSearch for supersymmetry in events with large missing transverse momentum, jets, and at least one tau lepton in 7 TeV proton-proton collision data with the ATLAS detector
A search for supersymmetry (SUSY) in events with large missing transverse momentum, jets, and at least one hadronically decaying τ lepton, with zero or one additional light lepton (e/μ), has been performed using ...
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Open AccessSearch for high-mass resonances decaying to dilepton final states in pp collisions at \( \sqrt{s}=7 \) TeV with the ATLAS detector
The ATLAS detector at the Large Hadron Collider is used to search for high-mass resonances decaying to an electron-positron pair or a muon-antimuon pair. The search is sensitive to heavy neutral Z′ gauge bosons, ...
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Open AccessSearch for light scalar top-quark pair production in final states with two leptons with the ATLAS detector in \(\sqrt{s}=7\ \mathrm{TeV}\) proton–proton collisions
A search is presented for the pair production of light scalar top quarks in \(\sqrt{s}=7~\mathrm{TeV}\) proton–proton collisions ...
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Open AccessSearch for anomalous production of prompt like-sign lepton pairs at \( \sqrt{s}=7\;\mathrm{TeV} \) with the ATLAS detector
An inclusive search for anomalous production of two prompt, isolated leptons with the same electric charge is presented. The search is performed in a data sample corresponding to 4.7 fb−1 of integrated luminosity...
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Open AccessSearch for doubly charged Higgs bosons in like-sign dilepton final states at \(\sqrt{s} = 7\ \mathrm{TeV}\) with the ATLAS detector
A search for doubly charged Higgs bosons decaying to pairs of electrons and/or muons is presented. The search is performed using a data sample corresponding to an integrated luminosity of 4.7 fb−1 of pp collision...
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Open AccessATLAS search for a heavy gauge boson decaying to a charged lepton and a neutrino in pp collisions at \(\sqrt{s} = 7\ \mathrm{TeV}\)
The ATLAS detector at the LHC is used to search for high-mass states, such as heavy charged gauge bosons (W′), decaying to a charged lepton (electron or muon) and a neutrino. Results are presented based on the an...
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Open AccessSearch for pair production of massive particles decaying into three quarks with the ATLAS detector in \( \sqrt{s}=7\;\mathrm{TeV} \) pp collisions at the LHC
A search is conducted for hadronic three-body decays of a new massive coloured particle in \( \sqrt{s}=7\;\mathrm{TeV} \) pp collisions at the LHC using an in...
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Open AccessSearch for R-parity-violating supersymmetry in events with four or more leptons in \( \sqrt{s}=7\;\mathrm{TeV} \) pp collisions with the ATLAS detector
A search for new phenomena in final states with four or more leptons (electrons or muons) is presented. The analysis is based on 4.7 fb−1 of \( \sqrt{s}=7\;\mathrm{TeV} \) proton-pro...
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Open AccessATLAS search for new phenomena in dijet mass and angular distributions using pp collisions at \( \sqrt{s}=7 \) TeV
Mass and angular distributions of dijets produced in LHC proton-proton collisions at a centre-of-mass energy \( \sqrt{s}=7 \) TeV ...
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Open AccessMeasurement of isolated-photon pair production in pp collisions at \( \sqrt{s}=7\;TeV \) with the ATLAS detector
The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at
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Open AccessSearch for pair-produced massive coloured scalars in four-jet final states with the ATLAS detector in proton–proton collisions at \(\sqrt{s} = 7\ \mbox{TeV}\)
A search for pair-produced massive coloured scalar particles decaying to a four-jet final state is performed by the ATLAS experiment at the LHC in proton–proton collisions at
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Open AccessSearch for resonances decaying into top-quark pairs using fully hadronic decays in pp collisions with ATLAS at \( \sqrt{s}=7 \) TeV
A search for resonances produced in 7 TeV proton-proton collisions and decaying into top-quark pairs is described. In this Letter events where the top-quark decay produces two massive jets with large transvers...
