Browsing by Subject "Quantum chromodynamics"
Now showing items 1-20 of 33
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Analysis of the Wtb Vertex from the Measurement of Triple-Differential Angular Decay Rates of Single Top Quarks Produced in the T-Channel at √s=8 TeV with the ATLAS Detector
(Springer, 2018-09-24)The electroweak production and subsequent decay of single top quarks in the t-channel is determined by the properties of the Wtb vertex, which can be described by the complex parameters of an effective Lagrangian. An ... -
Branching Fraction and Form-Factor Shape Measurements of Exclusive Charmless Semileptonic B Decays, and Determination of |V_{ub}|
(American Physical Society, 2012-11-05)We report the results of a study of the exclusive charmless semileptonic decays, B0→π -+ν, B+ → π0⁺ν, B +→ω +ν, B +→η +ν, and B +→η ′+ν (=e or μ) undertaken with approximately 462×106 BB̄ pairs collected at the Υ(4S) ... -
Determination of the Strong Coupling Constant αₛ from Transverse Energy-Energy Correlations in Multijet Events at √S=8 TeV Using the ATLAS Detector
(Springer, 2018-09-24)Measurements of transverse energy-energy correlations and their associated asymmetries in multi-jet events using the ATLAS detector at the LHC are presented. The data used correspond to √s = 8 TeV proton-proton collisions ... -
Evidence for the Higgs-Boson Yukawa Coupling to Tau Leptons with the ATLAS Detector
(Springer, 2015-04-21)Results of a search for H → ττ decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities ... -
High-E_T Isolated-Photon Plus Jets Production in pp Collisions at √s̅ = 8 TeV with the ATLAS Detector
(Springer New York LLC, 2018-05-15)Detailed measurements of t-channel single top-quark production are presented. They use 20.2 fb⁻¹ of data collected by the ATLAS experiment in proton–proton collisions at a centre-of-mass energy of 8 TeV at the LHC. Total, ... -
Identification of Boosted, Hadronically Decaying W Bosons and Comparisons with ATLAS Data Taken at √s̅ = 8 TeV
(Springer New York LLC, 2016-03-17)This paper reports a detailed study of techniques for identifying boosted, hadronically decaying W bosons using 20.3 fb⁻¹ of proton–proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy ... -
Luminosity Measurements for the R Scan Experiment at BESIII
(Chinese Physical Soc, 2017-06)By analyzing the large-angle Bhabha scattering events e⁺e⁻ → (γ)e⁺e⁻ and diphoton events e⁺e⁻ → (γ)γγ for the data sets collected at center-of-mass (c.m.) energies between 2.2324 and 4.5900 GeV (131 energy points in total) ... -
Measurement of Charged-Particle Event Shape Variables in Inclusive √(s̅) = 7 TeV Proton-Proton Interactions with the ATLAS Detector
(American Physical Society, 2013-08-06)The measurement of charged-particle event shape variables is presented in inclusive inelastic pp collisions at a center-of-mass energy of 7 TeV using the ATLAS detector at the LHC. The observables studied are the transverse ... -
Measurement of Charged-Particle Spectra in Pb + Pb Collisions at √s̅{n̅n̅} = 2.76 TeV with the ATLAS Detector at the LHC
(Springer, 2015-09-09)Charged-particle spectra obtained in Pb+Pb interactions at √s̅{̅N̅N̅}̅ = 2.76 TeV and pp interactions at √s̅{̅N̅N̅}̅ = 2.76 TeV with the ATLAS detector at the LHC are presented, using data with integrated luminosities of ... -
Measurement of D^{*±}, D^± and {D_s ^±} Meson Production Cross Sections in pp Collisions at √s̅ = 7 TeV with the ATLAS Detector
(Elsevier, 2016-04-25)The production of D*^±, D^± and {D_s ^±} charmed mesons has been measured with the ATLAS detector in pp collisions at √s̅ = 7 TeV at the LHC, using data corresponding to an integrated luminosity of 280 nb⁻¹. The charmed ... -
