A5034593855- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Geophysics and Gravity Measurements
- Computational Physics and Python Applications
- Groundwater flow and contamination studies
- Enhanced Oil Recovery Techniques
- Magnetic confinement fusion research
- Nuclear physics research studies
- Treatment of Major Depression
- Markov Chains and Monte Carlo Methods
- International Science and Diplomacy
- Radioactive Decay and Measurement Techniques
- Glass properties and applications
- Solid State Laser Technologies
- Neutrino Physics Research
- Product Development and Customization
- Advanced Statistical Process Monitoring
- Radiopharmaceutical Chemistry and Applications
- Petroleum Processing and Analysis
- Science and Science Education
University of Buenos Aires
2014-2025
University of Tübingen
2024
Instituto de Física de Buenos Aires
2024
Fundación Ciencias Exactas y Naturales
2010-2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2010-2023
Mississippi State University
2022
National University of General San Martín
2017-2021
Brookhaven National Laboratory
2015-2020
International Center for Advanced Studies
2017-2019
Instituto de Física La Plata
2016
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
We present new sets of pion and kaon fragmentation functions obtained in next-to-leading order combined analyses single-inclusive hadron production electron-positron annihilation, proton-proton collisions, deep-inelastic lepton-proton scattering with either pions or kaons identified the final state. At variance all previous fits, take into account data where hadrons different electrical charge are identified, which allow one to discriminate quark from antiquark without need nontrivial flavor...
We analyse recent data on the production of forward neutrons in deep inelastic scattering at HERA framework a perturbative QCD description for semi-inclusive processes, which includes fracture functions. Using model estimate non-perturbative piece fragmentation process, fairly good agreement with available data, we $Q^2$ dependence resulting functions, is driven by non-homogeneous evolution equations. also propose measurement pion cross section target region as new test QCD, this case...
We discuss techniques and results for the extraction of nucleon's spin-dependent parton distributions their uncertainties from data polarized deep-inelastic lepton-nucleon proton-proton scattering by means a global QCD analysis. Computational methods are described that significantly increase speed required calculations to level allows one perform full analysis consistently at next-to-leading order accuracy. examine how various sets help constrain different aspects quark, antiquark, gluon...
We discuss the impact of recent high-statistics RHIC data on determination gluon polarization in proton context a global QCD analysis polarized parton distributions. find clear evidence for non-vanishing gluons region momentum fraction and at scales mostly probed by data. Although information from low fractions is presently lacking, this finding suggestive significant contribution spin to spin, thereby limiting amount orbital angular required balance budget.
We present a new global QCD analysis of nuclear parton distribution functions and their uncertainties. In addition to the most commonly analyzed data sets for deep-inelastic scattering charged leptons off nuclei Drell-Yan di-lepton production, we include also measurements neutrino-nucleus inclusive pion production in deuteron-gold collisions. The is performed at next-to-leading order accuracy perturbative general mass variable flavor number scheme, adopting current set free nucleon...
We present a new, comprehensive global analysis of parton-to-pion fragmentation functions at next-to-leading order accuracy in QCD. The obtained results are based on the latest experimental information single-inclusive pion production electron-positron annihilation, lepton-nucleon deep-inelastic scattering, and proton-proton collisions. An excellent description all data sets is achieved, remaining uncertainties estimated Hessian method. Extensive comparisons to from our previous performed.
We perform a next to leading order QCD global analysis of nuclear deep inelastic scattering and Drell-Yan data using the convolution approach parametrize parton densities. find both significant improvement in agreement with compared previous extractions, substantial differences scale dependence effects analyses.
We present a new analysis of the helicity parton distributions nucleon. The takes into account available data from inclusive and semi-inclusive polarized deep inelastic scattering, as well proton-proton (p-p) scattering at RHIC. For first time, all theoretical calculations are performed fully next-to-leading order (NLO) perturbative QCD, using method that allows incorporation NLO corrections in very fast efficient way analysis. find evidence for rather small gluon polarization nucleon, over...
We present new sets of fragmentation functions for protons and inclusive charged hadrons obtained in combined next-to-leading order QCD analyses single-inclusive hadron production electron-positron annihilation, proton-proton collisions, deep-inelastic lepton-proton scattering. These complement previous results pion kaon with charge flavor discrimination. The Lagrange multiplier technique is used to assess the uncertainties extraction functions.
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
We revisit the global QCD analysis of parton-to-kaon fragmentation functions at next-to-leading order accuracy using latest experimental information on single-inclusive kaon production in electron-positron annihilation, lepton-nucleon deep-inelastic scattering, and proton-proton collisions. An excellent description all data sets is achieved, remaining uncertainties are estimated discussed based Hessian method. Extensive comparisons to results from our previous made.
Time and again, spin has been a key element in the exploration of fundamental physics. Spin-dependent observables have often revealed deficits assumed theoretical framework led to novel developments concepts. Spin is exploited many parity-violating experiments searching for physics beyond Standard Model or studying nature nucleon-nucleon forces. The RHIC program plays special role this grand scheme: it uses study how complex many-body system such as proton arises from dynamics QCD. Many...
