Carlos Cárdenas
A5060040447- Advanced Chemical Physics Studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Crystallography and molecular interactions
- Free Radicals and Antioxidants
- Molecular Junctions and Nanostructures
- Photochemistry and Electron Transfer Studies
- Spectroscopy and Quantum Chemical Studies
- Machine Learning in Materials Science
- Computational Drug Discovery Methods
- Molecular Spectroscopy and Structure
- Graphene research and applications
- Organic Chemistry Cycloaddition Reactions
- Chemical Thermodynamics and Molecular Structure
- Thermal and Kinetic Analysis
- High-pressure geophysics and materials
- Boron and Carbon Nanomaterials Research
- Chemical Reaction Mechanisms
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Diamond and Carbon-based Materials Research
- Astrophysics and Star Formation Studies
- Fullerene Chemistry and Applications
- Porphyrin and Phthalocyanine Chemistry
University of Chile
2016-2025
Centro de Investigación y Desarrollo
2025
Millennium Initiative for Collaborative Research on Bacterial Resistance
2012-2024
Research Institute Hospital 12 de Octubre
2024
Universidad Bernardo O'Higgins
2018-2023
University of California, Los Angeles
2023
Universidad Tecnológica de Santiago
2016-2018
Universidad de Santiago de Chile
2013-2017
McMaster University
2009-2014
Université Joseph Fourier
2009
Azimuthal correlations for large transverse momentum charged hadrons have been measured over a wide pseudorapidity range and full azimuth in Au+Au p+p collisions at sqrt[s(NN)]=200 GeV. The small-angle observed all centralities of are characteristic hard-scattering processes previously high-energy collisions. A strong back-to-back correlation exists peripheral Au+Au. In contrast, the reduced considerably most central collisions, indicating substantial interaction as hard-scattered partons or...
Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic charged particles at midrapidity in Au+Au square root(S)NN = 130 GeV using STAR Time Projection Chamber Relativistic Heavy Ion Collider. The signal, v2, averaged over transverse momentum, reaches values about 6% for relatively peripheral and decreases more central collisions. This can be interpreted as observation higher degree thermalization...
Inclusive transverse momentum distributions of charged hadrons within 0.2<p(T)<6.0 GeV/c have been measured over a broad range centrality for Au+Au collisions at sqrt[s(NN)]=130 GeV. Hadron yields are suppressed high p(T) in central relative to peripheral and nucleon-nucleon reference scaled collision geometry. Peripheral not the reference. The suppression varies continuously intermediate centralities. results indicate significant nuclear medium effects on high-p(T) hadron production...
This review systematically examines the use of additive manufacturing (AM), also known as 3D printing (3DP), in various aspects military applications such firearms, armor and ballistic resistant structures, including those bioinspired. The main goal is to provide a comprehensive exploration AM applications. materials structures created using technologies are analyzed reported. Dynamic loading, impact via Charpy Izod tests were explored search, although not considered results be typically...
Elliptic flow holds much promise for studying the early-time thermalization attained in ultrarelativistic nuclear collisions. Flow measurements also provide a means of distinguishing between hydrodynamic models and calculations which approach low density (dilute gas) limit. Among effects that can complicate interpretation elliptic are azimuthal correlations unrelated to reaction plane (non-flow correlations). Using data Au + collisions at sqrt{s_{NN}} = 130 GeV from STAR TPC, it is found...
We report first results on elliptic flow of identified particles at midrapidity in $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{\mathrm{NN}}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}130\mathrm{GeV}$ using the STAR TPC RHIC. The as a function transverse momentum and centrality differs significantly for different masses. This dependence can be accounted hydrodynamic models, indicating that system created shows behavior consistent with collective hydrodynamical flow. fit to data...
Two-pion correlation functions in Au+Au collisions at $\sqrt{s_{NN}} = 130$ GeV have been measured by the STAR (Solenoidal Tracker RHIC) detector. The source size extracted fitting correlations grows with event multiplicity and decreases transverse momentum. Anomalously large sizes or emission durations, which suggested as signals of quark-gluon plasma formation rehadronization, are not observed. HBT parameters display a weak energy dependence over broad range $\sqrt{s_{NN}}$.
The second-order response of the electron density with respect to changes in number, known as dual descriptor, has been established a key reactivity indicator for reactions like pericyclic reactions, where reagents accept and donate electrons concurrently. Here we establish that descriptor is also ambiphilic reagents: can act either electrophiles or nucleophiles, depending on reaction partner. Specifically, study atoms (which are proposed act, simultaneously, an acceptor donor), molecules...
The prediction of reactivity is one the long‐standing objectives chemistry, contributing to enforce link between theory and experiment. In particular, regioselectivity aromatic molecules has motivated proposal different descriptors based on foundational theories, like Frontier Molecular Orbital (FMO) density functional theory, predict rationalize such regioselectivity. This article examines cases where descriptors, FMO are known have failed, specifically electrophilic substitution reactions,...
