Browsing by Author "Morii, Masahiro"
Now showing items 21-40 of 463
-
Determination of the ratio of b-quark fragmentation fractions fs/fd in pp collisions at s√=7 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; Yen, Andy; Zambito, Stefano (American Physical Society (APS), 2015)With an integrated luminosity of 2.47 fb−1 recorded by the ATLAS experiment at the LHC, the exclusive decays B0s→J/ψϕ and B0d→J/ψK∗0 of B mesons produced in pp collisions at s√=7 TeV are used to determine the ratio of ... -
Determination of the strong coupling constant αs from transverse energy-energy correlations in multijet events at s√=8 TeV using the ATLAS detector
Franklin, Melissa; Huth, John; Morii, MasahiroMeasurements 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 ... -
Determination of the Top-Quark Pole Mass Using T T + 1-Jet Events Collected With the ATLAS Experiment in 7 TeV Pp Collisions
Morii, Masahiro; Franklin, Melissa; Clark, B; Huth, John; Spearman, William; Lopez Mateos, D; Ippolito, Victoria; Barreiro Guimarães da Costa, J; Skottowe, H (Springer Science and Business Media LLC, 2015-10)The normalized differential cross section for top-quark pair production in association with at least one jet is studied as a function of the inverse of the invariant mass of the ����⎯⎯+ 1-jet system. This distribution can ... -
Dijet production in s√=7 TeV pp collisions with large rapidity gaps at the ATLAS experiment
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)A 6.8 nb−1 sample of pp collision data collected under low-luminosity conditions at s√=7 TeV by the ATLAS detector at the Large Hadron Collider is used to study diffractive dijet production. Events containing at least two ... -
Direct top-quark decay width measurement in the t t ̄ lepton+jets channel at √s = 8 TeV with the ATLAS experiment
Franklin, Melissa; Huth, John; Morii, Masahiro (Springer Science and Business Media LLC, 2018-02)This paper presents a direct measurement of the decay width of the top quark using tt ̄ events in the lepton+jets final state. The data sample was collected by the ATLAS detector at the LHC in proton–proton collisions at ... -
Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data
Chan, Stephen Kam Wah; Clark, Brian Lee; Franklin, Melissa; Giromini, Paolo; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Morii, Masahiro; Rogan, Christopher S.; Roloff, Jennifer Kathryn; Sun, Siyuan; Tolley, Emma; Tong, Baojia; Tuna, Alexander; Zambito, Stefano (Springer Nature, 2017)This paper describes the algorithms for the reconstruction and identification of electrons in the central region of the ATLAS detector at the Large Hadron Collider (LHC). These algorithms were used for all ATLAS results ... -
Erratum To: Search for New Phenomena in Final States With an Energetic Jet and Large Missing Transverse Momentum in Pp Collisions at √s = 8 TeV With the ATLAS Detector
Franklin, Melissa; Huth, John; Ippolito, Valerio; Lopez Mateos, David; Mercurio, Kevin; Morii, Masahiro; Spearman, William (Springer Nature, 2015) -
Erratum To: Search for Production of WW / WZ Resonances Decaying to a Lepton, Neutrino and Jets in Pp Collisions at √s=8 TeV 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 (Springer Nature, 2015)A search is presented for narrow diboson resonances decaying to WW or WZ in the final state where one W boson decays leptonically (to an electron or a muon plus a neutrino) and the other W/Z boson decays hadronically. The ... -
Evidence for Light-by-Light Scattering in Heavy-Ion Collisions With the ATLAS Detector at the LHC
Morii, Masahiro; Huth, John; Franklin, Melissa; Spearman, William (Springer Science and Business Media LLC, 2017-08-14)Light-by-light scattering (γγ→γγ) is a quantum-mechanical process that is forbidden in the classical theory of electrodynamics. This reaction is accessible at the Large Hadron Collider thanks to the large electromagnetic ... -
Evidence for single top-quark production in the s-channel in proton-proton collisions at s√=8 TeV with the ATLAS detector using the Matrix Element Method
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)This Letter presents evidence for single top-quark production in the s-channel using proton-proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS detector at the CERN Large Hadron Collider. The analysis is ... -
Evidence for single top-quark production in the s-channel in proton–proton collisions at √s = 8 TeV with the ATLAS detector using the Matrix Element Method
Franklin, Melissa; Huth, John; Morii, Masahiro (Elsevier, 2016-05-10) -
Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector
Franklin, Melissa; Huth, John; Morii, Masahiro (American Physical Society (APS), 2018-04-09)A search for the associated production of the Higgs boson with a top quark pair (tt ̄H) is reported. The search is performed in multilepton final states using a dataset corresponding to an integrated luminosity of 36.1 ... -
Evidence for the H→bb¯ decay with the ATLAS detector
Franklin, Melissa; Huth, John; Morii, MasahiroA search for the decay of the Standard Model Higgs boson into a bb¯ pair when produced in association with a W or Z boson is performed with the ATLAS detector. The analysed data, corresponding to an integrated luminosity ... -
High-ET isolated-photon plus jets production in pp collisions at s√= 8 TeV with the ATLAS detector
Franklin, Melissa; Chan, Stephen Kam Wah; Clark, Brian Lee; Giromini, Paolo; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Morii, Masahiro; Rogan, Christopher S.; Roloff, Jennifer Kathryn; Tolley, Emma; Tong, Baojia; Tuna, Alexander; Zambito, Stefano (Elsevier BV, 2017)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 ... -
Identification and Energy Calibration of Hadronically Decaying Tau Leptons With the ATLAS Experiment in pp Collisions at √s=8 TeV
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, 2015)This paper describes the trigger and offline reconstruction, identification and energy calibration algorithms for hadronic decays of tau leptons employed for the data collected from pp collisions in 2012 with the ATLAS ... -
Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector
Franklin, Melissa; Huth, John; Morii, MasahiroThe rejection of forward jets originating from additional proton--proton interactions (pile-up) is crucial for a variety of physics analyses at the LHC, including Standard Model measurements and searches for physics beyond ... -
Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at \sqrt{s} = 8 TeV
Morii, Masahiro (Springer Science and Business Media LLC, 2016-03) -
Identification of boosted, hadronically decaying W bosons and comparisons with ATLAS data taken at s√=8 TeV
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 (Springer Nature, 2016)This paper reports a detailed study of techniques for identifying boosted, hadronically decaying W bosons using 20fb−1 of proton-proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy ... -
Identification of high transverse momentum top quarks in pp collisions at $$ \sqrt{s}=8 $$ TeV with the ATLAS detector
Franklin, Melissa; Huth, John; Morii, Masahiro (Springer Nature, 2016)This paper presents studies of the performance of several jet-substructure techniques, which are used to identify hadronically decaying top quarks with high transverse momentum contained in large-radius jets. The efficiency ...