B. Wysłouch
A5019017643- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Nuclear reactor physics and engineering
- Particle Accelerators and Free-Electron Lasers
- Stochastic processes and statistical mechanics
- Radiation Detection and Scintillator Technologies
- Statistical Methods and Bayesian Inference
- Gamma-ray bursts and supernovae
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- Radiation Therapy and Dosimetry
- Scientific Computing and Data Management
- Advanced Data Storage Technologies
- Nuclear Physics and Applications
- International Science and Diplomacy
- Pediatric Urology and Nephrology Studies
Massachusetts Institute of Technology
2016-2025
Institute of High Energy Physics
2015-2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2022-2024
Moscow Institute of Thermal Technology
2024
Duquesne University
2023
University of Minnesota
2014-2023
Weizmann Institute of Science
2022
European Organization for Nuclear Research
1987-2013
UCLouvain
2013
This Letter presents measurements of the elliptic flow charged particles as a function pseudorapidity and centrality from Cu-Cu collisions at 62.4 200 GeV using PHOBOS detector Relativistic Heavy Ion Collider. The in is found to be significant even for most central events. For comparison with Au-Au results, it that detailed way which collision geometry (eccentricity) estimated critical importance when scaling out system-size effects. A new form eccentricity, called participant introduced...
Pseudorapidity distributions of charged particles emitted in $Au+Au$, $Cu+Cu$, $d+Au$, and $p+p$ collisions over a wide energy range have been measured using the PHOBOS detector at RHIC. The centrality dependence both particle multiplicity midrapidity were measured. with $|\eta|<5.4$, which account for between 95% 99% total charged-particle emission associated collision participants, are presented different centralities. Both density, $dN_{ch}/d\eta$, multiplicity, $N_{ch}$, found to...
Proton–nucleus (p+A) collisions have long been recognized as a crucial component of the physics program with nuclear beams at high energies, in particular for their reference role to interpret and understand nucleus–nucleus data well potential elucidate partonic structure matter low parton fractional momenta (small-x). Here, we summarize main motivations that make proton–nucleus run decisive ingredient successful heavy-ion Large Hadron Collider (LHC) present unique scientific opportunities...
This paper describes the measurement of collective flow for charged particles in Au+Au collisions at sqrt[s(NN)]=130 GeV using PHOBOS detector Relativistic Heavy Ion Collider (RHIC). The measured azimuthal hit anisotropy is presented over a wide range pseudorapidity (-5.0<eta<5.3) first time this energy. result, averaged momenta and particle species, observed to reach 7% peripheral midrapidity, falling off with centrality increasing |eta|. These results call into question common assumption...
The centrality dependence of the midrapidity charged particle multiplicity in Au+Au heavy-ion collisions at √sNN=19.6 and 200GeV is presented. Within a simple model, fraction hard (scaling with number binary collisions) to soft participant pairs) interactions consistent value x=0.13±0.01(stat)±0.05(syst) both energies. experimental results energies, scaled by inelastic p(¯p)+p collision data, agree within systematic errors. ratio data was found not depend on over studied range yields linear...
The measured pseudorapidity distribution of primary charged particles in minimum-bias d+Au collisions at sqrt[s(NN)]=200 GeV is presented for the first time. This falls off less rapidly gold direction as compared to deuteron direction. average value particle density midrapidity <dN(ch)/d eta>|eta|< or =0.6)=9.4+/-0.7(syst) and integrated multiplicity region 82+/-6(syst). Estimates total production, based on extrapolations outside region, are also presented. distribution, normalized number...
We present a measurement of the pseudorapidity density primary charged particles near mid-rapidity in Au+Au collisions at sqrt(s_NN) = 130 GeV as function number participating nucleons. These results are compared to models an attempt discriminate between competing scenarios particle production heavy ion collisions.
We have measured transverse momentum distributions of charged hadrons produced in $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$ collisions at $\sqrt{{s}_{NN}}=62.4\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}$. The spectra are presented for momenta $0.25<{p}_{T}<4.5\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$, a pseudorapidity range $0.2<\ensuremath{\eta}<1.4$. nuclear modification factor ${R}_{AA}$ is calculated relative to $p+p$ data the same collision energy as function centrality. For...
Forward-backward correlations of charged-particle multiplicities in symmetric bins pseudorapidity are studied to gain insight into the underlying correlation structure particle production Au+Au collisions. The PHOBOS detector is used measure integrated centered at \ensuremath{\eta}, defined within $|\ensuremath{\eta}|<3$, and covering intervals $\ensuremath{\Delta}\ensuremath{\eta}$. variance ${\ensuremath{\sigma}}_{C}^{2}$ a suitably forward-backward asymmetry variable $C$ calculated as...
