S. Van Putte
A5032756593- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Radiation Effects in Electronics
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Big Data Technologies and Applications
- Noncommutative and Quantum Gravity Theories
- CCD and CMOS Imaging Sensors
- Nuclear physics research studies
- Particle Accelerators and Free-Electron Lasers
- Nuclear reactor physics and engineering
- Laser-Plasma Interactions and Diagnostics
- Random Matrices and Applications
- Quantum, superfluid, helium dynamics
Vrije Universiteit Brussel
2023-2025
Institute of High Energy Physics
2023-2024
University of Antwerp
2019-2024
A. Alikhanyan National Laboratory
2023-2024
Abstract Since the initial data taking of CERN LHC, CMS experiment has undergone substantial upgrades and improvements. This paper discusses detector as it is configured for third data-taking period Run 3, which started in 2022. The entire silicon pixel tracking was replaced. A new powering system superconducting solenoid installed. electronics hadron calorimeter upgraded. All muon electronic systems were upgraded, stations added, including a gas electron multiplier detector. precision...
A search is reported for near-threshold structures in the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>J</a:mi><a:mo>/</a:mo><a:mi>ψ</a:mi><a:mi>J</a:mi><a:mo>/</a:mo><a:mi>ψ</a:mi></a:mrow></a:math> invariant mass spectrum produced proton-proton collisions at <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:msqrt><c:mrow><c:mi>s</c:mi></c:mrow></c:msqrt><c:mo>=</c:mo><c:mn>13</c:mn><c:mtext> </c:mtext><c:mtext>...
Abstract This paper describes the Combine software package used for statistical analyses by CMS Collaboration. The package, originally designed to perform searches a Higgs boson and combined analysis of those searches, has evolved become tool presently in majority measurements performed It is not specific experiment, this intended serve as reference users outside Collaboration, providing an outline most salient features capabilities. Readers are provided with possibility run reproduce...
Machine-learning (ML) techniques are explored to identify and classify hadronic decays of highly Lorentz-boosted W/Z/Higgs bosons top quarks. Techniques without ML have also been evaluated included for comparison. The identification performances a variety algorithms characterized in simulated events directly compared with data. validated using proton-proton collision data at √s = 13TeV, corresponding an integrated luminosity 35.9 fb−1. Systematic uncertainties assessed by comparing the...
This Letter presents a search for direct production of charginos and neutralinos via electroweak interactions. The results are based on data from proton-proton collisions at center-of-mass energy 13 TeV collected with the CMS detector LHC, corresponding to an integrated luminosity 137 fb$^{-1}$. considers final states large missing transverse momentum pairs hadronically decaying bosons WW, WZ, WH, where H is Higgs boson. These identified using novel algorithms. No significant excess events...
Since the initial data taking of CERN LHC, CMS experiment has undergone substantial upgrades and improvements. This paper discusses detector as it is configured for third data-taking period Run 3, which started in 2022. The entire silicon pixel tracking was replaced. A new powering system superconducting solenoid installed. electronics hadron calorimeter upgraded. All muon electronic systems were upgraded, stations added, including a gas electron multiplier detector. precision proton...
A search for decays to invisible particles of Higgs bosons produced in association with a top-antitop quark pair or vector boson, which both decay fully hadronic final state, has been performed using proton-proton collision data collected at s=13TeV by the CMS experiment LHC, corresponding an integrated luminosity 138fb-1. The 95% confidence level upper limit set on branching fraction 125GeV boson particles, B(H→inv), is 0.54 (0.39 expected), assuming standard model production cross...
Abstract A test of lepton flavor universality in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msup> <mml:mtext>B</mml:mtext> <mml:mo>±</mml:mo> </mml:mrow> </mml:msup> <mml:mo accent="false" stretchy="false">→</mml:mo> <mml:mtext>K</mml:mtext> <mml:mi>μ</mml:mi> <mml:mo>+</mml:mo> <mml:mo>−</mml:mo> </mml:math> and <mml:mtext>e</mml:mtext> decays, as well a measurement differential integrated branching fractions nonresonant decay are presented....
Energy correlators that describe energy-weighted distances between two or three particles in a hadronic jet are measured using an event sample of sqrt[s]=13 TeV proton-proton collisions collected by the CMS experiment and corresponding to integrated luminosity 36.3 fb^{-1}. The distributions consistent with trends simulation reveal key features strong interaction: confinement asymptotic freedom. By comparing ratio three- two-particle energy correlator theoretical calculations resum collinear...
A bstract search for long-lived heavy neutral leptons (HNLs) using proton-proton collision data corresponding to an integrated luminosity of 138 fb − 1 collected at $$ \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 with the CMS detector CERN LHC is presented. Events are selected a charged lepton originating from primary vertex associated interaction, as well second and hadronic jet secondary that corresponds...
