A5090823856- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Stochastic processes and statistical mechanics
- Statistical Methods and Bayesian Inference
- CCD and CMOS Imaging Sensors
- Radiation Detection and Scintillator Technologies
- Pediatric Urology and Nephrology Studies
- Advanced Semiconductor Detectors and Materials
- Cosmology and Gravitation Theories
- Nuclear Physics and Applications
- Markov Chains and Monte Carlo Methods
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Gas Dynamics and Kinetic Theory
- Theoretical and Computational Physics
- Advanced Electrical Measurement Techniques
- Laser-induced spectroscopy and plasma
- Health and Wellbeing Research
- Muon and positron interactions and applications
- Pulsars and Gravitational Waves Research
Pusan National University
2023-2025
University of Bergen
2024
Inha University
2020-2024
A. Alikhanyan National Laboratory
2021-2024
University of Pavol Jozef Šafárik
2022-2024
New Mexico State University
2014-2023
Charles University
2020-2023
Bhabha Atomic Research Centre
2023
Augustana University
2023
PHENIX laboratory
2023
Flow coefficients v_n for n = 2, 3, 4, characterizing the anisotropic collective flow in Au+Au collisions at sqrt(s_NN) 200 GeV, are measured relative to event planes \Psi_n determined large rapidity. We report as a function of transverse momentum and collision centrality, study correlations among different order n. The well described by hydrodynamic models which employ Glauber Monte Carlo initial state geometry with fluctuations, providing additional constraining power on interplay between...
The PHENIX collaboration at the Relativistic Heavy Ion Collider (RHIC) reports measurements of azimuthal dihadron correlations near midrapidity in $d$$+$Au collisions $\sqrt{s_{_{NN}}}$=200 GeV. These complement recent analyses by experiments Large Hadron (LHC) involving central $p$$+$Pb $\sqrt{s_{_{NN}}}$=5.02 TeV, which have indicated strong anisotropic long-range angular distributions hadron pairs. origin these anisotropies is currently unknown. Various competing explanations include...
The second Fourier component ${v}_{2}$ of the azimuthal anisotropy with respect to reaction plane is measured for direct photons at midrapidity and transverse momentum (${p}_{T}$) $1--12\text{ }\text{ }\mathrm{GeV}/c$ in $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{NN}}=200\text{ }\mathrm{GeV}$. Previous measurements this quantity hadrons ${p}_{T}<6\text{ indicate that medium behaves like a nearly perfect fluid, while ${p}_{T}>6\text{ reduced interpreted terms path-length dependence...
Heavy quarkonia are observed to be suppressed in relativistic heavy-ion collisions relative their production $p+p$ scaled by the number of binary collisions. In order determine if this suppression is related color screening these states produced medium, one needs account for other nuclear modifications including those cold matter. paper, we present new measurements from PHENIX 2007 data set $J/\ensuremath{\psi}$ yields at forward rapidity ($1.2<|y|<2.2$) $\text{Au}+\text{Au}$...
We present azimuthal angular correlations between charged hadrons and energy deposited in calorimeter towers central d+Au minimum bias p+p collisions at √sNN=200 GeV. The hadron is measured midrapidity |η|<0.35, the large rapidity (−3.7<η<−3.1, Au-going direction). An enhanced near-side correlation across |Δη|>2.75 observed collisions. Using event plane method applied to distribution, we extract anisotropy strength v2 for inclusive up pT=4.5 GeV/c. also measurement of identified π±...
Direct photons produced in relativistic heavy-ion collisions allow access to the state of matter during collision, because they do not experience strong interaction and can escape from fireball without scattering. New data PHENIX experiment at RHIC show that as a function impact parameter yield direct increases much more rapidly than particle production, which provides new evidence for emission system when it was most hot dense.
The PHENIX experiment has measured the production of ${\ensuremath{\pi}}^{0}$s in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{\mathit{NN}}}$ $=$ 200 GeV. new data offer a fourfold increase recorded luminosity, providing higher precision and larger reach transverse momentum, ${p}_{T}$, to 20 GeV/$c$. ratio $\ensuremath{\eta}/{\ensuremath{\pi}}^{0}$ is $0.46\ifmmode\pm\else\textpm\fi{}0.01(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.05(\mathrm{syst})$, constant with ${p}_{T}$ collision...
