Alberto Accardi
A5023912097- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Black Holes and Theoretical Physics
- Inorganic Fluorides and Related Compounds
- Dark Matter and Cosmic Phenomena
- Noncommutative and Quantum Gravity Theories
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Computational Fluid Dynamics and Aerodynamics
- Fluid Dynamics and Turbulent Flows
- Library Science and Information Systems
- Electron and X-Ray Spectroscopy Techniques
- Advanced Data Storage Technologies
- Superconductivity in MgB2 and Alloys
- Superconducting Materials and Applications
Thomas Jefferson National Accelerator Facility
2016-2025
Christopher Newport University
2025
Hampton University
2015-2024
Old Dominion University
2018-2022
Institut des Sciences des Plantes de Paris Saclay
2018
Stony Brook University
2018
Morehouse College
2018
Shiv Nadar University
2018
Central China Normal University
2018
University of Monastir
2017
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 a new set of leading twist parton distribution functions, referred to as "CJ15", which take advantage developments in the theoretical treatment nuclear corrections well data. The analysis includes for first time data on free neutron structure function from Jefferson Lab, and high-precision charged lepton W-boson asymmetry Fermilab. These significantly reduce uncertainty d/u ratio at large values x provide insights into partonic bound nucleons.
This report is based on a ten-week program Gluons and the quark sea at high-energies, which took place Institute for Nuclear Theory (INT) in Seattle Fall 2010. The principal aim of was to develop sharpen science case an Electron-Ion Collider (EIC), facility that will be able collide electrons positrons with polarized protons light heavy nuclei high energies, offering unprecedented possibilities in-depth studies quantum chromodynamics (QCD). organized around following four major themes: (i)...
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 three new sets of next-to-leading order parton distribution functions (PDFs) determined by global fits to a wide variety data for hard scattering processes. The analysis includes target mass and higher twist corrections needed the description deep inelastic at large x low Q^2, nuclear deuterium targets. PDF correspond different models effects, provide more realistic uncertainty range d quark PDF, in particular, compared with previous fits. describe error each choice corrections,...
We present a comprehensive new global QCD analysis of polarized inclusive deep-inelastic scattering, including the latest high-precision data on longitudinal and transverse polarization asymmetries from Jefferson Lab elsewhere. The is performed using iterative Monte Carlo fitting technique which generates stable fits to parton distribution functions (PDFs) with statistically rigorous uncertainties. Inclusion leads reduction in PDF errors for valence sea quarks, as well gluon uncertainty at...
The accurate determination of the parton distribution functions (PDFs) proton is an essential ingredient Large Hadron Collider (LHC) program. PDF uncertainties impact a wide range processes, from Higgs boson characterization and precision Standard Model measurements to new physics searches. A major recent development in modern analyses has been exploit wealth information contained LHC Run I, as well progress tools methods include these data fits. In this report we summarize that...
We review the present status of determination parton distribution functions (PDFs) in light precision requirements for LHC Run 2 and other future hadron colliders. provide brief reviews all currently available PDF sets use them to compute cross sections a number benchmark processes, including Higgs boson production gluon-gluon fusion at LHC. show that differences predictions obtained with various PDFs are due particular theory assumptions made fits those PDFs. discuss uncertainties kinematic...
We perform the first iterative Monte Carlo (IMC) analysis of fragmentation functions constrained by all available data from single-inclusive ${e}^{+}{e}^{\ensuremath{-}}$ annihilation into pions and kaons. The IMC method eliminates potential bias in traditional analyses based on single fits introduced fixing parameters not well provides a statistically rigorous determination uncertainties. Our reveals specific features using new methodology those obtained previous analyses, especially for...
This document presents the initial scientific case for upgrading Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab (JLab) to 22 GeV. It is result of a community effort, incorporating insights from series workshops conducted between March 2022 and April 2023. With track record over 25 years in delivering world's most intense precise multi-GeV electron beams, CEBAF's potential higher energy upgrade unique opportunity an innovative nuclear physics program, which seamlessly...
We critically examine uncertainties in parton distribution functions (PDFs) at large $x$ arising from nuclear effects deuterium ${F}_{2}$ structure function data. Within a global PDF analysis, we assess the impact on PDFs deuteron wave short distances and nucleon off-shell effects, use of relativistic kinematics, less restrictive parametrization $d/u$ ratio. find, particular, that $d$-quark gluon vary significantly with choice model. highlight these determination neutron functions, $W$ boson...
We report results of a new global next-to-leading order fit parton distribution functions in which cuts on $W$ and $Q$ are relaxed, thereby including more data at high values $x$. Effects target mass corrections, higher twist contributions, nuclear corrections for deuterium significant the large-$x$ region. The leading distributions found to be stable correction model variations as long contributions also included. behavior $d$ quark $x\ensuremath{\rightarrow}1$ is particularly sensitive...
We present the first results of a new global next-to-leading order analysis spin-dependent parton distribution functions from most recent world data on inclusive polarized deep-inelastic scattering, focusing in particular large-$x$ and low-${Q}^{2}$ regions. By directly fitting polarization asymmetries we eliminate biases introduced by using structure function extracted under nonuniform assumptions for unpolarized functions. For implement nuclear smearing corrections deuterium...
This report presents a brief summary of the science opportunities and program polarized medium energy electron-ion collider at Jefferson Lab comprehensive description conceptual design such based on CEBAF electron accelerator facility.
Abstract Experimental measurements in deep-inelastic scattering and lepton-pair production on deuterium targets play an important role the flavor separation of u d (anti)quarks global QCD analyses parton distribution functions (PDFs) nucleon. We investigate impact theoretical corrections accounting for light-nuclear structure deuteron upon fitted , -quark, gluon, other PDFs CJ15 CT18 families next-to-leading order CTEQ analyses. The investigation is done using $$L_2$$ <mml:math...
Multiple initial state parton interactions in p(d)+Au collisions are calculated a Glauber-Eikonal formalism. The convolution of perturbative QCD parton-nucleon cross sections predicts naturally the competing pattern low-pT suppression due geometrical shadowing, and moderate-pT Cronin enhancement hadron spectra. formal equivalence to recent classical Yang-Mills calculations is demonstrated, but our approach shown be more general large x>0.01 domain because it automatically incorporates finite...
We review recent progress in the study of parton propagation, interaction and fragmentation both cold hot strongly interacting matter. Experimental highlights on high-energy hadron production deep inelastic lepton-nucleus scattering, proton-nucleus heavy-ion collisions, as well Drell-Yan processes hadron-nucleus collisions are presented. The existing theoretical frameworks for describing in-medium energetic partons space-time evolution their into hadrons discussed confronted to experimental...
We perform a comprehensive analysis of target mass corrections (TMCs) to spin-averaged structure functions and asymmetries at next-to-leading order. Several different prescriptions for TMCs are considered, including the operator product expansion, various approximations it, collinear factorization, xi-scaling. assess impact each these on number observables, such as neutron proton F_2 function ratio, parity-violating electron scattering protons deuterons which sensitive gamma-Z interference...