Measurement of Four-Jet Differential Cross Sections in √s̅ = 8 TeV Proton-Proton Collisions Using the ATLAS Detector
(Springer, 2015-12-16)Differential cross sections for the production of at least four jets have been measured in proton-proton collisions at √s̅ = 8 TeV at the Large Hadron Collider using the ATLAS detector. Events are selected if the four ... -
Measurement of Jet Activity Produced in Top-Quark Events with an Electron, a Muon and Two B-Tagged Jets in the Final State in pp Collisions at √s̅ = 13 TeV with the ATLAS Detector
(Elsevier B.V., 2018-05-15)The dynamics of isolated-photon plus one-, two- and three-jet production in pp collisions at a centre-of-mass energy of 8 TeV are studied with the ATLAS detector at the LHC using a data set with an integrated luminosity ... -
Measurement of Jet Charge in Dijet Events from √s̅ = 8 TeV pp Collisions with the ATLAS Detector
(American Physical Society, 2016)The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of momentum-weighted sums, called ... -
Measurement of the Cross Section for Isolated-Photon Plus Jet Production in pp Collisions at √s=13 TeV Using the ATLAS Detector
(Elsevier Science B.V., 2018-11-05)The dynamics of isolated-photon production in association with a jet in proton-proton collisions at a centre-of-mass energy of 13 TeV are studied with the ATLAS detector at the LHC using a dataset with an integrated ... -
Measurement of the Drell-Yan Triple-Differential Cross Section in pp Collisions at √s=8 TeV
(Springer, 2018-09-27)This paper presents a measurement of the triple-differential cross section for the Drell-Yan process Z/γ* → ℓ⁺ℓ⁻ where ℓ is an electron or a muon. The measurement is performed for invariant masses of the lepton pairs, ... -
Measurement of the D⁰ → π⁻e⁺ν_e Differential Decay Branching Fraction as a Function of q² and Study of Form Factor Parametrizations
(Amer Physical Soc, 2015-03-31)Based on a sample of 500 million e⁺e⁻ → cc̅ events recorded by the BABAR detector at c. m. energies of close to 10.6 GeV, we report on a study of the decay D⁰ → π⁻e⁺ν(e⁻). We measure the ratio of branching fractions, R(D) ... -
Measurement of the Higgs Boson Coupling Properties in the H → ZZ* → 4ℓ Decay Channel at √s=13 TeV with the ATLAS Detector
(Springer, 2018-11-05)The coupling properties of the Higgs boson are studied in the four-lepton (e, μ) decay channel using 36.1 fb⁻¹ of pp collision data from the LHC at a centre-of-mass energy of 13 TeV collected by the ATLAS detector. Cross ... -
Measurement of the Production Cross Section of Jets in Association with a Z Boson in pp Collisions at √s=7 TeV with the ATLAS Detector
(Springer, 2013-07-05)Measurements of the production of jets of particles in association with a Z boson in pp collisions at √s=7 TeV are presented, using data corresponding to an integrated luminosity of 4.6 fb⁻¹ collected by the ATLAS experiment ... -
Measurement of the Production Cross Section of Three Isolated Photons in pp Collisions at √s =8 TeV using the ATLAS Detector
A measurement of the production of three isolated photons in proton–proton collisions at a centre-of-mass energy √s =8 TeV is reported. The results are based on an integrated luminosity of 20.2 fb⁻¹ collected with the ATLAS ... -
Measurement of the Ratio of Cross Sections for Inclusive Isolated-Photon Production in pp Collisions at √s = 13 and 8 TeV with the ATLAS Detector
The ratio of the cross sections for inclusive isolated-photon production in pp collisions at centre-of-mass energies of 13 and 8 TeV is measured using the ATLAS detector at the LHC. The integrated luminosities of the 13 ...