The transverse momentum (${p}_{T}$) spectra and ratios of identified charged hadrons (${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, $\overline{p}$) produced in $\sqrt{{s}_{{}_{NN}}}=200$ GeV $\mathrm{Au}+\mathrm{Au}$ $d+\text{Au}$ collisions are reported five different centrality classes for each collision species. measurements pions protons up to ${p}_{T}=6$ GeV/$c$ (5 GeV/$c$), the kaons ${p}_{T}=4$ (3.5 GeV/$c$) ($d+\text{Au}$) collisions....
Back-to-back hadron pair yields in d+Au and p+p collisions at sqrt(s_NN)=200 GeV were measured with the PHENIX detector Relativistic Heavy Ion Collider. Rapidity separated pairs detected trigger pseudorapidity |eta|<0.35 associated forward rapidity (deuteron direction, 3.0<eta<3.8). Pairs also both hadrons rapidity; this case yield of back-to-back small impact parameters is observed to be suppressed by a factor 10 relative collisions. The kinematics these expected probe partons Au nucleus...
We present results for three charmonia states (${\ensuremath{\psi}}^{\ensuremath{'}}$, ${\ensuremath{\chi}}_{c}$, and $J/\ensuremath{\psi}$) in $d+\mathrm{Au}$ collisions at $|y|<0.35$ $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$. find that the modification of ${\ensuremath{\psi}}^{\ensuremath{'}}$ yield relative to $J/\ensuremath{\psi}$ scales approximately with charged particle multiplicity midrapidity across $p+A$, $d+\mathrm{Au}$, $A+A$ from Super Proton Synchrotron Relativistic...
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured 2nd and 3rd order Fourier coefficients of azimuthal distributions direct photons emitted midrapidity in Au$+$Au collisions $\sqrt{s_{_{NN}}}=200$ GeV for various collision centralities. Combining two different analysis techniques, results were obtained transverse momentum range $0.4
Measurements of midrapidity charged-particle multiplicity distributions, $d{N}_{\mathrm{ch}}/d\ensuremath{\eta}$, and transverse-energy $d{E}_{T}/d\ensuremath{\eta}$, are presented for a variety collision systems energies. Included distributions $\mathrm{Au}\phantom{\rule{0.16em}{0ex}}+\phantom{\rule{0.16em}{0ex}}\mathrm{Au}$ collisions at $\sqrt{{s}_{{}_{NN}}}=200$, 130, 62.4, 39, 27, 19.6, 14.5, 7.7 GeV, $\mathrm{Cu}\phantom{\rule{0.16em}{0ex}}+\phantom{\rule{0.16em}{0ex}}\mathrm{Cu}$...
We have measured the azimuthal anisotropy of pi0's for 1 < pT 18 GeV/c Au+Au collisions at sqrt s_NN = 200 GeV. The observed shows a gradual decrease in 3 7 - 10 GeV/c, but remains positive beyond GeV/c. magnitude this is under-predicted, up to least by current perturbative QCD (pQCD) energy-loss model calculations. An estimate increase expected from initial-geometry modification due gluon saturation effects and fluctuations insufficient account discrepancy. Calculations which implement path...
We present measurements of $J/\ensuremath{\psi}$ yields in $d+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$ recorded by the PHENIX experiment and compare them with $p+p$ same energy per nucleon-nucleon collision. The cover a large kinematic range rapidity ($\ensuremath{-}2.2<y<2.4$) high statistical precision are compared two theoretical models: one nuclear shadowing combined final state breakup coherent gluon saturation effects. In order to remove model...
Differential measurements of the elliptic (v_2) and hexadecapole (v_4) Fourier flow coefficients are reported for charged hadrons as a function transverse momentum (p_T) collision centrality or number participant nucleons (N_part) Au+Au collisions at sqrt(s_NN)=200 GeV. The v_{2,4} pseudorapidity |\eta|<=0.35 obtained with four separate reaction plane detectors positioned in range 1.0<|\eta|<3.9 show good agreement, indicating absence significant \eta-dependent nonflow perturbations. Sizable...