A search for dark matter particles is performed using events with a Z boson candidate and large missing transverse momentum. The analysis based on proton-proton collision data at center-of-mass energy of 13 TeV, collected by the CMS experiment LHC in 2016-2018, corresponding to an integrated luminosity 137 fb$^{-1}$. uses decay channels $\to$ ee $\mu\mu$. No significant excess observed over background expected from standard model. Limits are set particle production context simplified models...
An inclusive search is presented for long-lived particles using displaced jets. The uses a data sample collected with the CMS detector at CERN LHC in 2017 and 2018, from proton-proton collisions center-of-mass energy of 13 TeV. results this are combined those previous 2016, yielding total integrated luminosity $132\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. analysis searches distinctive topology tracks vertices associated dijet system. For simplified model, where pair-produced neutral...
A tagging algorithm to identify jets that are significantly displaced from the proton-proton (pp) collision region in CMS detector at LHC is presented. Displaced can arise decays of long-lived particles (LLPs), which predicted by several theoretical extensions standard model. The tagger a multiclass classifier based on deep neural network, parameterised according proper decay length $\mathrm{c}\tau_0$ LLP. novel scheme defined reliably label LLP for supervised learning. Samples pp data,...
The observation of the production four top quarks in proton-proton collisions is reported, based on a data sample collected by CMS experiment at center-of-mass energy 13 TeV 2016–2018 CERN LHC and corresponding to an integrated luminosity 138fb−1. Events with two same-sign, three, or charged leptons (electrons muons) additional jets are analyzed. Compared previous results these channels, updated identification techniques for originating from hadronization b quarks, as well revised...
Abstract Measurements of Higgs boson production, where the decays into a pair $$\uptau $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>τ</mml:mi> </mml:math> leptons, are presented, using sample proton-proton collisions collected with CMS experiment at center-of-mass energy "Equation missing"<!-- image only, no MathML or LaTex -->, corresponding to an integrated luminosity 138 $$\,\text {fb}^{-1}$$ <mml:mrow> <mml:mspace /> <mml:msup> <mml:mtext>fb</mml:mtext>...
A search for the direct production of a pair $\ensuremath{\tau}$ sleptons, supersymmetric partners leptons, is presented. Each slepton assumed to decay lepton and lightest particle (LSP), which be stable not interact in detector, leading an imbalance total reconstructed transverse momentum. The carried out events identified as containing two each decaying one or more hadrons neutrino, significant momentum imbalance. In addition scenarios sleptons promptly, also addresses have sufficiently...
A search is presented for charged, long-lived supersymmetric particles in final states with one or more disappearing tracks. The based on data from proton-proton collisions at a center-of-mass energy of 13 TeV collected the CMS detector CERN LHC between 2016 and 2018, corresponding to an integrated luminosity <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>137</a:mn><a:mtext> </a:mtext><a:mtext>...
Abstract Ultrarelativistic nuclear collisions create a strongly interacting state of hot and dense quark–gluon matter that exhibits remarkable collective flow behavior with minimal viscous dissipation. To gain deeper insights into its intrinsic nature fundamental degrees freedom, we determine the speed sound in an extended volume plasma using lead–lead (PbPb) at center-of-mass energy per nucleon pair 5.02 TeV. The data were recorded by CMS experiment CERN LHC correspond to integrated...
Measurements of differential and double-differential cross sections top quark pair ($\text{t}\overline{\text{t}}$) production are presented in the lepton+jets channels with a single electron or muon jets final state. The analysis combines for first time signatures quarks low transverse momentum $p_\text{T}$, where decay products can be identified as separated isolated leptons, high collimated overlap. measurements based on proton-proton collision data at $\sqrt{s} = $ 13 TeV collected by CMS...
A search for heavy neutral leptons (HNLs) decaying in the CMS muon system is presented. data sample used corresponding to an integrated luminosity of 138 fb$^{-1}$ proton-proton collisions at $\sqrt{s}$ = 13 TeV, recorded CERN LHC 2016-2018. Decay products long-lived HNLs could interact with shielding materials and create hadronic electromagnetic showers detected chambers. This distinctive signature provides a unique handle masses below 4 GeV proper decay lengths order meters. The sensitive...
A search is performed for charged-lepton flavor violating processes in top quark (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>t</a:mi></a:math>) production and decay. The data were collected by the CMS experiment from proton-proton collisions at a center-of-mass energy of 13 TeV correspond to an integrated luminosity <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mn>138</c:mn><c:mtext> </c:mtext><c:mtext>...
Abstract A measurement of the dijet production cross section is reported based on proton–proton collision data collected in 2016 at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mspace/> <mml:mi>Te</mml:mi> <mml:mi>V</mml:mi> </mml:mrow> </mml:math> by CMS experiment CERN LHC, corresponding to an integrated luminosity up 36.3...