We implement a Monte Carlo sampling strategy to extract helicity parton densities and their uncertainties from reference set of longitudinally polarized scattering data, chosen be that used in the DSSV14 global analysis. Instead adopting simplest possible functional forms for distributions imposing certain restrictions on parameter space order constrain them, we employ redundant, flexible parametrizations fit them large number replicas existing data. The optimum its uncertainty estimates are...
We carry out a global QCD analysis of parton-to-pion fragmentation functions at next-to-next-to-leading order (NNLO) accuracy by performing fit to the combined set single-inclusive electron-positron annihilation and, for first time, semi-inclusive deep-inelastic scattering multiplicity data. For latter, we utilize approximate NNLO corrections that were derived recently within threshold resummation formalism. explore impact on description datasets in various kinematic regimes and resulting...
We update our extraction of parton-to-charged hadron fragmentation functions at next-to-leading order accuracy in quantum chromodynamics (QCD), focusing on the wealth data collected Large Hadron Collider over past decade. obtain an accurate description single-inclusive processes involving unidentified charged hadrons produced different rapidities and transverse momenta proton-proton collisions a wide range center-of-mass system energies between 0.9 13 TeV, along with measurements performed...
We investigate the sea quark polarization in nucleon by means of a combined next to leading order analysis recently enlarged set inclusive and semi-inclusive polarized deep inelastic scattering data. Using Lagrange multiplier method, we assess uncertainty inherent extraction different spin-dependent parton densities QCD global fit impact increased data now available. comment on future prospects at Relativistic Heavy Ion Collider Thomas Jefferson National Laboratory their potential...
The exploration of the fundamental structure strongly interacting matter has always thrived on complementarity lepton scattering and purely hadronic probes. As community eagerly anticipates a future electron ion collider (EIC) in U.S., an outstanding scientific opportunity remains to complete "must-do" measurements p+p p+A physics years preceding EIC. we describe this document, these will be essential fully realize promise EIC by provid-ing comprehensive set collisions that, when combined...
We revisit the description of pion production in proton-proton collisions light very precise data taken at Large Hadron Collider (LHC) over past decade. First attempts to include LHC results next-to-leading order global QCD analyses parton-to-pion fragmentation functions insinuated some conflict between sets different center-of-mass system energies. show that can be well described within their uncertainties by a consistent set once theoretical scale dependence is into account analysis.
We revisit the notion of nuclear parton-to-pion fragmentation functions at next-to-leading order accuracy as an effective description hadroproduction in environments such semi-inclusive lepton-nucleus deep-inelastic scattering and single inclusive proton-nucleus collisions. assess their viability face very precise data collected for latter CERN-LHC over past decade well recent measurements former carried out by CLAS experiment JLab. Published American Physical Society 2025
Fragmentation functions for eta mesons are extracted at next-to-leading order accuracy of QCD in a global analysis data taken electron-positron annihilation and proton-proton scattering experiments. The obtained parametrization is good agreement with all sets analyzed can be utilized, instance, future studies double-spin asymmetries single-inclusive production. Lagrange multiplier technique used to estimate the uncertainties fragmentation assess role different constraining them.
We studied the impact of future electron ion collider inclusive and semi-inclusive polarized deep inelastic scattering data will have on determination helicity parton distributions. Supplementing Monte Carlo sampling variant DSSV14 analysis with pseudodata electron-proton updated uncertainty estimates for two different center-of-mass-system energies, $\sqrt{s}=44.7\text{ }\text{ }\mathrm{GeV}$ $\sqrt{s}=141.4\text{ }\mathrm{GeV}$, respectively, electron-helium collisions at...
We present a detailed phenomenological analysis of single-inclusive hadron production at the CERN-LHC in both proton-proton and proton-lead collisions. First data from LHC experiments on charged spectra are compared to next-to-leading order QCD expectations, predictions made for identified pion, kaon, proton distributions differential transverse momentum rapidity energies 900 GeV 14 TeV. The results obtained with latest sets vacuum fragmentation functions based global analyses, recently...
We perform a detailed phenomenological analysis of how well hadronization in nuclear environments can be described terms effective fragmentation functions. The medium modified functions are assumed to factorize from the partonic scattering cross sections and evolve hard scale same way as standard or vacuum Based on precise data semi-inclusive deep-inelastic off nuclei hadron production deuteron-gold collisions, we extract sets for pions kaons at NLO accuracy. obtained provide rather accurate...
We present a quantitative assessment of the impact future electron-ion collider will have on determinations helicity quark and gluon densities their contributions to proton spin. Our results are obtained by performing series global QCD analyses at next-to-leading order accuracy based realistic sets pseudo-data for inclusive semi-inclusive deep-inelastic scattering longitudinally polarized electrons protons different, conceivable center-of-mass system energies.