A5100712204- 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
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Advanced Data Storage Technologies
- advanced mathematical theories
- International Science and Diplomacy
- Nuclear physics research studies
- Stochastic processes and statistical mechanics
- Electron and X-Ray Spectroscopy Techniques
- Nuclear Physics and Applications
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2016-2025
University of Chicago
2024
European Organization for Nuclear Research
2018-2024
Fermi National Accelerator Laboratory
2024
Pontificia Universidad Católica de Chile
2023-2024
University of California, Santa Cruz
2023-2024
Atlas Scientific (United States)
2024
A. Alikhanyan National Laboratory
2024
The University of Adelaide
2013-2023
TU Dortmund University
2020
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,...
A search for the electroweak production of charginos and sleptons decaying into final states with two electrons or muons is presented. The analysis based on 139 fb$^{-1}$ proton-proton collisions recorded by ATLAS detector at Large Hadron Collider $\sqrt{s}=13$ TeV. Three $R$-parity-conserving scenarios where lightest neutralino supersymmetric particle are considered: chargino pairs decays via either $W$ bosons sleptons, direct slepton pairs. optimised first these scenarios, but results also...
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...
Jet energy scale and resolution measurements with their associated uncertainties are reported for jets using 36-81 fb$^{-1}$ of proton-proton collision data a centre-of-mass $\sqrt{s}=13$ TeV collected by the ATLAS detector at LHC. Jets reconstructed two different input types: topo-clusters formed from deposits in calorimeter cells, as well an algorithmic combination charged-particle tracks those topo-clusters, referred to particle-flow reconstruction method. The anti-$k_t$ jet algorithm...
This article documents the muon reconstruction and identification efficiency obtained by ATLAS experiment for 139 fb$^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV collected between 2015 2018 during Run 2 LHC. The increased instantaneous luminosity delivered LHC over this period required a reoptimisation criteria prompt muons. Improved newly developed algorithms were deployed to preserve high with low misidentification rate good momentum resolution. availability large samples...
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,...
A search for the dimuon decay of Standard Model (SM) Higgs boson is performed using data corresponding to an integrated luminosity 139 fb$^{-1}$ collected with ATLAS detector in Run2 $pp$ collisions at $\sqrt{s}=13$ TeV Large Hadron Collider. The observed (expected) significance over background-only hypothesis a mass 125.09 GeV $2.0\,\sigma$ ($1.7\,\sigma$). upper limit on cross section times branching ratio $pp \to H \mu\mu$ 2.2 SM prediction 95% confidence level, while expected $H signal...
Abstract The ATLAS experiment at the Large Hadron Collider has a broad physics programme ranging from precision measurements to direct searches for new particles and interactions, requiring ever larger more accurate datasets of simulated Monte Carlo events. Detector simulation with Geant4 is but requires significant CPU resources. Over past decade, developed utilized tools that replace most CPU-intensive component simulation—the calorimeter shower simulation—with faster methods. Here,...
The flavour-tagging algorithms developed by the ATLAS Collaboration and used to analyse its dataset of $\sqrt s = 13$ TeV $pp$ collisions from Run 2 Large Hadron Collider are presented. These new tagging based on recurrent deep neural networks, their performance is evaluated in simulated collision events. developments yield considerable improvements over previous jet-flavour identification strategies. At 77% $b$-jet efficiency operating point, light-jet (charm-jet) rejection factors 170 (5)...
Many extensions of the Standard Model predict production dark matter particles at LHC. Sufficiently light may be produced in decays Higgs boson that would appear invisible to detector. This Letter presents a statistical combination searches for H $\rightarrow$ where multiple modes are considered. These performed with ATLAS detector using 139 fb$^{-1}$ proton-proton collisions centre-of-mass energy $\sqrt{s} =13$ TeV In results =7$ and 8 TeV, an upper limit on branching ratio 0.107 (0.077)...
The first evidence for the Higgs boson decay to a <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>Z</a:mi></a:math> and photon is presented, with statistical significance of 3.4 standard deviations. result derived from combined analysis searches performed by ATLAS CMS Collaborations proton-proton collision datasets collected at CERN Large Hadron Collider (LHC) 2015 2018. These correspond integrated luminosities around <c:math...
