A5035830300- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Markov Chains and Monte Carlo Methods
- Stochastic processes and statistical mechanics
- Distributed and Parallel Computing Systems
- Soil and Unsaturated Flow
- Quantum, superfluid, helium dynamics
- Asphalt Pavement Performance Evaluation
- Geotechnical Engineering and Underground Structures
- Advanced Data Storage Technologies
- Transport and Logistics Innovations
- Scientific Computing and Data Management
- Particle Detector Development and Performance
Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie
2022-2024
Chang'an University
2024
Stony Brook University
2014-2023
Banaras Hindu University
2018-2023
Augustana University
2018-2023
Kurchatov Institute
2023
PHENIX laboratory
2023
Bhabha Atomic Research Centre
2018-2023
Abilene Christian University
2018
Jeonbuk National University
2018
We present measurements of the elliptic flow (v2) as a function transverse momentum (pT), pseudorapidity (η), and centrality in d+Au collisions at sNN=200, 62.4, 39, 19.6 GeV. The beam-energy scan provides testing ground for onset signatures small collision systems. measure nonzero v2 signal all four energies, which, midrapidity low pT, is consistent with predictions from viscous hydrodynamic models. Comparisons calculations parton transport models (based on ampt Monte Carlo generator) show...
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...
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...
We present a measurement of the transverse single-spin asymmetry for $\pi^0$ and $\eta$ mesons in $p^\uparrow$$+$$p$ collisions pseudorapidity range $|\eta|<0.35$ at center-of-mass energy 200 GeV with PHENIX detector Relativistic Heavy Ion Collider. In comparison previous measurements this kinematic region, these results have factor 3 smaller uncertainties. As hadrons, are sensitive to both initial- final-state nonperturbative effects mix parton flavors. Comparisons differences their...
Studying spin-momentum correlations in hadronic collisions offers a glimpse into three-dimensional picture of proton structure. The transverse single-spin asymmetry for midrapidity isolated direct photons $p^\uparrow+p$ at $\sqrt{s}=200$ GeV is measured with the PHENIX detector Relativistic Heavy Ion Collider (RHIC). Because particular are produced from hard scattering and do not interact via strong force, this measurement clean probe initial-state inside sensitive to gluon interference...
The morphology of graded crushed stone (GCS) particles has an essential influence on the performance aggregate mixtures. impact particle shape is a comprehensive effect that cannot be considered separately, leading to difficulties in establishing relationship between mixture properties and by using laboratory methods. discrete element method (DEM) effective way widely adopted reconstruct simulate tests granular materials. However, selecting limited characterizing real particle-assembly for...
Polarized proton-proton collisions provide leading-order access to gluons, presenting an opportunity constrain gluon spin-momentum correlations within transversely polarized protons and enhance our understanding of the three-dimensional structure proton. Midrapidity open-heavy-flavor production at $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$ is dominated by gluon-gluon fusion, providing heightened sensitivity dynamics relative other channels. Transverse single-spin asymmetries positrons...
We report the first measurement of fraction $J/\ensuremath{\psi}$ mesons coming from $B$-meson decay (${F}_{B\ensuremath{\rightarrow}J/\ensuremath{\psi}}$) in $p+p$ collisions at $\sqrt{s}=510\text{ }\text{ }\mathrm{GeV}$. The is performed using forward silicon vertex detector and central PHENIX, which provide precise tracking distance-of-closest-approach determinations, enabling statistical separation due to decays prompt $J/\ensuremath{\psi}$. measured value...
Reported here are transverse single-spin asymmetries (AN) in the production of charged hadrons as a function momentum (pT) and Feynman-x (xF) polarized p↑+p, p↑+Al, p↑+Au collisions at √sNN=200 GeV. The measurements have been performed forward backward rapidity (1.4<|η|<2.4) over range 1.5 GeV/c<pT<7.0 GeV/c 0.04<|xF|<0.2. A nonzero asymmetry is observed for positively (xF>0) p↑+p collisions, whereas p↑+Al results show smaller asymmetries. This finding provides new opportunities to...
