A5046240226- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Nuclear reactor physics and engineering
- Stochastic processes and statistical mechanics
- Theoretical and Computational Physics
- Cosmology and Gravitation Theories
- Statistical Mechanics and Entropy
- Nuclear Physics and Applications
- Synthesis and biological activity
- Quantum, superfluid, helium dynamics
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Nuclear Materials and Properties
- Microbial Natural Products and Biosynthesis
- Astronomical and nuclear sciences
- Particle Detector Development and Performance
- X-ray Spectroscopy and Fluorescence Analysis
- Synthesis of heterocyclic compounds
- Phenothiazines and Benzothiazines Synthesis and Activities
- X-ray Diffraction in Crystallography
- Markov Chains and Monte Carlo Methods
- Radiation Detection and Scintillator Technologies
- Numerical methods in inverse problems
Purdue University West Lafayette
2014-2025
Cadila Healthcare (India)
2004-2025
Ball State University
2023
Argonne National Laboratory
2023
Joint Institute for Nuclear Research
2005
Iowa State University
2003
Central Drug Research Institute
1996
Indian Institute of Technology Kharagpur
1968-1976
Indian Institute of Technology Kanpur
1974
University of Allahabad
1969
Using reverse kinematics, we have studied the breakup of $1.0A$ GeV gold nuclei incident on a carbon target. The detector system permitted exclusive event reconstruction nearly all charged reaction products. moments resulting fragment distribution provide strong evidence that nuclear matter possesses critical point observable in finite nuclei. We determined values for exponents $\ensuremath{\gamma}$, $\ensuremath{\beta}$, and $\ensuremath{\tau}$. These are close to those liquid-gas systems...
An exclusive study of the interaction 1A GeV Au with C shows a separability into two stages: prompt stage involving emission most $Z\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1$ and some $Z\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}2$ particles second decay an equilibrated remnant, which typically undergoes multifragmentation. The mean mass, charge, excitation energy, initial temperature ${T}_{i}$ remnant have been determined as function total charge multiplicity, $m$, has...
GPR40/FFA1 receptor, predominantly expressed in pancreatic β-cells, mediates glucose-stimulated insulin secretion by free fatty acids. Fasiglifam-GPR40 agonist was terminated phase III clinical trials due to adverse liver effects. ZYDG2 is identified as a novel, potent and selective for GPR40, exhibiting EC50 of 41 nM 17 cell-based functional inositol 1-phosphate-ELISA assay Ca2+ mobilization assay, respectively. has demonstrated dose-dependent improvement glucose tolerance tests increased...
Multifragmentation MF results from 1AGeV Au on C have been compared with the Copenhagen statistical multifragmentation model (SMM). The complete charge, mass, and momentum reconstruction of projectile was used to identify high ejectiles leaving an excited remnant mass A, charge Z, excitation energy E* which subsequently multifragments. Measurement magnitude multiplicity (energy) dependence initial free volume breakup determines variable parametrization SMM. Very good agreement is obtained...
A systematic study of energy spectra for light particles emitted at midrapidity from Au+Au collisions E= (0.25–1.15) GeV reveals a significant nonthermal component consistent with collective radial flow. This is evaluated as function bombarding and event centrality. Comparisons to quantum molecular dynamics Boltzmann-Uehling-Uhlenbeck models are made different equations state.Received 15 August 1994DOI:https://doi.org/10.1103/PhysRevLett.75.2662©1995 American Physical Society
It is shown that de-confinement can be achieved in high multiplicity nonjet [Formula: see text] collisions at text][Formula: text]TeV Fermi National Accelerator Laboratory (FNAL- E735) experiment. Previously, the evidence for was demonstrated by constant freeze out energy density events. In this paper, we use same but analyze transverse momentum spectrum framework of clustering color sources. This frame work naturally predicts reduction charged particle with respect to value expected from...
Recently, the CMS Collaboration has published identified particle transverse momentum spectra in high multiplicity events at LHC energies $\sqrt s $ = 0.9-13 TeV. In present work have been analyzed framework of color fields inside clusters overlapping strings, which are produced energy hadronic collisions. The non-Abelian nature is reflected coherence sum as a consequence gives rise to an enhancement and suppression multiplicities relative non strings. initial temperature shear viscosity...
A high-statistics exclusive study of the multifragmentation 1A GeV gold on carbon has been performed. Particles with Z<~2 show evidence emission in a first prompt stage as well second equilibrium whereas fragments Z>~3 appear to be emitted essentially only stage. Two methods for separation particles into two stages are given and they agreement. The yields each determined function event charged particle multiplicity m. mass, nuclear charge, excitation energy per nucleon, temperature remnant...
The applicability of Bohr's stopping-power formula for range and calculations has been investigated by a detailed analysis the available data fission products in various solid media (Be, C, Al, Si, Cu, Zr, W, Au, U). In case heavy ($Z\ensuremath{\ge}45.5$), result is agreement with Thomas-Fermi statistical approach obtaining effective quantum number outer orbital electrons also original estimate charge fast-moving ion. light media, an empirical function...
