Hans Van Haevermaet
A5105783068- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Pulsars and Gravitational Waves Research
- Computational Physics and Python Applications
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Magnetic confinement fusion research
- Geophysics and Sensor Technology
- Radio Astronomy Observations and Technology
- Black Holes and Theoretical Physics
- Superconducting Materials and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Distributed and Parallel Computing Systems
- Radiation Therapy and Dosimetry
- Advanced Frequency and Time Standards
- Radioactivity and Radon Measurements
- Atomic and Subatomic Physics Research
University of Antwerp
2015-2024
Centre National de la Recherche Scientifique
2023
Université Paris Cité
2023
Laboratoire AstroParticule et Cosmologie
2023
Institute of High Energy Physics
2013-2023
A. Alikhanyan National Laboratory
2023
Karlsruhe Institute of Technology
2017
Center for Migration Studies of New York
2016
European Organization for Nuclear Research
2014
Université de Strasbourg
2011
The jet fragmentation function of inclusive jets with transverse momentum ${p}_{\mathrm{T}}$ above $100\phantom{\rule{0.28em}{0ex}}\text{GeV}/c$ in PbPb collisions has been measured using reconstructed charged particles $1\phantom{\rule{0.28em}{0ex}}\text{GeV}/c$ a cone radius 0.3 around the axis. A data sample collected 2011 at nucleon-nucleon center-of-mass energy $\sqrt{{s}_{{}_{\mathit{NN}}}}=2.76\phantom{\rule{0.28em}{0ex}}\text{TeV}$ corresponding to an integrated luminosity...
An upgrade program is planned for the LHC which will smoothly bring luminosity up to or above 5×1034 cm−2 s−1 sometimes after 2020, possibly reach an integrated of 3000 fb−1 at end that decade. In this ultimate scenario, called Phase-2, when High Luminosity phase (HL-LHC), CMS need a completely new Tracker detector, in order fully exploit highly-demanding operating conditions and delivered luminosity. The should have also trigger capabilities. To achieve such goals, R&D activities are...
An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at sqrt(s) = 7 TeV and 8 LHC, with integrated luminosities of up 5.3 4.1 inverse femtobarns, respectively, are combined. No evidence a resonance observed. The analysis combined data sets excludes, 95% confidence level, Sequential Standard Model Z'[SSM] lighter than 2590 GeV, superstring-inspired Z'[psi] 2260 Kaluza-Klein gravitons 2390 (2030)...
The differential production cross sections of ${B}^{\ifmmode\pm\else\textpm\fi{}}$ mesons are measured via the exclusive decay channels ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}{K}^{\ifmmode\pm\else\textpm\fi{}}$ as a function transverse momentum in $p$$p$ and Pb-Pb collisions at center-of-mass energy $\sqrt{{s}_{NN}}=5.02\text{ }\text{...
A multivariate likelihood method to measure electroweak couplings with the Drell-Yan process at LHC is presented. The described by dilepton rapidity, invariant mass, and decay angle distributions. ambiguity due unknown assignment of scattered constituent quark antiquark two protons in a collision resolved statistically using correlations between observables. applied sample dimuon events from proton-proton collisions sqrt(s) = 7 TeV collected CMS experiment LHC, corresponding an integrated...
A search for direct production of top squark pairs in events with jets and large transverse momentum imbalance is presented. The data are based on proton-proton collisions at a center-of-mass energy 13 TeV, collected the CMS detector 2016 CERN LHC, correspond to an integrated luminosity 35.9 fb−1. considers variety R-parity conserving supersymmetric models, including ones which neutralino masses nearly degenerate. Specialized jet reconstruction tools developed exploit unique characteristics...
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...
The result of a search at the LHC for heavy stable charged particles produced in pp collisions $ \sqrt {s} = 7\;{\text{TeV}} is described. data sample was collected with CMS detector and corresponds to an integrated luminosity 3.1 pb−1. Momentum ionization-energy-loss measurements inner tracker are used identify tracks compatible slow-moving particles. Additionally, passing muon identification requirements also analyzed same signature. In each case, no candidate passes selection, expected...
A search for charged Higgs bosons produced via vector boson fusion and decaying into $W$ $Z$ using proton-proton collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ is presented. The data sample corresponds to an integrated luminosity of $15.2\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with the CMS detector in 2015 2016. event selection requires three leptons (electrons or muons), two jets large pseudorapidity separation high dijet mass, missing transverse momentum. observation...
Azimuthal correlations of charged particles in xenon-xenon collisions at a center-of-mass energy per nucleon pair $\sqrt{{s}_{\mathrm{NN}}}=5.44$ TeV are studied. The data were collected by the CMS experiment LHC with total integrated luminosity $3.42\phantom{\rule{0.16em}{0ex}}\phantom{\rule{0.16em}{0ex}}\ensuremath{\mu}{\text{b}}^{\ensuremath{-}1}$. collective motion system formed collision is parametrized Fourier expansion azimuthal particle density distribution. anisotropy coefficients...