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured differential cross section, mean transverse momentum, momentum squared of inclusive $J/\psi$ and cross-section ratio $\psi(2S)$ to forward rapidity in \pp collisions \sqrts = 510 GeV via dimuon decay channel. Comparison is made sections 200 2.76--13 TeV. result also compared leading-order nonrelativistic QCD calculations coupled a color-glass-condensate description low-$x$ gluons proton low ($p_T$) next-to-leading...
The invariant yields for $J/\psi$ production at forward rapidity $(1.2<|y|<2.2)$ in U$+$U collisions $\sqrt{s_{_{NN}}}$=193 GeV have been measured as a function of collision centrality. and nuclear-modification factor $R_{AA}$ are presented compared with those from Au$+$Au the same range. Additionally, direct ratio within centrality class is presented, used to investigate role $c\bar{c}$ coalescence. Two different parameterizations deformed Woods-Saxon distribution were Glauber calculations...
In 2015 the PHENIX collaboration at Relativistic Heavy Ion Collider recorded $p+p$, $p+\mathrm{Al}$, and $p+\mathrm{Au}$ collision data center of mass energies $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$ with proton beam(s) transversely polarized. At very forward rapidities $\ensuremath{\eta}>6.8$ relative to polarized beam, neutrons were detected either inclusively or in (anti)correlation detector activity related hard collisions. The resulting single spin asymmetries, that...
In 2015, the PHENIX collaboration has measured very forward ($\ensuremath{\eta}>6.8$) single spin asymmetries of inclusive neutrons in transversely polarized proton-proton and proton-nucleus collisions at a center mass energy 200 GeV. A previous publication from this dataset concentrated on nuclear dependence such asymmetries. measurement explicit transverse momentum neutron for is extracted using bootstrapping unfolding technique momenta. This will help improve understanding mechanisms that...
PHENIX has measured the azimuthal correlations of muon pairs from charm and bottom semi-leptonic decays in $p$+$p$ collisions at $\sqrt{s}=200$ GeV, using a novel analysis technique utilizing both unlike- like-sign to separate charm, Drell-Yan contributions. The dimuon measurements combined with previous electron-muon dielectron span wide range rapidity, are well described by PYTHIA Tune A. Through Bayesian based on A, we show that leading order pair creation is dominant...
The PHENIX experiment has measured the spin alignment for inclusive $J/\ensuremath{\psi}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}$ decays in proton-proton collisions at $\sqrt{s}=510\text{ }\text{ }\mathrm{GeV}$ midrapidity. angular distributions have been three different polarization frames, and decay coefficients extracted a full two-dimensional analysis. Previously, saw large longitudinal net forward rapidity same collision energy. This analysis midrapidity, complementary to...
Reported here are transverse single-spin asymmetries ($A_{N}$) in the production of charged hadrons as a function momentum ($p_T$) and Feynman-$x$ ($x_F$) polarized $p^{\uparrow}$+$p$, $p^{\uparrow}$+Al, $p^{\uparrow}$+Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. The measurements have been performed forward backward rapidity ($1.4<|\eta|<2.4$) over range $1.5<p_{T}<7.0~{\rm GeV}/c$ $0.04<|x_{F}|<0.2$. A nonzero asymmetry is observed for positively ($x_F>0$) $p^{\uparrow}$+$p$ collisions,...
The cross section of bottom quark-antiquark ($b\bar{b}$) production in $p$+$p$ collisions at $\sqrt{s}=510$ GeV is measured with the PHENIX detector Relativistic Heavy Ion Collider. results are based on yield high mass, like-sign muon pairs within arm acceptance ($1.2<|y|<2.2$). $b\bar{b}$ signal extracted from dimuons by utilizing unique properties neutral $B$ meson oscillation. We report a differential $d\sigma_{b\bar{b}\rightarrow \mu^\pm\mu^\pm}/dy = 0.16 \pm 0.01~(\mbox{stat})...
In 2015 the PHENIX collaboration at Relativistic Heavy Ion Collider recorded $p$$+$$p$, $p$$+$Al, and $p$$+$Au collision data center of mass energies $\sqrt{s_{_{NN}}}=200$ GeV with proton beam(s) transversely polarized. At very forward rapidities $η>6.8$ relative to polarized beam, neutrons were detected either inclusively or in (anti)correlation detector activity related hard collisions. The resulting single spin asymmetries, that previously reported, have now been extracted as a...