Browsing by Author "Spearman, William"
Now showing items 21-40 of 106
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Measurement of Inclusive Jet and Dijet Cross-Sections in Proton–proton Collisions at √S = 13 TeV With the ATLAS Detector
Morii, Masahiro; Huth, John; Spearman, William; Franklin, Melissa; Mercurio, K (Springer Science and Business Media LLC, 2018-05)Inclusive jet and dijet cross-sections are measured in proton–proton collisions at a centre- of-mass energy of 13 TeV. The measurement uses a dataset with an integrated luminosity of 3.2 fb−1 recorded in 2015 with the ATLAS ... -
Measurement of the branching ratio Γ(Λ0b→ψ(2S)Λ0)/Γ(Λ0b→J/ψΛ0) with the ATLAS detector
Clark, Brian Lee; Franklin, Melissa; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Tolley, Emma; Yen, Andy; Zambito, Stefano (Elsevier BV, 2015)An observation of the Λ0b→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λ0b→J/ψΛ0 decay has been made with the ATLAS detector in proton--proton collisions at s√=8TeV at the LHC using an integrated ... -
Measurement of the Centrality and Pseudorapidity Dependence of the Integrated Elliptic Flow in Lead–lead Collisions at √sNN=2.76TeV With the ATLAS Detector
Franklin, Melissa; Huth, John; Ippolito, Valerio; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Yen, Andy; Zevi Della Porta, G (Springer Nature, 2014)The integrated elliptic flow of charged particles produced in Pb+Pb collisions at sNN=2.76 TeV has been measured with the ATLAS detector using data collected at the Large Hadron Collider. The anisotropy parameter, v2, was ... -
Measurement of the centrality dependence of the charged-particle pseudorapidity distribution in proton--lead collisions at √snn=5.02 TeV with the ATLAS detector
Franklin, Melissa; Huth, John; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Yen, Andy; Zevi Della Porta, Giovanni (Springer Nature, 2016)The centrality dependence of the mean charged-particle multiplicity as a function of pseudorapidity is measured in approximately 1 μb−1 of proton--lead collisions at a nucleon--nucleon centre-of-mass energy of √snn=5.02 ... -
Measurement of the Charge Asymmetry in Highly Boosted Top-Quark Pair Production in S=8 TeV Pp Collision Data Collected by the ATLAS Experiment
Morii, Masahiro; Huth, John; Franklin, Melissa; Spearman, William (Elsevier BV, 2016-05)In the process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement ... -
Measurement of the Charge Asymmetry in Top-Quark Pair Production in the Lepton-Plus-Jets Final State in pp Collision Data at √s = 8 TeV With the ATLAS Detector
Clark, Brian Lee; Franklin, Melissa; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, D; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Tolley, Emma; Tuna, Alexander; Yen, Andy; Zambito, Stefano (Springer Nature, 2016)This paper reports inclusive and differential measurements of the tt¯tt¯ charge asymmetry ACAC in 20.3 fb−120.3 fb−1 of s√=8 TeVs=8 TeV pppp collisions recorded by the ATLAS experiment at the Large Hadron Collider ... -
Measurement of the correlations between the polar angles of leptons from top quark decays in the helicity basis at s√=7TeV using the ATLAS detector
Clark, Brian Lee; Franklin, Melissa; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Tolley, Emma; Tuna, Alexander; Yen, Andy; Zambito, Stefano (American Physical Society (APS), 2016)A measurement of the correlations between the polar angles of leptons from the decay of pair-produced t and t¯ quarks in the helicity basis is reported, using proton-proton collision data collected by the ATLAS detector ... -
Measurement of the Cross-Section for Electroweak Production of Dijets in Association With a Z Boson in pp Collisions Ats=13 TeVwith the ATLAS Detector
Morii, Masahiro; Huth, John; Franklin, Melissa; Spearman, William (Elsevier BV, 2017-12)The cross-section for the production of two jets in association with a leptonically decaying Z boson (Zjj) is measured in proton–proton collisions at a centre-of-mass energy of 13 TeV, using data recorded with the ATLAS ... -
Measurement of the dependence of transverse energy production at large pseudorapidity on the hard-scattering kinematics of proton-proton collisions at s√=2.76 TeV with ATLAS
Clark, Brian Lee; Franklin, Melissa; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Tolley, Emma; Tuna, Alexander; Yen, Andy; Zambito, Stefano (Elsevier BV, 2016)The relationship between jet production in the central region and the underlying-event activity in a pseudorapidity-separated region is studied in 4.0 pb−1 of s√=2.76 TeV pp collision data recorded with the ATLAS detector ... -
Measurement of the differential cross-section of highly boosted top quarks as a function of their transverse momentum in s√ = 8 TeV proton-proton collisions using the ATLAS detector
