A5018155093- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Cold Atom Physics and Bose-Einstein Condensates
- Stochastic processes and statistical mechanics
- Solar and Space Plasma Dynamics
- Aerodynamics and Acoustics in Jet Flows
- Computational Fluid Dynamics and Aerodynamics
- Spacecraft Design and Technology
- Combustion and flame dynamics
- Particle Accelerators and Free-Electron Lasers
- Statistical Methods and Bayesian Inference
- Advanced X-ray and CT Imaging
- Cellular Automata and Applications
- Mineral Processing and Grinding
- Geochemistry and Geologic Mapping
- Chaos-based Image/Signal Encryption
- Advanced Data Storage Technologies
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2013-2024
A. Alikhanyan National Laboratory
2013-2021
Yale University
2009-2021
University of Turin
2007-2019
University of Bergen
2015-2016
University of Birmingham
2014
State Innovation Exchange
2014
Aligarh Muslim University
2014
Istituto Nazionale di Fisica Nucleare
2012-2014
AGH University of Krakow
2013
Identified charged-particle spectra of ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, and $\overline{p}$ at midrapidity ($|y|<0.1$) measured by the $\mathit{dE}/\mathit{dx}$ method in STAR (solenoidal tracker BNL Relativistic Heavy Ion Collider) time projection chamber are reported for $\mathit{pp}$ $d+\mathrm{Au}$ collisions $\sqrt{{s}_{\mathit{NN}}}=200$ GeV $\mathrm{Au}+\mathrm{Au}$ 62.4, 130, 200 GeV. Average transverse momenta, total...
Parity-odd domains, corresponding to nontrivial topological solutions of the QCD vacuum, might be created during relativistic heavy-ion collisions. These domains are predicted lead charge separation quarks along system's orbital momentum axis. We investigate a three-particle azimuthal correlator which is $\mathcal{P}$ even observable, but directly sensitive effect. report measurements charged hadrons near center-of-mass rapidity with this observable in $\mathrm{Au}+\mathrm{Au}$ and...
Parity ($\mathcal{P}$)-odd domains, corresponding to nontrivial topological solutions of the QCD vacuum, might be created during relativistic heavy-ion collisions. These domains are predicted lead charge separation quarks along orbital momentum system in noncentral To study this effect, we investigate a three-particle mixed-harmonics azimuthal correlator which is $\mathcal{P}$-even observable, but directly sensitive charge-separation effect. We report measurements observable using STAR...
We report the first measurements of kurtosis (\kappa), skewness (S) and variance (\sigma^2) net-proton multiplicity (N_p - N_pbar) distributions at midrapidity for Au+Au collisions \sqrt(s_NN) = 19.6, 62.4, 200 GeV corresponding to baryon chemical potentials (\mu_B) between 20 MeV. Our products \kappa \sigma^2 S \sigma, which can be related theoretical calculations sensitive number susceptibilities long range correlations, are constant as functions collision centrality. compare these with...
The STAR Collaboration at the Relativistic Heavy Ion Collider presents a systematic study of high-transverse-momentum charged-di-hadron correlations small azimuthal pair separation $\ensuremath{\Delta}\ensuremath{\phi}$ in $d+\mathrm{Au}$ and central $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{\mathit{NN}}}=200$ GeV. Significant correlated yield for pairs with large longitudinal $\ensuremath{\Delta}\ensuremath{\eta}$ is observed collisions, contrast to collisions. associated...
Nuclear collisions recreate conditions in the universe microseconds after Big Bang. Only a very small fraction of emitted fragments are light nuclei, but these states fundamental interest. We report observation antihypertritons - composed an antiproton, antineutron, and antilambda hyperon produced by colliding gold nuclei at high energy. Our analysis yields 70 +- 17 157 30 hypertritons. The measured hypertriton (antihypertriton) helium3 (antihelium3) similar, suggesting equilibrium...
We present the first measurements of identified hadron production, azimuthal anisotropy, and pion interferometry from $\mathrm{Au}+\mathrm{Au}$ collisions below nominal injection energy at BNL Relativistic Heavy-Ion Collider (RHIC) facility. The data were collected using large acceptance solenoidal tracker RHIC (STAR) detector $\sqrt{{s}_{\mathit{NN}}}=9.2$ GeV a test run collider in year 2008. Midrapidity results on multiplicity density $\mathit{dN}/\mathit{dy}$ rapidity $y$, average...
A systematic study is presented for centrality, transverse momentum (${p}_{T}$), and pseudorapidity ($\ensuremath{\eta}$) dependence of the inclusive charged hadron elliptic flow (${v}_{2}$) at midrapidity ($|\ensuremath{\eta}|<1.0$) in $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{NN}}=7.7$, 11.5, 19.6, 27, 39 GeV. The results obtained with different methods, including correlations event plane reconstructed a region separated by large gap four-particle cumulants (${v}_{2}{4}$), are to...
Measurements of the elliptic flow, ${v}_{2}$, identified hadrons (${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}_{s}^{0}$, $p$, $\overline{p}$, $\ensuremath{\phi}$, $\ensuremath{\Lambda}$, $\overline{\ensuremath{\Lambda}}$, ${\ensuremath{\Xi}}^{\ensuremath{-}}$, ${\overline{\ensuremath{\Xi}}}^{+}$, ${\ensuremath{\Omega}}^{\ensuremath{-}}$, ${\overline{\ensuremath{\Omega}}}^{+}$) in $\mathrm{Au}+\mathrm{Au}$ collisions at...
We report measurements of charmed-hadron $({D}^{0},{D}^{*})$ production cross sections at midrapidity in $p+p$ collisions a center-of-mass energy 200 GeV by the STAR experiment. Charmed hadrons were reconstructed via hadronic decays ${D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, ${D}^{*+}\ensuremath{\rightarrow}{D}^{0}{\ensuremath{\pi}}^{+}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+}$ and their charge conjugates,...
