C. Markert
A5008268532- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Stochastic processes and statistical mechanics
- Statistical Methods and Bayesian Inference
- Atomic and Molecular Physics
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Superconducting Materials and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- X-ray Spectroscopy and Fluorescence Analysis
- CCD and CMOS Imaging Sensors
- Pediatric Urology and Nephrology Studies
- Statistical Mechanics and Entropy
- Computational Physics and Python Applications
- Laser-induced spectroscopy and plasma
- Particle Accelerators and Free-Electron Lasers
- Theoretical and Computational Physics
- Astrophysics and Cosmic Phenomena
- advanced mathematical theories
The University of Texas at Austin
2016-2025
University of Houston
2018-2024
A. Alikhanyan National Laboratory
2013-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2012-2023
COMSATS University Islamabad
2023
Variable Energy Cyclotron Centre
2020
Homi Bhabha National Institute
2020
Universidade Estadual de Campinas (UNICAMP)
2018
Enrico Fermi Center for Study and Research
2012-2016
European Organization for Nuclear Research
1999-2013
Directed and elliptic flow measurements for charged pions protons are reported as a function of transverse momentum, rapidity, centrality 40A 158AGeV Pb+Pb collisions, recorded by the NA49 detector. Both standard method correlating particles with an event plane cumulant studying multiparticle correlations used. In directed is corrected conservation momentum. reconstructed from genuine four-, six-, eight-particle correlations, showing first unequivocal evidence collective motion in A+A...
Results of resonance searches in the Xi(-)pi(-), Xi(-)pi(+), Xi;(+)pi(-), and Xi;(+)pi(+) invariant mass spectra proton-proton collisions at sqrt[s]=17.2 GeV are presented. Evidence is shown for existence a narrow Xi(-)pi(-) baryon with 1.862+/-0.002 GeV/c(2) width below detector resolution about 0.018 GeV/c(2). The significance estimated to be above 4.2sigma. This state candidate hypothetical exotic Xi(--)(3/2) S=-2, I=3 / 2, quark content (dsdsū). At same mass, peak observed Xi(-)pi(+)...
Net proton and negative hadron spectra for central \PbPb collisions at 158 GeV per nucleon the CERN SPS were measured compared to from lighter systems. baryon distributions derived those of net protons, utilizing model calculations isospin contributions as well data strange distributions. Stopping (rapidity shift with respect beam) mean transverse momentum \meanpt baryons increase system size. The rapidity density hadrons scales number participant nucleons nuclear collisions, whereas their...
We study the production of hadronic resonances and their interaction in partonic medium using EPOS3 model, which employs UrQMD model for description phase. investigate centrality dependence yields momentum distributions various (rho(770),K(892),phi(1020),Delta(1232),Sigma(1385),Lambda(1520),Xi(1530) antiparticles) Pb-Pb collisions at sNN= 2.76 TeV. The predictions K(892) phi(1020) will be compared with experimental data from ALICE collaboration. observed signal suppression increasing...
The directed and elliptic flow of protons charged pions has been observed from the semicentral collisions a 158 GeV/nucleon Pb beam with target. rapidity transverse momentum dependence measured. is opposite to that but both exhibit negative at low pt. fairly independent rises pt.Received 10 November 1997DOI:https://doi.org/10.1103/PhysRevLett.80.4136©1998 American Physical Society
The transverse mass ${m}_{t}$ distributions for deuterons and protons are measured in $\text{Pb}+\text{Pb}$ reactions near midrapidity the range $0<{m}_{t}\ensuremath{-}m<1.0\phantom{\rule{0.3em}{0ex}}(1.5)\phantom{\rule{0.3em}{0ex}}\text{GeV}∕{c}^{2}$ minimum bias collisions at $158A\phantom{\rule{0.3em}{0ex}}\text{GeV}$ central 40 $80\phantom{\rule{0.3em}{0ex}}A\phantom{\rule{0.3em}{0ex}}\text{GeV}$ beam energies. rapidity density $dn∕dy$, inverse slope parameter $T$ mean $⟨{m}_{t}⟩$...
Production of Lambda and Antilambda hyperons was measured in central Pb-Pb collisions at 40, 80, 158 A$\cdot$GeV beam energy on a fixed target. Transverse mass spectra rapidity distributions are given for all three energies. The $\Lambda/\pi$ ratio mid-rapidity full phase space shows pronounced maximum between the highest AGS 40 SPS energies, whereas $\bar{\Lambda}/\pi$ exhibits monotonic increase.