We report on charmonium measurements [$J/\ensuremath{\psi}$ (1S), ${\ensuremath{\psi}}^{\ensuremath{'}}$ (2S), and ${\ensuremath{\chi}}_{c}$ (1P)] in $p+p$ collisions at $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$. find that the fraction of $J/\ensuremath{\psi}$ coming from feed-down decay midrapidity region ($|y|<0.35$) is $9.6\ifmmode\pm\else\textpm\fi{}2.4%$ $32\ifmmode\pm\else\textpm\fi{}9%$, respectively. also present ${p}_{T}$ rapidity dependencies yield measured via dielectron dimuon...
The PHENIX experiment has measured electrons and positrons at midrapidity from the decays of hadrons containing charm bottom quarks produced in d+Au p+p collisions sqrt(s_NN)=200 GeV Relativistic Heavy Ion Collider, transverse-momentum range 0.85 < pT 8.5 GeV/c. In central collisions, nuclear modification factor R_dA 1.5 5 GeV/c displays evidence enhancement these electrons, relative to those shows that mass-dependent Cronin observed RHIC extends heavy-D-meson family. A comparison with...
High-energy proton- and deuteron-nucleus collisions provide an excellent tool for studying a wide array of physics effects, including modifications parton distribution functions in nuclei, gluon saturation, color neutralization hadronization nuclear environment, among others. All these effects are expected to have significant dependence on the size target impact parameter collision, also known as collision centrality. In this article, we detail method determining centrality classes p(d)+A...
We present measured $J/\ensuremath{\psi}$ production rates in $d+\text{Au}$ collisions at $\sqrt{{s}_{{}_{NN}}}=200$ GeV over broad ranges of transverse momentum (${p}_{T}=0$--14 GeV/$c$) and rapidity ($\ensuremath{-}2.2<y<2.2$). construct the nuclear-modification factor ${R}_{d\mathrm{Au}}$ for these kinematics as a function collision centrality (related to impact parameter $d+\mathrm{Au}$ collision). find that modification is largest with small parameters observe suppression...
We report the measurement of cumulants ($C_n, n=1\ldots4$) net-charge distributions measured within pseudorapidity ($|\eta|<0.35$) in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=7.7-200$ GeV with PHENIX experiment Relativistic Heavy Ion Collider. The ratios (e.g. $C_1/C_2$, $C_3/C_1$) distributions, which can be related to volume independent susceptibility ratios, are studied as a function centrality and energy. These quantities important understand quantum-chromodynamics phase diagram possible...
Measurements of the anisotropy parameter ${v}_{2}$ identified hadrons (pions, kaons, and protons) as a function centrality, transverse momentum ${p}_{T}$, kinetic energy KE${}_{T}$ at midrapidity ($|\ensuremath{\eta}|<0.35$) in Au + collisions $\sqrt{{s}_{NN}}=200$ GeV are presented. Pions protons up to ${p}_{T}=$ 6 GeV$/c$, kaons 4 by combining information from time-of-flight aerogel \ifmmode \check{C}\else \v{C}\fi{}erenkov detectors PHENIX Experiment. The scaling with number valence...
Jet production rates are measured in $p$$+$$p$ and $d$$+$Au collisions at $\sqrt{s_{NN}}$=200 GeV recorded 2008 with the PHENIX detector Relativistic Heavy Ion Collider. Jets reconstructed using $R=0.3$ anti-$k_{t}$ algorithm from energy deposits electromagnetic calorimeter charged tracks multi-wire proportional chambers, jet transverse momentum ($p_T$) spectra corrected for response. Spectra reported jets $12
Hard-scattered parton probes produced in collisions of large nuclei indicate partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements π0 trigger particles at transverse momenta pTt=4–12 GeV/c and associated charged hadrons (pTa=0.5–7 GeV/c) vs relative azimuthal angle Δϕ Au+Au p+p sNN=200 GeV. The distribution low pTa, whose shape has been interpreted as a medium effect, is modified for pTt<7 GeV/c. At higher pTt, data are consistent...