The results of a high-statistics study inclusive muon spectra at PETRA are reported. Improved mass limits have been obtained for heavy quarks, leptons, and charged Higgs particles. It is shown that the fragmentation properties b quarks c different, with mean variables 〈zb〉=0.75±0.03±0.06, 〈zc〉=0.46±0.02±0.05 average semileptonic branching ratio B C hadrons R(B)=(10.5±1.5±1.3)%, R(C)=(11.5±1.0±1.7)%.Received 22 April 1983DOI:https://doi.org/10.1103/PhysRevLett.51.443©1983 American Physical Society
With use of the MARK-J detector at $\sqrt{s}=34.7$ GeV 21 000 ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadron}$ events have been collected. By measurement asymmetry in angular energy correlations strong coupling constant ${\ensuremath{\alpha}}_{s}=0.13\ifmmode\pm\else\textpm\fi{}0.01 (\mathrm{statistical})\ifmmode\pm\else\textpm\fi{}0.02 (\mathrm{systematic})$ is determined, complete second order, and independent fragmentation models QCD cutoff values used.
We present results on two-particle angular correlations in proton-proton collisions at center-of-mass energies of 200 and 410 GeV. The PHOBOS experiment the BNL Relativistic Heavy Ion Collider has a uniquely large coverage for charged particles, giving opportunity to explore both short- long-range scales. At energies, complex two-dimensional correlation structure Δη Δϕ is observed. In context an independent cluster model short-range correlations, size its decay width are extracted from...
We present transverse momentum distributions of charged hadrons produced in Cu+Cu collisions at sqrt(s) = 62.4 and 200 GeV. The spectra are measured for momenta 0.25 < p_T 5.0 GeV/c GeV 7.0 GeV, a pseudo-rapidity range 0.2 eta 1.4. nuclear modification factor R_AA is calculated relative to p+p data both collision energies as function centrality. At given energy fractional cross-section, observed be systematically larger compared Au+Au. However, the same number participating nucleons,...
With a PETRA energy scan in \ensuremath{\le}30-MeV steps, the continuum production of open top quark up to 38.54 GeV is excluded. Over regions from 29.90 38.63 limits are set on product hadronic branching ratio and electronic width ${B}_{h}{\ensuremath{\Gamma}}_{\mathrm{ee}}$ for toponium be less than 2.0 keV at 95% confidence level. By search flavor-changing neutral currents $b$ decay, models without
We have measured the transverse momentum distributions of charged hadrons in d+Au collisions at sqrt sNN = 200 GeV range 0.5 < p_T 4.0 GeV/c. The total pseudorapidity, eta, is 0.2 eta 1.4, where positive deuteron direction. data has been divided into three regions covering 0.6, 0.6 \eta 1.0, and 1.0 1.4 compared to hadron spectra from p+pbar same energy. There a significant change spectral shape as function pseudorapidity. As increases we see decrease nuclear modification factor RdAu.
We use the reaction e+e−→hadrons, in Mark J detector at DESY electron-positron collider PETRA, to determine hadronic cross section up 46.78 GeV. The production of a top quark with charge equal (2/3) is excluded 46.6 GeV 95% C.L. observed rise higher energies consistent electroweak prediction for Z0 mass 93 describe some unusual muon inclusive events.Received 27 January 1986DOI:https://doi.org/10.1103/PhysRevD.34.681©1986 American Physical Society
Two-particle correlations of identical charged pion pairs from Au+Au collisions at $\sqrt{{s}_{\mathit{NN}}}=62.4$ and 200 GeV were measured by the PHOBOS experiment BNL Relativistic Heavy Ion Collider (RHIC). Data for 15% most central events analyzed with Bertsch-Pratt Yano-Koonin-Podgoretskii parametrizations using rapidities $0.4<{y}_{\ensuremath{\pi}\ensuremath{\pi}}<1.3$ transverse momenta $0.1<{k}_{T}<1.4$ GeV/c. The radii ${R}_{o}$ ${R}_{\ensuremath{\ell}}$ decrease as a function pair...
We report mass limits on the ${\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{Z}}^{0}$ and \~{}\fi{}}{W}}^{\ifmmode\pm\else\textpm\fi{}}$, supersymmetric partners of ${Z}^{0}$ ${W}^{\ifmmode\pm\else\textpm\fi{}}$, respectively, using MARK-J detector at PETRA. The experimental signatures in both cases are acoplanar lepton pairs with missing energy. For an additional signature is a single energetic lepton. No evidence found for either \~{}\fi{}}{Z}}^{0}({M}_{{\stackrel{\ifmmode...
We have searched for resonances in the reaction ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons}, \ensuremath{\gamma}\ensuremath{\gamma}, \ensuremath{\mu}\ensuremath{\mu}, \mathrm{and} \mathrm{ee}$, energy range $39.79<\sqrt{s}<45.52$ GeV, using Mark J detector at PETRA. obtain stringent upper limits on production of toponium and particles postulated to explain ${Z}^{0}\ensuremath{\rightarrow}\mathrm{lepton}\mathrm{pair}+\ensuremath{\gamma}$ events observed CERN...
The CMS experiment at the LHC is a general-purpose apparatus with set of large acceptance and high granularity detectors for hadrons, electrons, photons muons, providing unique capabilities both proton–proton ion–ion collisions. data collected during November 2010 Pb–Pb run = 2.76 TeV were analyzed multiple measurements properties hot dense matter obtained. Global event properties, detailed study jet production isolated photons, quarkonia weak bosons measured compared to pp Monte Carlo simulations.