We report measurements of the third harmonic coefficient azimuthal anisotropy, ${v}_{3}$, known as triangular flow. The analysis is for charged particles in Au+Au collisions at $\sqrt{{s}_{\mathit{NN}}}=200$ GeV, based on data from STAR experiment BNL Relativistic Heavy Ion Collider. Two-particle correlations a function their pseudorapidity separation are fit with narrow and wide Gaussians. Measurements flow extracted Gaussian, two-particle cumulants gap, also event plane methods large gap...
We report new STAR measurements of mid-rapidity yields for the $\Lambda$, $\bar{\Lambda}$, $K^{0}_{S}$, $\Xi^{-}$, $\bar{\Xi}^{+}$, $\Omega^{-}$, $\bar{\Omega}^{+}$ particles in Cu+Cu collisions at \sNN{200}, and $K^{0}_{S}$ Au+Au \sNN{200}. show that a given number participating nucleons, production strange hadrons is higher than same center-of-mass energy. find aspects enhancement factors all can be described by parameterization based on fraction participants undergo multiple collisions.
Previous experimental results based on data ($\ensuremath{\sim}$$15\ifmmode\times\else\texttimes\fi{}{10}^{6}$ events) collected by the STAR detector at BNL Relativistic Heavy Ion Collider suggest event-by-event charge-separation fluctuations perpendicular to event plane in noncentral heavy-ion collisions. Here we present correlator previously used split into its two component parts reveal correlations parallel and plane. The are from a high-statistics 200-GeV Au + collisions set...
The future opportunities for high-density QCD studies with ion and proton beams at the LHC are presented. Four major scientific goals identified: characterisation of macroscopic long wavelength Quark-Gluon Plasma (QGP) properties unprecedented precision, investigation microscopic parton dynamics underlying QGP properties, development a unified picture particle production from small (pp) to large (nucleus--nucleus) systems, exploration densities in nuclei broad ($x$, $Q^2$) kinematic range...
A study is reported of the same- and opposite-sign charge-dependent azimuthal correlations with respect to event plane in Au+Au collisions at 200 GeV. The charge multiplicity asymmetries between up/down left/right hemispheres relative are utilized. contributions from statistical fluctuations detector effects were subtracted (co-)variance observed asymmetries. In mid- most-central collisions, (opposite-) sign pairs preferentially emitted back-to-back (aligned on same-side) directions....
We present results on strange and multi-strange particle production in Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeV as measured with the STAR detector RHIC. Mid-rapidity transverse momentum spectra integrated yields of $K^{0}_{S}$, $\Lambda$, $\Xi$, $\Omega$ their anti-particles are presented for different centrality classes. The ratios follow a smooth energy dependence. Chemical freeze-out parameters, temperature, baryon chemical potential strangeness saturation factor obtained from...
The STAR Collaboration at the Relativistic Heavy Ion Collider presents measurements of $J/\ensuremath{\psi}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}$ midrapidity and high transverse momentum (${p}_{T}>5 \mathrm{GeV}/c$) in $p+p$ central $\mathrm{Cu}+\mathrm{Cu}$ collisions $\sqrt{{s}_{{}_{\mathit{NN}}}}=200$ GeV. inclusive $J/\ensuremath{\psi}$ production cross section for is found to be consistent ${p}_{T}$ with binary collision-scaled collisions. At a confidence level $97%$, this...
Three-particle azimuthal correlation measurements with a high transverse momentum trigger particle are reported for pp, d+Au, and Au+Au collisions at sNN=200 GeV by the STAR experiment. Dijet structures observed in d+Au peripheral collisions. An additional structure is central data, signaling conical emission of correlated charged hadrons. The angle found to be θ=1.37±0.02(stat)−0.07+0.06(syst), independent p⊥.Received 7 May 2008DOI:https://doi.org/10.1103/PhysRevLett.102.052302©2009...
Elliptic flow (v(2)) values for identified particles at midrapidity in Au + collisions, measured by the STAR experiment beam energy scan RHIC sqrt[s(NN)] = 7.7-62.4 GeV, are presented. A beam-energy-dependent difference of v(2) between and corresponding antiparticles was observed. The increases with decreasing is larger baryons compared to mesons. This implies that, lower energies, not consistent universal number-of-constituent-quark scaling that observed 200 GeV.
We report transverse momentum (${p}_{T}\ensuremath{\le}15\text{ }\text{ }\mathrm{GeV}/c$) spectra of ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, $\overline{p}$, ${K}_{S}^{0}$, and ${\ensuremath{\rho}}^{0}$ at midrapidity in $p+p$ $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{NN}}=200\text{ }\mathrm{GeV}$. Perturbative QCD calculations are consistent with ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ but do not reproduce $K$...
We present first measurements of the evolution differential transverse momentum correlation function, C, with collision centrality in Au + interactions at sNN=200GeV. This observable exhibits a strong dependence on that is qualitatively similar to number correlations previously reported. use observed longitudinal broadening near-side peak C increasing estimate ratio shear viscosity entropy density, η/s, matter formed central interactions. obtain an upper limit η/s suggests produced medium...
We report STAR measurements of the longitudinal double-spin asymmetry ${A}_{LL}$, transverse single-spin ${A}_{N}$, and asymmetries ${A}_{\ensuremath{\Sigma}}$ ${A}_{TT}$ for inclusive jet production at mid-rapidity in polarized $p+p$ collisions a center-of-mass energy $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$. The data represent integrated luminosities $7.6\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ with polarization $1.8\text{ polarization, 50%--55% beam were recorded 2005 2006. No evidence...