Search results for: M. Hirose

Items from 1 to 20 out of 688 results

article

Measurements of electroweak $$Wjj $$ W j j production and constraints on anomalous gauge couplings with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 7 > 1-74

Measurements of the electroweak production of a W boson in association with two jets at high dijet invariant mass are performed using $$\sqrt{s} =$$ s = 7 and 8 $$\text {TeV}$$ TeV proton–proton collision data produced by the Large Hadron Collider, corresponding respectively to 4.7 and 20.2 fb $$^{-1}$$ - 1 of integrated luminosity collected by the ATLAS detector...

article

Jet reconstruction and performance using particle flow with the ATLAS Detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 7 > 1-47

This paper describes the implementation and performance of a particle flow algorithm applied to 20.2 fb $$^{-1}$$ - 1 of ATLAS data from 8 TeV proton–proton collisions in Run 1 of the LHC. The algorithm removes calorimeter energy deposits due to charged hadrons from consideration during jet reconstruction, instead using measurements of their momenta from the inner tracker. This improves...

article

Measurement of multi-particle azimuthal correlations in pp, p + Pb and low-multiplicity Pb + Pb collisions with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 6 > 1-40

Multi-particle cumulants and corresponding Fourier harmonics are measured for azimuthal angle distributions of charged particles in $$pp$$ p p collisions at $$\sqrt{s}$$ s = 5.02 and 13 TeV and in $$p$$ p + Pb collisions at $$\sqrt{s_{_\text {NN}}}$$ s NN = 5.02 TeV, and compared to the results obtained for low-multiplicity $$\mathrm{Pb}~+~\mathrm{Pb}$$...

article

Search for dark matter at $$\sqrt{s}=13~\mathrm{TeV}$$ s = 13 TeV in final states containing an energetic photon and large missing transverse momentum with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 6 > 1-30

Results of a search for physics beyond the Standard Model in events containing an energetic photon and large missing transverse momentum with the ATLAS detector at the Large Hadron Collider are reported. As the number of events observed in data, corresponding to an integrated luminosity of 36.1 fb $$^{-1}$$ - 1 of proton–proton collisions at a centre-of-mass energy of $$13~\mathrm{TeV}$$...

article

Measurement of jet fragmentation in Pb+Pb and pp collisions at $$\sqrt{{s_\mathrm{NN}}} = 2.76$$ s NN = 2.76 TeV with the ATLAS detector at the LHC

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 6 > 1-29

The distributions of transverse momentum and longitudinal momentum fraction of charged particles in jets are measured in Pb+Pb and pp collisions with the ATLAS detector at the LHC. The distributions are measured as a function of jet transverse momentum and rapidity. The analysis utilises an integrated luminosity of 0.14 nb $$^{-1}$$ - 1 of Pb+Pb data and 4.0 pb $$^{-1}$$ - 1 ...

article

Precision measurement and interpretation of inclusive $$W^+$$ W + , $$W^-$$ W - and $$Z/\gamma ^*$$ Z / γ ∗ production cross sections with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 6 > 1-62

High-precision measurements by the ATLAS Collaboration are presented of inclusive $$W^+ \rightarrow \ell ^+\nu $$ W + → ℓ + ν , $$W^- \rightarrow \ell ^-\bar{\nu }$$ W - → ℓ - ν ¯ and $$Z/\gamma ^* \rightarrow \ell \ell $$ Z / γ ∗ → ℓ ℓ ( $$\ell =e,\mu $$ ℓ = e , μ ) Drell–Yan production cross sections at the LHC. The data were collected in...

article

Measurements of the production cross section of a $$Z$$ Z boson in association with jets in pp collisions at $$\sqrt{s} = 13$$ s = 13 TeV with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 6 > 1-31

Measurements of the production cross section of a $$Z$$ Z boson in association with jets in proton–proton collisions at $$\sqrt{s} = 13$$ s = 13 TeV are presented, using data corresponding to an integrated luminosity of 3.16 fb $$^{-1}$$ - 1 collected by the ATLAS experiment at the CERN Large Hadron Collider in 2015. Inclusive and differential cross sections are...

article

Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 5 > 1-35

This paper presents the method and performance of primary vertex reconstruction in proton–proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during 2012 at a centre-of-mass energy of $$\sqrt{s} = 8$$ s = 8 TeV. The performance has been measured as a function of the number of interactions per bunch crossing over a wide...

