A5040040864- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Topic Modeling
- Stochastic processes and statistical mechanics
- Natural Language Processing Techniques
- Wireless Power Transfer Systems
- Advanced Differential Equations and Dynamical Systems
- Hydrological Forecasting Using AI
- Water Quality Monitoring and Analysis
- Scientific Computing and Data Management
- Inorganic Chemistry and Materials
- Solid-state spectroscopy and crystallography
- Simulation Techniques and Applications
- Stellar, planetary, and galactic studies
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Optical properties and cooling technologies in crystalline materials
- Pediatric Urology and Nephrology Studies
- Theoretical and Computational Physics
- Speech and dialogue systems
- Advanced Data Storage Technologies
- Semiconductor Quantum Structures and Devices
Purdue University West Lafayette
2025
Iowa State University
2012-2024
Guizhou Minzu University
2024
Guizhou University
2024
Zhejiang Gongshang University
2024
Augustana University
2023
PHENIX laboratory
2023
Banaras Hindu University
2023
Abilene Christian University
2023
Bhabha Atomic Research Centre
2023
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 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 $0.4
We report the measurement of cumulants ($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...
We present measurements of ${e}^{+}{e}^{\ensuremath{-}}$ production at midrapidity in $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{{}_{NN}}}=200$ GeV. The invariant yield is studied within the PHENIX detector acceptance over a wide range mass (${m}_{ee}<5 \mathrm{GeV}/{c}^{2}$) and pair transverse momentum (${p}_{T}<5 \mathrm{GeV}/c$) for minimum bias five centrality classes. compared to expectations from known sources. In low-mass region (${m}_{ee}=0.30--0.76 there an enhancement that...
Measurements of bottomonium production in heavy ion and $p$$+$$p$ collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield three $\Upsilon$ states, $\Upsilon(1S+2S+3S)$, was measured PHENIX experiment via electron-positron decay pairs midrapidity for Au$+$Au $\sqrt{s_{_{NN}}}=200$ GeV. $\Upsilon(1S+2S+3S)\rightarrow e^+e^-$ differential cross section found to be $B_{\rm ee} d\sigma/dy =$ 108 $\pm$ 38 (stat) 15(syst) 11 (luminosity) pb collisions. nuclear...
PHENIX measurements are presented for the cross section and double-helicity asymmetry (${A}_{LL}$) in inclusive ${\ensuremath{\pi}}^{0}$ production at midrapidity from $p+p$ collisions $\sqrt{s}=510\text{ }\text{ }\mathrm{GeV}$ data taken 2012 2013 Relativistic Heavy Ion Collider. The next-to-leading-order perturbative-quantum-chromodynamics theory calculation is excellent agreement with results. utilized parton-to-pion fragmentation functions recent DSS14 global analysis, which prefer a...
Neutral-pion π(0) spectra were measured at midrapidity (|y|<0.35) in Au+Au collisions √(s(NN))=39 and 62.4 GeV compared with earlier measurements 200 a transverse-momentum range of 1<p(T)<10 GeV/c. The high-p(T) tail is well described by power law all cases, the powers decrease significantly decreasing center-of-mass energy. change very similar to that observed corresponding for p+p collisions. nuclear modification factors (R(AA)) show significant suppression, distinct energy, centrality,...
The PHENIX Collaboration at the Relativistic Heavy Ion Collider has measured open heavy-flavor production in minimum bias Au$+$Au collisions $\sqrt{s_{_{NN}}}=200$ GeV via yields of electrons from semileptonic decays charm and bottom hadrons. Previous electron measurements indicated substantial modification momentum distribution parent heavy quarks due to quark-gluon plasma created these collisions. For first time, using silicon vertex detector measure precision displaced tracking, relative...
