A5105929773- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Statistical Mechanics and Entropy
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Cosmology and Gravitation Theories
- Nuclear physics research studies
- Statistical Methods and Bayesian Inference
- Radiation Effects in Electronics
- Dark Matter and Cosmic Phenomena
- Stochastic processes and statistical mechanics
- Advanced Data Storage Technologies
- Complex Systems and Time Series Analysis
- Plasma Diagnostics and Applications
- Silicon Carbide Semiconductor Technologies
- Statistical Distribution Estimation and Applications
- Superconducting Materials and Applications
- Electron and X-Ray Spectroscopy Techniques
- Atomic and Subatomic Physics Research
- Mass Spectrometry Techniques and Applications
- Thyroid and Parathyroid Surgery
- CCD and CMOS Imaging Sensors
- Medical Device Sterilization and Disinfection
Banaras Hindu University
2016-2025
Stony Brook University
2016-2025
Bhabha Atomic Research Centre
2018-2024
Augustana University
2016-2024
State University of New York
2018-2024
Abilene Christian University
2018-2023
PHENIX laboratory
2013-2023
Charles University
2016-2023
Mathrusri Ramabai Ambedkar Dental College & Hospital
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2022
Recently, multiparticle-correlation measurements of relativistic $p/d/^{3}\mathrm{He}+\mathrm{Au}$, $p+\mathrm{Pb}$, and even $p+p$ collisions show surprising collective signatures. Here, we present beam-energy-scan two-, four-, six-particle angular correlations in $d+\mathrm{Au}$ at $\sqrt{{s}_{NN}}=200$, 62.4, 39, 19.6 GeV. We also two- four-particle $p+\mathrm{Au}$ $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$. find the cumulant to be real valued for all four energies. that has...
The experimental data from the RHIC and LHC experiments of invariant <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:msub><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi>T</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> spectra for most peripheral id="M2"><mml:mi>A</mml:mi><mml:mo>+</mml:mo><mml:mi>A</mml:mi></mml:math> id="M3"><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>p</mml:mi></mml:math> collisions are analyzed with Tsallis distributions in...
We present the first measurements of long-range angular correlations and transverse momentum dependence elliptic flow $v_2$ in high-multiplicity $p$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. A comparison these results with previous $d$$+$Au $^3{\rm He}$$+$Au demonstrates a relation between initial collision eccentricity $\varepsilon_2$, suggesting that observed momentum-space azimuthal anisotropies small systems have collective origin reflect geometry. Good agreement is measured...
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...
Asymmetric nuclear collisions of $p+\mathrm{Al}$, $p+\mathrm{Au}$, $d+\mathrm{Au}$, and $^{3}\mathrm{He}+\mathrm{Au}$ at $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$ provide an excellent laboratory for understanding particle production, as well exploring interactions among these particles after their initial creation in the collision. We present measurements charged hadron production $d{N}_{\text{ch}}/d\ensuremath{\eta}$ all such collision systems over a broad pseudorapidity range...
PHENIX presents a simultaneous measurement of the production direct γ and π0 in d+Au collisions at sNN=200 GeV over pT range 7.5 to 18 GeV/c for different event samples selected by activity, i.e., charged-particle multiplicity detected forward rapidity. Direct-photon yields are used empirically estimate contribution hard-scattering processes samples. Using this estimate, average nuclear-modification factor, RdAu,EXPπ0, is 0.925±0.023(stat)±0.15(scale), consistent with unity minimum-bias (MB)...
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...
PHENIX reports differential cross sections of $\mu\mu$ pairs from semileptonic heavy-flavor decays and the Drell-Yan production mechanism measured in $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV forward backward rapidity ($1.2<|\eta|<2.2$). The $c\bar{c}$, $b\bar{b}$, are separated using a template fit to unlike- like-sign muon pair spectra mass $p_T$. azimuthal opening angle correlation between muons $c\bar{c}$ $b\bar{b}$ pair-$p_T$ distributions compared generated {\sc pythia} powheg}...