Azimuthal anisotropy (v(2)) and two-particle angular correlations of high p(T) charged hadrons have been measured in Au+Au collisions at sqrt[s(NN)]=130 GeV for transverse momenta up to 6 GeV/c, where hard processes are expected contribute significantly. The exhibit elliptic flow a structure suggestive fragmentation partons. monotonic rise v(2)(p(T)) p(T)<2 GeV/c is consistent with collective hydrodynamical calculations. At p(T)>3 saturation v(2) observed which persists p(T)=6 GeV/c.
The minimum-bias multiplicity distribution and the transverse momentum pseudorapidity distributions for central collisions have been measured negative hadrons ( h(-)) in Au+Au interactions at square root of ([s(NN)]) = 130 GeV. density midrapidity 5% most is dN(h(-))/d(eta)/(eta 0) 280+/-1(stat)+/-20(syst), an increase per participant 38% relative to pp same energy. mean 0.508+/-0.012 GeV/c larger than Pb+Pb lower energies. scaling h(-) yield a strong function p( perpendicular). almost...
We report the first measurement of strange (Lambda) and antistrange (Lambda macro) baryon production from square root [s(NN)]=130 GeV Au+Au collisions at Relativistic Heavy Ion Collider (RHIC). Rapidity density transverse mass distributions midrapidity are presented as a function centrality. The yield Lambda Lambda; hyperons is found to be approximately proportional number negative hadrons. relative hadrons increases very rapidly with momentum. magnitude increase cannot described by existing...
Density-functional-theory-based chemical reactivity indicators are formulated for degenerate and near-degenerate ground states. For states, the functional derivatives of energy with respect to external potential do not exist, must be replaced by weaker concept variation. The resultant depend on specific perturbation. Because it is sometimes impractical compute a perturbation, we consider two special cases: point-charge perturbations Dirac delta function perturbations. provide upper bounds...
We present benchmark values for the electronic chemical potential and hardness from reference data ionization potentials electron affinities.
We report results on the ratio of midrapidity antiproton-to-proton yields in Au+Au collisions at sqrt[s(NN)] = 130 GeV per nucleon pair as measured by STAR experiment RHIC. Within rapidity and transverse momentum range /y/<0.5 0.4<p(t)<1.0 GeV/c, is essentially independent either or rapidity, with an average 0.65+/-0.01((stat))+/-0.07((syst)) for minimum bias collisions. errors, no strong centrality dependence observed. The indicate that this RHIC energy, although p-p production becomes...
We report STAR results on the azimuthal anisotropy parameter v2 for strange particles K0S, L and Lbar at midrapidity in Au+Au collisions sNN = 130 GeV RHIC. The value of as a function transverse momentum produced pt collision centrality is presented both up to 3.0 GeV/c. A strong dependence observed 2.0 measurement compared with hydrodynamic model calculations. physics implications integrated magnitude particle mass are also discussed.
The balance function is a new observable based on the principle that charge locally conserved when particles are pair produced. Balance functions have been measured for charged particle pairs and identified pion in Au+Au collisions at square root of SNN = 130 GeV Relativistic Heavy Ion Collider using STAR. peripheral widths consistent with model predictions superposition nucleon-nucleon scattering. Widths central smaller, trends predicted by models incorporating late hadronization.
We present the results of charged particle fluctuations measurements in Au + collisions at $\sqrt{s_{NN}}=130$ GeV using STAR detector. Dynamical are presented for inclusive multiplicities as well identified pions, kaons, and protons. The net charge dynamical found to be large negative providing clear evidence that positive production is correlated within pseudorapidity range investigated. Correlations smaller than expected based on model-dependent predictions a resonance gas or quark gluon...
Despite recent advances in computing negative electron affinities using density-functional theory, it is an open issue as to whether appropriate use affinities, instead of zero affinity, compute the chemical hardness atoms and molecules with metastable anions. We seek answer this question accepted empirical rules linking atomic size polarizability; we also propose a new correlation C6 London dispersion coefficient. For reactivity gas phase, seems make no difference negative, or zero, are...
In the course of a reaction it is shape Fukui potential that guides distant reagent toward site where an electrophile/nucleophile willing to accept/donate charge. this paper we explore mathematical characteristics and demonstrate its relationship hardness ability atom in molecule change The not only determines active for electron transfer, but also approximates distribution molecule: Coulomb contribution frontier local hardness. at position nuclei equal variation chemical with nuclear charge...
A system in a spatially (quasi-)degenerate ground state responds qualitatively different way to change the external potential. Consequently, usual method for computing Fukui function, namely, taking difference between electron densities of N- and N ± 1 systems, cannot be applied directly. It is shown how matrix, thus also depends on nature perturbation. One needs use degenerate perturbation theory given perturbing potential generate density matrix whose with respect number electrons equals...
In the first paper of this series, authors derived an expression for interaction energy between two reagents in terms chemical reactivity indicators that can be from density functional perturbation theory. While negative energies explain reactivity, is often more simply explained using "|dμ| big good" rule or maximum hardness principle. Expressions change potential (μ) and when interact are derived. A partial justification principle appear reappear hardness, but with opposite sign.