Abstract The need for large-scale production of highly accurate simulated event samples the extensive physics programme ATLAS experiment at Large Hadron Collider motivates development new simulation techniques. Building on recent success deep learning algorithms, variational autoencoders and generative adversarial networks are investigated modelling response central region electromagnetic calorimeter to photons various energies. properties synthesised showers compared with from a full...
Abstract The ATLAS detector is installed in its experimental cavern at Point 1 of the CERN Large Hadron Collider. During Run 2 LHC, a luminosity ℒ = × 10 34 cm -2 s -1 was routinely achieved start fills, twice design luminosity. For 3, accelerator improvements, notably levelling, allow sustained running an instantaneous , with average up to 60 interactions per bunch crossing. has been upgraded recover single-lepton trigger thresholds while operating comfortably under 3 pileup conditions. A...
A measurement of event-plane correlations involving two or three event planes different order is presented as a function centrality for 7 ub-1 Pb+Pb collision data at sqrt(s_NN)=2.76 TeV, recorded by the ATLAS experiment LHC. Fourteen correlators are measured using standard method and scalar-product method, latter found to give systematically larger correlation signal. Several trends in dependence these observed. These not reproduced predictions based on Glauber model, which includes only...
A measurement of production cross sections the Higgs boson in proton-proton collisions is presented $H\ensuremath{\rightarrow}\ensuremath{\tau}\ensuremath{\tau}$ decay channel. The analysis performed using $36.1\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data recorded by ATLAS experiment at Large Hadron Collider a center-of-mass energy $\sqrt{s}=13\text{ }\mathrm{TeV}$. All combinations leptonic ($\ensuremath{\tau}\ensuremath{\rightarrow}\ensuremath{\ell}v\overline{v}$ with...
Several models of physics beyond the Standard Model predict neutral particles that decay into final states consisting collimated jets light leptons and hadrons (so-called “lepton jets”). These can also be long-lived with length comparable to, or even larger than, LHC detectors’ linear dimensions. This paper presents results a search for lepton in proton-proton collisions at centre-of-mass energy $$ \sqrt{s}=8 TeV sample 20.3 fb−1 collected during 2012 ATLAS detector LHC. Limits on predicting...
The top quark mass is measured using a template method in the $$t\bar{t} \rightarrow \mathrm {lepton+jets}$$ channel (lepton e or $$\mu $$ ) ATLAS data recorded 2012 at LHC. were taken proton–proton centre-of-mass energy of $${\sqrt{s}} =8$$ $$\text {TeV}$$ and correspond to an integrated luminosity $$20.2$$ fb $$^{-1}$$ . characterized by presence charged lepton, neutrino four jets, two which originate from bottom quarks (b). Exploiting three-dimensional technique, determined together with...
Abstract Measurements of the Standard Model Higgs boson decaying into a $$b\bar{b}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>b</mml:mi> <mml:mover> </mml:mrow> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> pair and produced in association with W or Z leptons, using proton–proton collision data collected between 2015 2018 by ATLAS detector, are presented. The measurements use collisions Large Hadron Collider at centre-of-mass energy $$\sqrt{s} = 13\,\text...
A measurement of
A search for new-physics resonances decaying into a lepton and jet performed by the ATLAS experiment is presented. Scalar leptoquarks pair-produced in $pp$ collisions at $\sqrt{s}=13$ TeV Large Hadron Collider are considered using an integrated luminosity of 139 fb$^{-1}$, corresponding to full Run 2 dataset. They searched events with two electrons or muons more jets, including jets identified as arising from fragmentation $c$- $b$-quarks. The observed yield each channel consistent Standard...
A bstract search for the supersymmetric partners of quarks and gluons (squarks gluinos) in final states containing jets missing transverse momentum, but no electrons or muons, is presented. The data used this were recorded by ATLAS experiment proton-proton collisions at a centre-of-mass energy $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 13 TeV during Run 2 Large Hadron Collider, corresponding to an integrated...
Abstract Higgs boson properties are studied in the four-lepton decay channel (where lepton = e , $$\mu $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>μ</mml:mi> </mml:math> ) using 139 $$\hbox {fb}^{-1}$$ <mml:msup> <mml:mtext>fb</mml:mtext> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> of proton–proton collision data recorded at $$\sqrt{s}=$$ <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> 13 TeV by ATLAS experiment Large...