An inclusive search for same-sign top-quark pair production in pp collisions at $ \sqrt {s} = 7 TeV is performed using a data sample recorded with the CMS detector 2010, corresponding to an integrated luminosity of 35 pb−1. This analysis motivated by recent studies \text{p}\bar{\text{p}} \to \text{t}\bar{\text{t}} reporting mass-dependent forward-backward asymmetries larger than expected from standard model. These could be due Flavor Changing Neutral Currents (FCNC) top sector induced...
Hadronic event shapes have been measured in proton-proton collisions at sqrt(s)=7 TeV, with a data sample collected the CMS detector LHC. The corresponds to an integrated luminosity of 3.2 inverse picobarns. Event-shape distributions, corrected for response, are compared five models QCD multijet production.
Abstract This paper presents new sets of parameters (“tunes”) for the underlying-event model $${\textsc {herwig}} \,7$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mstyle> <mml:mi>H</mml:mi> <mml:mi>E</mml:mi> <mml:mi>R</mml:mi> <mml:mi>W</mml:mi> <mml:mi>I</mml:mi> <mml:mi>G</mml:mi> </mml:mstyle> <mml:mspace /> <mml:mn>7</mml:mn> </mml:mrow> </mml:math> event generator. These control description multiple-parton interactions (MPI) and colour reconnection in ,...
A search for narrow low-mass resonances decaying to quark-antiquark pairs is presented. The based on proton-proton collision events collected at 13 TeV by the CMS detector CERN LHC. data sample corresponds an integrated luminosity of 35.9 fb^{-1}, recorded in 2016. considers case where resonance has high transverse momentum due initial-state radiation a hard photon. To study this process, decay products are reconstructed as single large-radius jet with two-pronged substructure. signal would...
A general search for the pair production of resonances, each decaying to two quarks, is reported. The conducted separately heavier resonances (masses above 400 GeV), where four final-state quarks generates a hadronic jet resulting in four-jet signature, and lighter between 80 from resonance collimated reconstructed as single two-jet signature. In addition, $b$-tagged selection applied target with bottom quark final state. analysis uses data collected CMS detector at CERN LHC, corresponding...
A search is conducted for a low-mass charged Higgs boson produced in top quark decay and subsequently decaying into charm strange quark. The data sample was recorded proton-proton collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ by the CMS experiment LHC corresponds to an integrated luminosity of $35.9\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. performed process pair production, where one decays bottom other $W$ boson. With lepton (electron or muon) neutrino, final state comprises...
The differential cross section and charge asymmetry for inclusive W boson production at $\sqrt{s} =$ 13 TeV is measured the two transverse polarization states as a function of absolute rapidity. measurement uses events in which decays to neutrino either muon or an electron. data sample proton-proton collisions recorded with CMS detector LHC 2016 corresponds integrated luminosity 35.9 fb$^{-1}$. its value normalized total are over rapidity range $|y_\mathrm{W}|$ $\lt$ 2.5. In addition...
We present performance studies of a full-length prototype for the CASTOR quartz-tungsten sampling calorimeter, installed in very forward region CMS experiment at LHC. The response linearity and energy resolution, uniformity, as well showers’ spatial properties have been studied with electrons, pions muons various energies. A special study was also carried out testing light-output 90-degree cut quartz plates calorimeter. data were taken during test beam CERN/SPS 2007.
Multiple Partonic Interactions are often crucial for interpreting results obtained at the Large Hadron Collider (LHC). The quest a sound understanding of dynamics behind MPI - particularly this time when LHC is due to start its "Run II" operations has focused aim workshop. MPI@LHC2014 concentrated mainly on phenomenology measurements whilst keeping in perspective those previous hadron colliders. workshop also debated some state-of-the-art theoretical considerations and modeling Monte Carlo...
Ratios of cross sections, $\ensuremath{\sigma}(Z+c\text{ }\text{ }\text{jets})/\ensuremath{\sigma}(Z+\text{jets})$, $\ensuremath{\sigma}(Z+b\text{ and }\text{jets})/\phantom{\rule{0ex}{0ex}}\ensuremath{\sigma}(Z+b\text{ }\text{jets})$ in the associated production a $Z$ boson with at least one charm or bottom quark jet are measured proton-proton collisions $\sqrt{s}=13\text{ }\mathrm{TeV}$. The data sample, collected by CMS experiment CERN LHC, corresponds to an integrated luminosity...
The third-generation of gravitational wave observatories, such as the Einstein Telescope (ET) and Cosmic Explorer (CE), aim for an improvement in sensitivity at least a factor ten over wide frequency range compared to current advanced detectors. In order inform design detectors develop qualify their subsystems, dedicated test facilities are required. ETpathfinder prototype uses full interferometer configurations aims provide high facility similar environment ET. Along with interferometry...
The structure of nucleons is multidimensional and depends on the transverse momenta, spatial geometry, polarization constituent partons. Such a can be studied using high-energy photons produced in ultraperipheral heavy-ion collisions. first measurement azimuthal angular correlations exclusively events with two jets photon-lead interactions at large momentum transfer presented, process that considered to sensitive underlying nuclear gluon polarization. This study uses data sample lead-lead...