A5005738114- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Advanced Data Storage Technologies
- Muon and positron interactions and applications
- thermodynamics and calorimetric analyses
- advanced mathematical theories
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Big Data Technologies and Applications
- Atmospheric Ozone and Climate
- Structural Analysis of Composite Materials
- Islamic Thought and Society Studies
European Organization for Nuclear Research
2016-2025
Northern Illinois University
2020-2024
Atlas Scientific (United States)
2024
Institute for High Energy Physics
2023-2024
Institute of Science and Technology
2023-2024
Oklahoma State University
2024
A. Alikhanyan National Laboratory
2024
Institute of High Energy Physics
2024
The University of Adelaide
2013-2023
University of Edinburgh
2023
The simulation software for the ATLAS Experiment at Large Hadron Collider is being used large-scale production of events on LHC Computing Grid. This requires many components, from generators that simulate particle collisions, through packages simulating response various detectors and triggers. All these components come together under infrastructure. In this paper, infrastructure discussed, including supporting detector description, interfacing event generation, combining GEANT4 individual...
A measurement of the Higgs boson mass is presented based on combined data samples ATLAS and CMS experiments at CERN LHC in H→γγ H→ZZ→4ℓ decay channels. The results are obtained from a simultaneous fit to reconstructed invariant peaks two channels for experiments. measured masses individual found be consistent among themselves. mH=125.09±0.21 (stat)±0.11 (syst) GeV.Received 25 March 2015DOI:https://doi.org/10.1103/PhysRevLett.114.191803This article available under terms Creative Commons...
In response to the 2013 Update of European Strategy for Particle Physics, Future Circular Collider (FCC) study was launched, as an international collaboration hosted by CERN. This covers a highest-luminosity high-energy lepton collider (FCC-ee) and energy-frontier hadron (FCC-hh), which could, successively, be installed in same 100 km tunnel. The scientific capabilities integrated FCC programme would serve worldwide community throughout 21st century. also investigates LHC energy upgrade,...
By using the ATLAS detector, observations have been made of a centrality-dependent dijet asymmetry in collisions lead ions at Large Hadron Collider. In sample lead-lead events with per-nucleon center mass energy 2.76 TeV, selected minimum bias trigger, jets are reconstructed fine-grained, longitudinally segmented electromagnetic and hadronic calorimeters. The transverse energies dijets opposite hemispheres observed to become systematically more unbalanced increasing event centrality leading...
We review the physics opportunities of Future Circular Collider, covering its e+e-, pp, ep and heavy ion programmes. describe measurement capabilities each FCC component, addressing study electroweak, Higgs strong interactions, top quark flavour, as well phenomena beyond Standard Model. highlight synergy complementarity different colliders, which will contribute to a uniquely coherent ambitious research programme, providing an unmatchable combination precision sensitivity new physics.
In response to the 2013 Update of European Strategy for Particle Physics (EPPSU), Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC covered an energy-frontier hadron collider (FCC-hh), highest-luminosity high-energy lepton (FCC-ee), corresponding 100 km tunnel infrastructure, well physics opportunities these two colliders, and LHC, based on FCC-hh technology. This document constitutes third volume Conceptual Design Report,...
The jet energy scale and its systematic uncertainty are determined for jets measured with the ATLAS detector at LHC in proton-proton collision data a centre-of-mass of $\sqrt{s}=7\ \mathrm{TeV}$ corresponding to an integrated luminosity 38 pb−1. Jets reconstructed anti-k t algorithm distance parameters R=0.4 or R=0.6. Jet angle corrections from Monte Carlo simulations calibrate transverse momenta p T≥20 GeV pseudorapidities |η|<4.5. is estimated using single isolated hadron response situ...
Detailed measurements of the electron performance ATLAS detector at LHC are reported, using decays Z, W and J/psi particles. Data collected in 2010 sqrt(s)=7 TeV used, corresponding to an integrated luminosity almost 40 pb^-1. The inter-alignment inner electromagnetic calorimeter, determination energy scale resolution, terms response uniformity linearity discussed. identification, reconstruction trigger efficiencies, as well charge misidentification probability, also presented.
A search for squarks and gluinos in final states containing jets, missing transverse momentum no electrons or muons is presented. The data were recorded by the ATLAS experiment s=7TeV proton–proton collisions at Large Hadron Collider. No excess above Standard Model background expectation was observed 35pb−1 of analysed data. Gluino masses below 500 GeV are excluded 95% confidence level simplified models only first two generations, a gluino octet massless neutralino. exclusion increases to...
A search for high-mass dielectron and dimuon resonances in the mass range of 250 GeV to 6 TeV is presented. The data were recorded by ATLAS experiment proton-proton collisions at a centre-of-mass energy $\sqrt{s}=$13 during Run 2 Large Hadron Collider correspond an integrated luminosity 139 fb$^{-1}$. functional form fitted dilepton invariant-mass distribution model contribution from background processes, generic signal shape used determine significance observed deviations this estimate. No...
The measurement of missing transverse momentum in the ATLAS detector, described this paper, makes use full event reconstruction and a calibration based on reconstructed physics objects. performance is evaluated using data collected pp collisions at centre-of-mass energy 7 TeV 2010. Minimum bias events with jets hadrons are used from samples corresponding to an integrated luminosity about 0.3 nb−1 600 respectively, together containing Z boson decaying two leptons (electrons or muons) W lepton...