We present a detailed measurement of charged two-pion correlation functions in 0--30% centrality $\sqrt{{s}_{{}_{\mathit{NN}}}}=200$ GeV $\mathrm{Au}+\mathrm{Au}$ collisions by the PHENIX experiment at Relativistic Heavy Ion Collider. The data are well described Bose-Einstein stemming from L\'evy-stable source distributions. Using fine transverse momentum binning, we extract strength parameter $\ensuremath{\lambda}$, L\'evy index stability $\ensuremath{\alpha}$, and length scale $R$ as...
The PHENIX experiment has performed a systematic study of identified charged-hadron $({\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}},$ ${K}^{\ifmmode\pm\else\textpm\fi{}},$ $p,$ $\overline{p})$ production at midrapidity in $p+\mathrm{Al}$, $^{3}\mathrm{He}+\mathrm{Au}$, and $\mathrm{Cu}+\mathrm{Au}$ collisions $\sqrt{{s}_{{}_{NN}}}=200\phantom{\rule{0.16em}{0ex}}\mathrm{GeV}$ $\mathrm{U}+\mathrm{U}$ $\sqrt{{s}_{{}_{NN}}}=193\phantom{\rule{0.16em}{0ex}}\mathrm{GeV}$. Identified invariant...
We present a measurement of the cross section and transverse single-spin asymmetry ($A_N$) for $\eta$ mesons at large pseudorapidity from $\sqrt{s}=200$~GeV $p^{\uparrow}+p$ collisions. The measured $0.5<p_T<5.0$~GeV/$c$ $3.0<|\eta|<3.8$ is well described by next-to-leading-order perturbative-quantum-chromodynamics calculation. asymmetries $A_N$ have been as function Feynman-$x$ ($x_F$) $0.2<|x_{F}|<0.7$, momentum ($p_T$) $1.0<p_T<4.5$~GeV/$c$. averaged over positive $x_F$...
Measurements of anisotropic flow Fourier coefficients (${v}_{n}$) for inclusive charged particles and identified hadrons ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}, {K}^{\ifmmode\pm\else\textpm\fi{}}, p$, $\overline{p}$ produced at midrapidity in $\mathrm{Cu}+\mathrm{Au}$ collisions $\sqrt{{s}_{{}_{\mathit{NN}}}}=200$ GeV are presented. The data were collected 2012 by the PHENIX experiment Relativistic Heavy-Ion Collider (RHIC). particle azimuthal distributions with respect to...
The PHENIX experiment reports systematic measurements at the Relativistic Heavy Ion Collider of ϕ-meson production in asymmetric Cu+Au collisions sNN=200GeV and U+U sNN=193GeV. Measurements were performed via ϕ→K+K− decay channel midrapidity |η|<0.35. Features measured Cu+Cu, Cu+Au, Au+Au, found to not depend on collision geometry, which was expected because yields are averaged over azimuthal angle follow scaling with nuclear-overlap size. elliptic flow ϕ meson scales...
The measurement of direct photons from Au+Au collisions at √sNN=39 and 62.4 GeV in the transverse-momentum range 0.4<pT<3Gev/c is presented by PHENIX collaboration BNLRelativistic Heavy Ion Collider. A significant direct-photon yield observed both collision systems. universal scaling when pT spectra for different center-of-mass energies centrality selections √sNN=62.4 scaled with (dNch/dη)α α=1.21±0.04. This also holds true √sNN=200 measured earlier PHENIX, as well Pb+Pb √sNN=2760 published...
We present measurements of the J/psi invariant yields in sqrt(s_NN)=39 and 62.4 GeV Au+Au collisions at forward rapidity (1.2<|y|<2.2). Invariant are presented as a function both collision centrality transverse momentum. Nuclear modifications obtained for central relative to peripheral (R_CP) various selections scaled p+p cross sections from other (R_AA). The observed suppression patterns 39 quite similar those previously measured 200 GeV. This presents challenge theoretical models that...