The Color String Percolation Model (CSPM) is used to determine the shear viscosity entropy ratio ($\eta/s$) of Quark-Gluon Plasma (QGP) produced in Au-Au collisions at $\sqrt{s_{NN}}$ = 200 GeV RHIC and Pb-Pb 2.76 TeV LHC. relativistic kinetic theory relation for $\eta/s$ evaluated using CSPM values temperature mean free path QGP constituents. experimental charged hadron transverse momentum spectrum percolation density parameter $\xi$ (STAR). For are obtained from extrapolation energy. value...
The yield for the multistrange Xi(-) hyperon has been measured in 6A GeV Au+Au collisions via reconstruction of its decay products pi(-) and Lambda, latter also being reconstructed from daughter tracks p. measurement is rather close to threshold production therefore provides an important test model predictions. Lambda are compared several centralities. In central found be excellent agreement with statistical transport predictions, suggesting that hadron approaches chemical equilibrium high...
The fragment yields from the multifragmentation of gold, lanthanum, and krypton nuclei obtained by EOS Collaboration are examined in terms Fisher’s droplet formalism modified to account for Coulomb energy. critical exponents σ τ surface energy coefficient c0 obtained. Estimates made pressure-temperature temperature-density coexistence curve finite neutral nuclear matter as well location point.Received 7 May 2002DOI:https://doi.org/10.1103/PhysRevC.67.024609©2003 American Physical Society
The Color String Percolation Model (CSPM) is used to determine the equation of state (EOS) QGP produced in central Au-Au collisions at $\sqrt{s_{NN}}$ = 200 A GeV using STAR data RHIC. When initial density interacting colored strings exceeds 2D percolation threshold a cluster formed, which defines onset color deconfinement. These interactions also produce fluctuations string tension transforms Schwinger particle (gluon) production mechanism into maximum entropy thermal distribution. single...
The cluster distributions of different systems are examined to search for signatures a continuous phase transition. In system known possess such transition, both sensitive and insensitive present; while in not only present. It is shown that nuclear multifragmentation results belonging the former category, suggesting fragments result
Multifragmentation in fully reconstructed events from 1A GeV Kr and La collisions with C has been studied. Results are compared similar data for Au+C. The emitted charged particles fragments identified emission either a prompt first stage or second which the remnant resulting breaks up. nuclear charge, mass, excitation energy distributions of determined. total multiplicity, as well those stages obtained. Freeze-out temperatures thermal permit determination caloric curve. fragment charge...
Using charged-particle-exclusive measurements of Au+Au collisions in the LBL Bevalac's EOS time projection chamber, we investigate momentum-space densities fragments up to 4He as a function fragment transverse momentum, azimuth relative reaction plane, rapidity, multiplicity, and beam energy. Most features these above momentum threshold are consistent with coalescence, and, particular, increase sideward flow mass is generally well described by power law.Received 29 August...
Invariant mass analyses of (p,π±) pairs in 58Ni+Cu collisions at 1.97AGeV have been performed and show correlations resulting from the decays Δ resonance, Λ baryon, possibly N*(1440) resonance. A reduction is observed increases with collision centrality. Events generated by relativistic cascade model (ARC) also reveal a reduction. The related to size reaction volume details production mechanisms heavy ion collisions.Received 9 September...
A systematic analysis of multifragmentation (MF) in fully reconstructed events from $1A\mathrm{GeV}$ Au, La, and Kr collisions with C has been performed. These data are used to provide a definitive test the variable volume version statistical model (SMM). single set SMM parameters directly determined by semi-empirical mass formula after adjustable inverse level density parameter ${\ensuremath{\epsilon}}_{0}$ is fragment distributions. The results for second stage multiplicity, size biggest...
It is shown that the Fisher droplet model, percolation, and nuclear multifragmentation share common features of reducibility (stochasticity in multiplicity distributions) thermal scaling (one-fragment production probabilities are Boltzmann factors). Barriers obtained, for cluster on percolation lattices, from factors show a power-law dependence size with an exponent 0.42+/-0.02. The EOS Collaboration Au data yield barriers 0.68+/-0.03. Values surface energy coefficient low density system...
Transverse flow has been studied as a function of impact parameter for pions and protons from the reaction 1.15AGeV 197Au+197Au. We observe an “antiflow” behavior both π+ π− in peripheral collisions.Received 29 July 1996DOI:https://doi.org/10.1103/PhysRevLett.78.4165©1997 American Physical Society
We have measured deconfined hadronic volumes, $4.4 < V 13.0$ fm$^{3}$, produced by a one dimensional (1D) expansion. These volumes are directly proportional to the charged particle pseudorapidity densities $6.75 dN_{c}/d\eta 20.2$. The hadronization temperature is $T = 179.5 \pm 5$ (syst) MeV. Using Bjorken's 1D model,the energy density $\epsilon_{F} 1.10 0.26$ (stat) GeV/fm$^{3}$ corresponding an excitation of $24.8 6.2$ quark-gluon degrees freedom.