Clark, Brian Lee; Franklin, Melissa; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Tolley, Emma; Tuna, Alexander; Yen, Andy; Zambito, Stefano (American Physical Society (APS), 2016)The differential cross-section for pair production of top quarks with high transverse momentum is measured in 20.3 fb−1 of proton-proton collisions at a center-of-mass energy of 8 TeV. The measurement is performed for tt¯ ... -
Measurement of the Differential Cross-Sections of Prompt and Non-Prompt Production of J/ψ and ψ(2S) in Pp Collisions at √s=7 and 8 TeV With the ATLAS Detector
Clark, Brian Lee; Franklin, Melissa; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Tolley, Emma; Zambito, Stefano; Yen, Andy; Tuna, Alexander; Tolley, Emma (Springer Nature, 2016)The production rates of prompt and non-prompt J/ψ and ψ(2S) mesons are measured using 2.1 fb−1 and 11.4 fb−1 of data collected with the ATLAS experiment at the LHC, in proton-proton collisions at s√=7 and 8 TeV respectively. ... -
Measurement of the Drell–Yan Triple-Differential Cross Section in Pp Collisions at √S = 8 TeV
Morii, Masahiro; Franklin, Melissa; Huth, John; Spearman, William (Springer Science and Business Media LLC, 2017-12)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, mll, ... -
Measurement of the Forward-Backward Asymmetry of Electron and Muon Pair-Production in Pp Collisions at √S = 7 TeV With the ATLAS Detector
Guimaraes da Costa, Joao; Butler, B.; Catastini, P.; Conti, G.; Franklin, Melissa; Huth, John; Ippolito, Valerio; Lopez, David; Mercurio, Kevin; Morii, Masahiro; Skottowe, H.P.; Spearman, William; Yen, Andy; Zevi Della Porta, G (Springer Nature, 2015-09)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, m ... -
Measurement of the Higgs Boson Coupling Properties in the H → ZZ∗ → 4l Decay Channel at √S = 13 TeV With the ATLAS Detector
Morii, Masahiro; Huth, John; Franklin, Melissa; Spearman, William (Springer Science and Business Media LLC, 2018-03)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 mass and natural width of the Higgs boson in the H to ZZ to 4l decay channel with the ATLAS detector
Spearman, William R (2014-10-21)This thesis presents a measurement of the mass, natural width, and signal strength, defined as the yield normalized to the Standard Model prediction, of the Higgs boson in the \(H \rightarrow ZZ^{(*)} \rightarrow 4l\) decay ... -
Measurement of the Production and Lepton Charge Asymmetry of W Bosons in Pb+Pb Collisions at √sNN = 2.76 TeV With the ATLAS Detector
Franklin, Melissa; Huth, John; Ippolito, Valerio; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Yen, Andy; Zevi Della Porta, G (Springer Nature, 2015)A measurement of W boson production in lead-lead collisions at √sNN=2.76 TeV is presented. It is based on the analysis of data collected with the ATLAS detector at the LHC in 2011 corresponding to an integrated luminosity ... -
Measurement of the production cross-section of a single top quark in association with a W boson at 8 TeV with the ATLAS experiment
Franklin, Melissa; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Tolley, Emma; Tuna, Alexander; Yen, Andy; Zambito, Stefano (Springer Nature, 2016)The cross-section for the production of a single top quark in association with a W boson in proton--proton collisions at s√=8 TeV is measured. The dataset corresponds to an integrated luminosity of 20.3 fb−1, collected by ... -
A Measurement of the Ratio of the Production Cross Sections for W and Z Bosons in Association With Jets With the ATLAS Detector
Franklin, Melissa; Huth, John; Ippolito, Valerio; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William; Sun, Siyuan; Tolley, Emma; Yen, Andy; Zevi Della Porta, G (Springer Nature, 2014)The ratio of the production cross sections for W and Z bosons in association with jets has been measured in proton-proton collisions at s√ = 7 TeV with the ATLAS experiment at the Large Hadron Collider. The measurement is ... -
Measurement of the Relative Width Difference of the B0-B0 System With the ATLAS Detector
Morii, Masahiro; Franklin, Melissa; Huth, John; Lopez Mateos, D; Mercurio, Kevin; Skottowe, Hugh Philip; Spearman, William (Springer Science and Business Media LLC, 2016-06)Abstract: This paper presents the measurement of the relative width difference ∆Γd/Γd of the B0-B ̄0 system using the data collected by the ATLAS experiment at the LHC in pp √√ collisions at s = 7 TeV and s = 8 TeV and ... -
Measurement of the Soft-Drop Jet Mass in Pp Collisions at S=13 TeV With the ATLAS Detector
Morii, Masahiro; Huth, John; Spearman, William; Skottowe, H; Franklin, Melissa; Catastini, P; Mercurio, K (American Physical Society (APS), 2018-08-28)Calculations of jet substructure observables that are accurate beyond leading-logarithm ac- curacy have recently become available. Such observables are significant not only for probing the collinear regime of QCD that is ...