This paper describes the reconstruction of electrons and photons with ATLAS detector, as employed for measurements searches exploiting complete LHC Run 2 dataset. An improved energy clustering algorithm is introduced, its implications measurement identification are discussed in detail. Corrections calibrations that affect performance, including calibration, isolation efficiencies, charge reconstructed electron candidates determined using up to 81 fb$^{-1}$ proton-proton collision data...
This paper describes the measurement of elliptic flow charged particles in lead-lead collisions at sqrt(s_NN) = 2.76 TeV using ATLAS detector Large Hadron Collider (LHC). The results are based on an integrated luminosity approximately 7 ub^-1. Elliptic is measured over a wide region pseudorapidity, |eta| < 2.5, and broad range transverse momentum, 0.5 p_T 20 GeV. parameter v_2 obtained by correlating individual tracks with event plane energy deposited forward calorimeters. As function...
Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The uses proton-proton collision data corresponding to integrated luminosity 36.1 fb−1 at centre-of-mass energy 13 TeV collected 2015 2016 the ATLAS detector Large Hadron Collider. Events required have least one above 250 GeV no leptons (e or μ). Several signal regions considered increasing requirements on GeV. Good agreement is observed between number events...
Abstract The algorithms used by the ATLAS Collaboration during Run 2 of Large Hadron Collider to identify jets containing b -hadrons are presented. performance is evaluated in simulation and efficiency with which these measured collision data. measurement uses a likelihood-based method sample highly enriched $$t{\bar{t}}$$ <mml:math...
Abstract The standard model of particle physics 1–4 describes the known fundamental particles and forces that make up our Universe, with exception gravity. One central features is a field permeates all space interacts 5–9 . quantum excitation this field, as Higgs manifests itself boson, only no spin. In 2012, properties consistent boson was observed by ATLAS CMS experiments at Large Hadron Collider CERN 10,11 Since then, more than 30 times many bosons have been recorded experiment, enabling...
This paper describes the algorithms for reconstruction and identification of electrons in central region ATLAS detector at Large Hadron Collider (LHC). These were used all results with final state that are based on 2012 pp collision data produced by LHC $$\sqrt{\mathrm {s}}$$ = 8 $$\text {TeV}$$ . The efficiency these algorithms, together charge misidentification rate, is measured evaluated simulated samples using from $$Z\rightarrow ee$$ , ee\gamma $$ $$J/\psi \rightarrow decays. For...
Electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential for the ATLAS experiment record signals a wide variety of physics: Standard Model processes searches new phenomena in both proton-proton heavy-ion collisions. To cope with fourfold increase peak LHC luminosity 2015 2018 (Run 2), 2.1$\times$10$^{34}$cm$^{-2}$s$^{-1}$, similar number interactions per beam-crossing about 60, trigger algorithms selections were optimised control rates while retaining...
The ATLAS experiment at the LHC has measured Higgs boson couplings and mass, searched for invisible decays, using multiple production decay channels with up to 4.7 fb−1 of pp collision data $$ \sqrt{s}=7 TeV 20.3 \sqrt{s}=8 TeV. In current study, rates observed in γγ, ZZ, W , Zγ, bb, τ μμ channels, along results from associated a top-quark pair, are used probe scaling mass. Limits set on parameters extensions Standard Model including composite boson, an additional electroweak singlet,...
A bstract The distributions of event-by-event harmonic flow coefficients v n for = 2- 4 are measured in $ \sqrt{{{s_{NN }}}} 2 . 76 TeV Pb + collisions using the ATLAS detector at LHC. measurements performed charged particles with transverse momentum p T > 0 5 GeV and pseudorapidity range | η < a dataset approximately 7 μ b −1 recorded 2010. shapes suggest that associated vectors described by two-dimensional Gaussian function central over most centrality 3 Significant deviations from...
Dijet events are studied in the proton--proton collision dataset recorded at $\sqrt{s}=$13 TeV with ATLAS detector Large Hadron Collider 2015 and 2016, corresponding to integrated luminosities of 3.5 fb$^{-1}$ 33.5 respectively. Invariant mass angular distributions compared background predictions no significant deviation is observed. For resonance searches, a new method for fitting component invariant distribution employed. The then used set upper limits 95% confidence level on range physics...
Inclusive jet and dijet cross sections have been measured in proton-proton collisions at a center-of-mass energy of 7 TeV using the ATLAS detector Large Hadron Collider. The were jets clustered with anti-${k}_{t}$ algorithm parameters $R=0.4$ $R=0.6$. These measurements are based on 2010 data sample, consisting total integrated luminosity $37\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$. double-differential presented as function transverse momentum, bins rapidity. Dijet studied invariant...
Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination searches for $H\to\textrm{invisible}$ where $H$ is according to Standard Model via vector boson fusion, $Z(\ell\ell)H$, and $W\!/\!Z(\textrm{had})H$, all performed with ATLAS detector using 36.1 fb$^{-1}$ $pp$ collisions at center-of-mass energy $\sqrt s = 13$ TeV LHC. In results 7$ 8 TeV, an exclusion limit on branching ratio $0.26...