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 Collaboration has measured the ratio of yields $\ensuremath{\psi}(2S)$ to $\ensuremath{\psi}(1S)$ mesons produced in $p+p$, $p+\mathrm{Al}$, $p+\mathrm{Au}$, and $^{3}\mathrm{He}+\mathrm{Au}$ collisions at $\sqrt{{s}_{{}_{\mathit{NN}}}}=200$ GeV over forward backward rapidity intervals $1.2<|y|<2.2$. We find that $p+p$ is consistent with measurements other collision energies. In nuclei, we ($p$-going or $^{3}\mathrm{He}$-going) direction, relative yield value collisions. However,...
Abstract The PICOSEC Micromegas (MM) detector is a precise timing gaseous consisting of Cherenkov radiator combined with photocathode and MM amplifying structure. A 100-channel prototype 10 × cm 2 active area equipped Cesium Iodide (CsI) demonstrated time resolution below σ = 18 ps. objective this work to improve the robustness aspects, i.e. integration resistive carbon-based photocathodes, while maintaining good resolution. prototypes have been tested in laboratory conditions successfully...
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...
We present measurements of the transverse-momentum dependence elliptic flow ${v}_{2}$ for identified pions and (anti)protons at midrapidity ($|\ensuremath{\eta}|<0.35$), in 0%--5% central $p+\mathrm{Au}$ $^{3}\mathrm{He}+\mathrm{Au}$ collisions $\sqrt{{s}_{{}_{NN}}}=200$ GeV. When taken together with previously published $d+\mathrm{Au}$ GeV, results cover a broad range small-collision-system multiplicities intrinsic initial geometries. observe clear mass-dependent splitting...
The evolution equation for inhomogeneous and anisotropic temperature fluctuation inside a medium is derived within the ambit of Boltzmann Transport Equation (BTE) hot gas massless particles. Also, specializing to situation created after heavy-ion collision (HIC), we analyze Fourier space variation using its profile. effect viscosity on fluctuations in latter case investigated possible implications early universe cosmology, connection with HICs are also explored.
There is strong evidence for the formation of small droplets quark-gluon plasma in $p/d/^{3}\mathrm{He}+\mathrm{Au}$ collisions at Relativistic Heavy Ion Collider (RHIC) and $p+p/\mathrm{Pb}$ Large Hadron Collider. In particular, analysis data RHIC different geometries obtained by varying projectile size shape has proved insightful. present analysis, we find excellent agreement with previously published PHENIX results on elliptical triangular flow an independent via two-particle correlation...
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 study the effect of charged secondaries coming from resonance decay on net-baryon, net-charge, and net-strangeness fluctuations in high-energy heavy-ion collisions within hadron gas (HRG) model. emphasize importance including weak decays along with other HRG, while comparing experimental observables. The kinematic cuts resonances primordial particles conserved number are also studied. HRG model calculations inclusion kinematical compared recent data STAR PHENIX experiments. find good...
In relativistic heavy-ion collisions, the analysis of charmonium yields normalized to those in $p\phantom{\rule{0}{0ex}}p$ collisions has been shown reveal final-state interactions occurring hot and dense strongly interacting matter created such events. However, until recently, similar analyses measured smaller collision systems---$p\phantom{\rule{0}{0ex}}A$ versus $p\phantom{\rule{0}{0ex}}p$---were performed terms cold nuclear effects. The measurements reported by PHENIX Collaboration...
Recently, the PHENIX Collaboration has published second- and third-harmonic Fourier coefficients $v_2$ $v_3$ for midrapidity ($|\eta|<0.35$) charged hadrons in 0\%--5\% central $p$$+$Au, $d$$+$Au, $^3$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV utilizing three sets of two-particle correlations two detector combinations with different pseudorapidity acceptance [Phys. Rev. C {\bf 105}, 024901 (2022)]. This paper extends these measurements to all centralities collisions, as well $p$$+$$p$...
The measurement of the direct-photon spectrum from $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{{}_{NN}}}=200$ GeV is presented by PHENIX Collaboration using external-photon-conversion technique for 0%--93% central in a transverse-momentum (${p}_{T}$) range 0.8--10 $\text{GeV}/c$. An excess direct photons, above prompt-photon production hard-scattering processes, observed ${p}_{T}<6\phantom{\rule{4pt}{0ex}}\text{GeV}/c$. Nonprompt photons are measured subtracting prompt component,...