440 Result(s)
within
Y. L. Liu
Physics
Elementary Particles, Quantum Field Theory
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Article
Open AccessMeasurements of electroweak W±Z boson pair production in association with two jets in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector
Measurements of integrated and differential cross-sections for electroweak W±Z production in association with two jets (W±Zjj) in proton-proton collisions are presented. The data collected by the ATLAS detector a...
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Article
Open AccessAmplitude analysis of the \( {\Lambda}_{\textrm{b}}^0\to {\textrm{pK}}^{-}\upgamma \) decay
The resonant structure of the radiative decay Λ b 0 ...
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Article
Open AccessMeasurement of t-channel production of single top quarks and antiquarks in pp collisions at 13 TeV using the full ATLAS Run 2 data sample
The production of single top quarks and top antiquarks via the t-channel exchange of a virtual W boson is measured in proton-proton collisions at a centre-of-mass energy of 13 TeV at the LHC using 140 fb−1 of ATL...
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Open AccessMeasurements of the branching fraction ratio \( \mathcal{B}\left(\phi \to {\mu}^{+}{\mu}^{-}\right)/\mathcal{B}\left(\phi \to {\textrm{e}}^{+}{\textrm{e}}^{-}\right) \) with charm meson decays
Measurements of the branching fraction ratio B ϕ ...
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Article
Open AccessMeasurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at \( \sqrt{s} \) = 13 TeV
The cross-section of associated J/ψ-ψ(2S) production in proton-proton collisions at a centre-of-mass energy of ...
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Article
Open AccessSearch for new particles in final states with a boosted top quark and missing transverse momentum in proton-proton collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector
A search for events with one top quark and missing transverse momentum in the final state is presented. The fully hadronic decay of the top quark is explored by selecting events with a reconstructed boosted to...
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Article
Open AccessMultiplicity dependence of σψ(2S)/σJ/ψ in pp collisions at \( \sqrt{s} \) = 13 TeV
The ratio of production cross-sections of ψ(2S) over J/ψ mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy
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Article
Open AccessA measurement of ∆Γs
Using a dataset corresponding to 9 fb−1 of integrated luminosity collected with the LHCb detector between 2011 and 2018 in proton-proton collisions, the decay-time distributions of the decay modes ...
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Article
Open AccessElectron and photon efficiencies in LHC Run 2 with the ATLAS experiment
Precision measurements of electron reconstruction, identification, and isolation efficiencies and photon identification efficiencies are presented. They use the full Run 2 data sample collected by the ATLAS ex...
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Article
Open AccessSearch for electroweak production of supersymmetric particles in final states with two τ-leptons in \( \sqrt{s} \) = 13 TeV pp collisions with the ATLAS detector
Three searches for the direct production of τ-sleptons or charginos and neutralinos in final states with at least two hadronically decaying τ-leptons are presented. For chargino and neutralino production, decays ...
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Article
Open AccessMeasurement of the total and differential cross-sections of \( t\overline{t}W \) production in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector
Measurements of inclusive and differential production cross-sections of a top-quark-top-antiquark pair in association with a W boson ( ...
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Article
Open AccessATLAS Run 2 searches for electroweak production of supersymmetric particles interpreted within the pMSSM
A summary of the constraints from searches performed by the ATLAS collaboration for the electroweak production of charginos and neutralinos is presented. Results from eight separate ATLAS searches are consider...
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Article
Open AccessTest of CP-invariance of the Higgs boson in vector-boson fusion production and in its decay into four leptons
A search for CP violation in the decay kinematics and vector-boson fusion production of the Higgs boson is performed in the H → ZZ* → 4ℓ (ℓ = e, μ) decay channel. The results are based on proton-proton collision ...
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Article
Open AccessMeasurement of the branching fraction of B0 → J/ψπ0 decays
The ratio of branching fractions between B0 → J/ψπ0 and B+ → J/ψK*+ decays is measured with proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The ...
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Article
Open AccessSearch for \({{B} _{c} ^+} \!\rightarrow {{\pi } ^+} {\mu ^+\mu ^-} \) decays and measurement of the branching fraction ratio \({\mathcal {B}} ({{B} _{c} ^+} \!\rightarrow {\psi {(2S)}} {{\pi } ^+} )/{\mathcal {B}} ({{B} _{c} ^+} \!\rightarrow {{J \hspace{-1.66656pt}/\hspace{-1.111pt}\psi }} {{\pi } ^+} )\)
The first search for nonresonant \({{B} _{c} ^+} \!\rightarrow {{\pi } ^+} {\mu ^+\mu ^-} \) ...
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Article
Open AccessStudy of CP violation in B0 → DK⋆(892)0 decays with D → Kπ(ππ), ππ(ππ), and KK final states
A measurement of CP-violating observables associated with the interference of B0 → D0K⋆(892)0 and B ...
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Article
Open AccessA search for R-parity-violating supersymmetry in final states containing many jets in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector
A search for R-parity-violating supersymmetry in final states with high jet multiplicity is presented. The search uses 140 fb−1 of proton-proton collision data at
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Article
Open AccessObservation of the \( {B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0 \) decay
The first observation of the B c + ...
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Article
Open AccessCombination of searches for heavy spin-1 resonances using 139 fb−1 of proton-proton collision data at \( \sqrt{s} \) = 13 TeV with the ATLAS detector
A combination of searches for new heavy spin-1 resonances decaying into different pairings of W, Z, or Higgs bosons, as well as directly into leptons or quarks, is presented. The data sample used corresponds to 1...
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Article
Open AccessPrompt and nonprompt ψ(2S) production in pPb collisions at \( \sqrt{s_{\textrm{NN}}} \) = 8.16 TeV
The production of ψ(2S) mesons in proton-lead collisions at a centre-of-mass energy per nucleon pair of ...