article

Performance of the ATLAS trigger system in 2015

Atlas Collaboration, M. Aaboud, G. Aad, B. Abbott, more

The European Physical Journal C > 2017 > 77 > 5 > 1-53

During 2015 the ATLAS experiment recorded $$3.8\,{\mathrm{fb}}^{-1}$$ 3.8 fb - 1 of proton–proton collision data at a centre-of-mass energy of $$13\,{\mathrm{TeV}}$$ 13 TeV . The ATLAS trigger system is a crucial component of the experiment, responsible for selecting events of interest at a recording rate of approximately 1 kHz from up to 40 MHz of collisions. This paper...

article

Measurements of top-quark pair differential cross-sections in the $$e\mu $$ e μ channel in pp collisions at $$\sqrt{s} = 13$$ s = 13 TeV using the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 5 > 1-30

This article presents measurements of $$t\bar{t}$$ t t ¯ differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb $$^{-1}$$ - 1 of proton–proton data at a centre-of-mass energy of $$\sqrt{s} = 13$$ s = 13 TeV recorded by the ATLAS experiment at the LHC in 2015. Differential cross-sections are measured as a function...

article

High-ET isolated-photon plus jets production in pp collisions at s=8 TeV with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

Nuclear Physics, Section B > 2017 > 918 > Complete > 257-316

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 of 20.2 fb^-¹. Measurements of isolated-photon plus jets cross sections are presented as functions of the photon and jet transverse momenta. The cross sections as functions of the azimuthal...

article

Measurement of the W boson polarisation in $$t\bar{t}$$ t t ¯ events from pp collisions at $$\sqrt{s}$$ s = 8 TeV in the lepton + jets channel with ATLAS

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 4 > 1-28

This paper presents a measurement of the polarisation of W bosons from $$t\bar{t}$$ t t ¯ decays, reconstructed in events with one high- $$p_{\text{ T }}$$ p T lepton and at least four jets. Data from pp collisions at the LHC were collected at $$\sqrt{s}$$ s = 8 TeV and correspond to an integrated luminosity of 20.2 fb $$^{-1}$$ - 1 . The angle...

article

Probing the W tb vertex structure in t-channel single-top-quark production and decay in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2017 > 2017 > 4 > 1-50

Abstract To probe the W tb vertex structure, top-quark and W -boson polarisation observables are measured from t-channel single-top-quark events produced in proton-proton collisions at a centre-of-mass energy of 8 TeV. The dataset corresponds to an integrated luminosity of 20.2 fb⁻¹, recorded with the ATLAS detector at the LHC. Selected events contain one isolated electron or muon, large missing...

article

Measurement of the inclusive cross-sections of single top-quark and top-antiquark t-channel production in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2017 > 2017 > 4 > 1-41

Abstract A measurement of the t-channel single-top-quark and single-top-antiquark production cross-sections in the lepton+jets channel is presented, using 3.2 fb⁻¹ of proton-proton collision data at a centre-of-mass energy of 13 TeV, recorded with the ATLAS detector at the LHC in 2015. Events are selected by requiring one charged lepton (electron or muon), missing transverse momentum, and two jets...

article

Performance of algorithms that reconstruct missing transverse momentum in $$\sqrt{s}$$ s = 8 TeV proton–proton collisions in the ATLAS detector

G. Aad, B. Abbott, J. Abdallah, O. Abdinov, more

The European Physical Journal C > 2017 > 77 > 4 > 1-46

The reconstruction and calibration algorithms used to calculate missing transverse momentum ( $$E_{\text {T}}^{\text {miss}}$$ E T miss ) with the ATLAS detector exploit energy deposits in the calorimeter and tracks reconstructed in the inner detector as well as the muon spectrometer. Various strategies are used to suppress effects arising from additional proton–proton interactions, called...

article

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 $$\sqrt{s}=13$$ s = 13 TeV with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 4 > 1-38

Measurements of jet activity in top-quark pair events produced in proton–proton collisions are presented, using 3.2 fb $$^{-1}$$ - 1 of pp collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Events are chosen by requiring an opposite-charge $$e\mu $$ e μ pair and two b-tagged jets in the final state. The normalised...

article

Measurement of charged-particle distributions sensitive to the underlying event in s = 13 $$ \sqrt{s}=13 $$ TeV proton-proton collisions with the ATLAS detector at the LHC