The cross section and transverse single-spin asymmetries of ${\ensuremath{\mu}}^{\ensuremath{-}}$ ${\ensuremath{\mu}}^{+}$ from open heavy-flavor decays in polarized $p+p$ collisions at $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$ were measured by the PHENIX experiment during 2012 Relativistic Heavy Ion Collider. Because production is dominated gluon-gluon interactions }\mathrm{GeV}$, these measurements offer a unique opportunity to obtain information on trigluon correlation functions. are...
We present measurements of electrons and positrons from the semileptonic decays heavy-flavor hadrons at midrapidity ($|y|<$ 0.35) in $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{NN}}=62.4$ GeV. The data were collected 2010 by PHENIX experiment that included new hadron-blind detector. invariant yield is measured as a function transverse momentum range $1<{p}_{T}^{e}<5$ GeV/$c$. per binary collision slightly enhanced above $p+p$ reference 0%--20%, 20%--40%, 40%--60% centralities comparable...
The dissolved oxygen concentration (DOC) is an important indicator of water quality. Accurate DOC predictions can provide a scientific basis for environment management and pollution prevention. This study proposes hybrid forecasting framework combined with Variational Mode Decomposition (VMD), convolutional neural network (CNN), Gated Recurrent Unit (GRU), the Beluga Whale Optimization (BWO) algorithm. Specifically, original sequences were decomposed using VMD. Then, CNN-GRU attention...
We report on $J/\ensuremath{\psi}$ production from asymmetric Cu + Au heavy-ion collisions at $\sqrt{{s}_{{}_{NN}}}=200$ GeV the Relativistic Heavy Ion Collider both forward (Cu-going direction) and backward (Au-going rapidities. The nuclear modification of yields in Au-going direction is found to be comparable that when plotted as a function number participating nucleons. In Cu-going direction, shows stronger suppression. This difference magnitude has same sign expected shadowing effects...
We have measured the cross section and single-spin asymmetries from forward ${W}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\nu}$ production in longitudinally polarized $p+p$ collisions at $\sqrt{s}=510\text{ }\text{ }\mathrm{GeV}$ using PHENIX detector Relativistic Heavy Ion Collider. The sections are consistent with previous measurements this collision energy, while most backward longitudinal single spin provide new...
Production of $π^0$ and $η$ mesons has been measured at midrapidity in Cu$+$Au collisions $\sqrt{s_{_{NN}}}$=200 GeV. Measurements were performed $π^0(η)\rightarrowγγ$ decay channel the 1(2)-20 GeV/$c$ transverse momentum range. A strong suppression is observed for meson production high central relative to $p$$+$$p$ results scaled by number nucleon-nucleon collisions. In similar Au$+$Au with comparable nuclear overlap. The $η/π^0$ ratio as a function consistent $m_T$-scaling parameterization...
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured longitudinal double spin asymmetries, $A_{LL}$, for charged pions midrapidity ($|η|<0.35$) in longitudinally polarized $p$$+$$p$ collisions $\sqrt{s}=510$ GeV. These measurements are sensitive to gluon contribution total of proton parton momentum fraction $x$ range between 0.04 and 0.09. One can infer sign polarization from ordering pion asymmetries with charge alone. found be consistent global...
The processes $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\gamma}{K}^{+}{K}^{\ensuremath{-}}$, and $\ensuremath{\gamma}p\overline{p}$ have been studied using a sample of $3.79\ifmmode\times\else\texttimes\fi{}{10}^{6}\ensuremath{\psi}(2S)$ decays. We determine the total width ${\ensuremath{\chi}}_{c0}$ to be...
Dihadron and isolated direct photon-hadron angular correlations are measured in $p+p$ collisions at $\sqrt{s}=510\text{ }\text{ }\mathrm{GeV}$. Correlations of charged hadrons $0.7<{p}_{T}<10\text{ }\mathrm{GeV}/c$ with ${\ensuremath{\pi}}^{0}$ mesons $4<{p}_{T}<15\text{ or photons $7<{p}_{T}<15\text{ used to study nonperturbative effects generated by initial-state partonic transverse momentum final-state from fragmentation. The behavior is characterized measuring the...