Results are presented on event-by-event fluctuations in transverse momentum of charged particles, produced at forward rapidities p+p, C+C, Si+Si and Pb+Pb collisions 158 AGeV. Three different characteristics discussed: the average event, Phi_pT fluctuation measure two-particle correlations. In kinematic region explored, dynamical found to be small. However, a significant system size dependence is observed, with largest value measured peripheral interactions. The data compared predictions...
We present the first measurement of fluctuations from event to in production strange particles collisions heavy nuclei. The ratio charged kaons pions is determined for individual central Pb+Pb collisions. After accounting due detector resolution and finite number statistics we derive an upper limit on genuine nonstatistical fluctuations, which could be related a first- or second-order QCD phase transition. Such are shown very small.
Emission of pi+/-, K+/-, phi, and Lambda was measured in near-central C+C Si+Si collisions at 158 AGeV beam energy. Together with earlier data for p+p, S+S, Pb+Pb, the system-size dependence relative strangeness production nucleus-nucleus is obtained. Its fast rise saturation observed about 60 participating nucleons can be understood as onset formation coherent systems increasing size.
Results are presented on Omega production in central Pb+Pb collisions at 40 and 158 AGeV beam energy. Given transverse-mass spectra, rapidity distributions, total yields for the sum Omega+Antiomega Antiomega separately AGeV. The strongly under-predicted by string-hadronic UrQMD model better agreement with predictions from a hadron gas models.
Results are presented on event-by-event electric charge fluctuations in central Pb+Pb collisions at 20, 30, 40, 80 and 158 AGeV. The observed close to those expected for a gas of pions correlated by global conservation only. These considerably larger than calculated an ideal deconfined quarks gluons. present measurements do not necessarily exclude reduced from quark-gluon plasma because these might be masked contributions resonance decays.
Hadronic resonances can play a pivotal role in providing experimental evidence for partial chiral symmetry restoration the deconfined quark-gluon phase produced at RHIC. Their lifetimes, which are comparable to lifetime of partonic plasma phase, make them an invaluable tool study medium modifications resonant state due transition. In this paper we show that heavier, but still abundant, light and strange quark K*, phi, Delta Lambda* have large probability be well within their short formation...
We study the strange vector meson (${K}^{*},{\overline{K}}^{*}$) dynamics in relativistic heavy-ion collisions based on microscopic parton-hadron-string (PHSD) transport approach which incorporates partonic and hadronic degrees of freedom, a phase transition from to matter---quark-gluon-plasma (QGP)---and dynamical hadronization quarks antiquarks as well final interactions. investigate role in-medium effects ${K}^{*},\phantom{\rule{4pt}{0ex}}{\overline{K}}^{*}$ by employing Breit--Wigner...
We investigate the possibility of probing hot and dense nuclear matter---created in relativistic heavy-ion collisions (HICs)---with strange vector mesons (${K}^{*},{\overline{K}}^{*}$). Our analysis is based on nonequilibrium parton-hadron-string dynamics (PHSD) transport approach which incorporates partonic hadronic degrees freedom describes full HIC a microscopic level---starting from primary nucleon-nucleon to formation strongly interacting quark gluon plasma (QGP), followed by dynamical...
New results from the energy scan programme of NA49, in particular kaon production at 30 AGeV and phi 40 80 are presented. The K+/pi+ ratio shows a pronounced maximum AGeV; slope parameters constant SPS energies. Both findings support scenario phase transition about beam energy. phi/pi increases smoothly with energy, showing an dependence similar to K-/pi-. measured particle yields can be reproduced by hadron gas model, chemical freeze-out on smooth curve T-muB plane. transverse spectra...
We report measurements of Ξ− and Ξ+ hyperon absolute yields as a function rapidity in 158 GeV/c Pb+Pb collisions. At midrapidity, dN/dy=2.29±0.12 for Ξ−, 0.52±0.05 Ξ+, leading to the ratio Ξ+/Ξ−=0.23±0.03. Inverse slope parameters fitted measured transverse mass spectra are order T≈300 MeV near mid-rapidity. The estimated total yield particles central interactions amounts 7.4±1.0 per collision. Comparison production properly scaled p+p reactions at same energy reveals dramatic enhancement...