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2017 > 2017 > 3 > 1-42

Abstract We present charged-particle distributions sensitive to the underlying event, measured by the ATLAS detector in proton-proton collisions at a centre-of-mass energy of 13 TeV, in low-luminosity Large Hadron Collider fills corresponding to an integrated luminosity of 1.6 nb⁻¹. The distributions were constructed using charged particles with absolute pseudorapidity less than 2.5 and with transverse...

article

Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 3 > 1-45

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 with electrons in the final state that are based on the 2012 pp collision data produced by the LHC at $$\sqrt{\mathrm {s}}$$ s = 8 $$\text {TeV}$$ TeV . The efficiency...

article

Measurements of top quark spin observables in t t ¯ $$ t\overline{t} $$ events using dilepton final states in s = 8 $$ \sqrt{s}=8 $$ TeV pp collisions with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2017 > 2017 > 3 > 1-50

Abstract Measurements of top quark spin observables in t t ¯ $$ t\overline{t} $$ events are presented based on 20.2 fb⁻¹ of s = 8 $$ \sqrt{s}=8 $$ TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons). There are 15 observables,...

article

Search for new phenomena in events containing a same-flavour opposite-sign dilepton pair, jets, and large missing transverse momentum in $$\varvec{\sqrt{s}=13}$$ s = 13 $$\text {TeV}$$ TeV $$\varvec{pp}$$ p p collisions with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, J. Abdallah, more

The European Physical Journal C > 2017 > 77 > 3 > 1-40

Two searches for new phenomena in final states containing a same-flavour opposite-sign lepton (electron or muon) pair, jets, and large missing transverse momentum are presented. These searches make use of proton–proton collision data, collected during 2015 and 2016 at a centre-of-mass energy $$\sqrt{s}=13$$ s = 13 $$\text {TeV}$$ TeV by the ATLAS detector at the large hadron...

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Search results for: M. Hirose

Measurements of electroweak $$Wjj $$ W j j production and constraints on anomalous gauge couplings with the ATLAS detector

Jet reconstruction and performance using particle flow with the ATLAS Detector

Measurement of multi-particle azimuthal correlations in pp, p + Pb and low-multiplicity Pb + Pb collisions with the ATLAS detector

Search for dark matter at $$\sqrt{s}=13~\mathrm{TeV}$$ s = 13 TeV in final states containing an energetic photon and large missing transverse momentum with the ATLAS detector

Measurement of jet fragmentation in Pb+Pb and pp collisions at $$\sqrt{{s_\mathrm{NN}}} = 2.76$$ s NN = 2.76 TeV with the ATLAS detector at the LHC

Precision measurement and interpretation of inclusive $$W^+$$ W + , $$W^-$$ W - and $$Z/\gamma ^*$$ Z / γ ∗ production cross sections with the ATLAS detector

Measurements of the production cross section of a $$Z$$ Z boson in association with jets in pp collisions at $$\sqrt{s} = 13$$ s = 13 TeV with the ATLAS detector

Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC

Performance of the ATLAS trigger system in 2015

Measurements of top-quark pair differential cross-sections in the $$e\mu $$ e μ channel in pp collisions at $$\sqrt{s} = 13$$ s = 13 TeV using the ATLAS detector

High-ET isolated-photon plus jets production in pp collisions at s=8 TeV with the ATLAS detector

Measurement of the W boson polarisation in $$t\bar{t}$$ t t ¯ events from pp collisions at $$\sqrt{s}$$ s = 8 TeV in the lepton + jets channel with ATLAS

Probing the W tb vertex structure in t-channel single-top-quark production and decay in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector

Measurement of the inclusive cross-sections of single top-quark and top-antiquark t-channel production in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector

Performance of algorithms that reconstruct missing transverse momentum in $$\sqrt{s}$$ s = 8 TeV proton–proton collisions in the ATLAS detector

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 $$\sqrt{s}=13$$ s = 13 TeV with the ATLAS detector

Measurement of charged-particle distributions sensitive to the underlying event in s = 13 $$ \sqrt{s}=13 $$ TeV proton-proton collisions with the ATLAS detector at the LHC

Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data

Measurements of top quark spin observables in t t ¯ $$ t\overline{t} $$ events using dilepton final states in s = 8 $$ \sqrt{s}=8 $$ TeV pp collisions with the ATLAS detector

Search for new phenomena in events containing a same-flavour opposite-sign dilepton pair, jets, and large missing transverse momentum in $$\varvec{\sqrt{s}=13}$$ s = 13 $$\text {TeV}$$ TeV $$\varvec{pp}$$ p p collisions with the ATLAS detector

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