A5050101355- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- Advanced Data Storage Technologies
- Photocathodes and Microchannel Plates
- Differential Equations and Numerical Methods
- Hydrocarbon exploration and reservoir analysis
- Complex Systems and Time Series Analysis
- Atomic and Molecular Physics
- Numerical methods for differential equations
- Physics of Superconductivity and Magnetism
- International Science and Diplomacy
- Theoretical and Computational Physics
- Seismic Imaging and Inversion Techniques
Institute of Nuclear Physics, Polish Academy of Sciences
2010-2024
Laboratoire de Physique Subatomique et de Cosmologie
2013-2022
Institut National de Physique Nucléaire et de Physique des Particules
2013-2022
Centre National de la Recherche Scientifique
2013-2022
Université Grenoble Alpes
2015-2022
Université Paris-Saclay
2022
University of Münster
2022
UNSW Sydney
2022
University of Jyväskylä
2022
Helsinki Institute of Physics
2022
We present the new nCTEQ15 set of nuclear parton distribution functions with uncertainties. This fit extends CTEQ proton PDFs to include dependence using data on nuclei all way up 208^Pb. The uncertainties are determined Hessian method an optimal rescaling eigenvectors accurately represent for chosen tolerance criteria. In addition Deep Inelastic Scattering (DIS) and Drell-Yan (DY) processes, we also inclusive pion production from RHIC help constrain gluon PDF. Furthermore, investigate...
HERAFitter is an open-source package that provides a framework for the determination of parton distribution functions (PDFs) proton and many different kinds analyses in Quantum Chromodynamics (QCD). It encodes results from wide range experimental measurements lepton–proton deep inelastic scattering proton–proton (proton–antiproton) collisions at hadron colliders. These are complemented with variety theoretical options calculating PDF-dependent cross section predictions corresponding to...
We study the relevance of experimental data on heavy-flavor [${D}^{0}$, $J/\ensuremath{\psi}$, $B\ensuremath{\rightarrow}J/\ensuremath{\psi}$ and $\mathrm{\ensuremath{\Upsilon}}(1S)$ mesons] production in proton-lead collisions at LHC to improve our knowledge gluon-momentum distribution inside heavy nuclei. observe that nuclear effects encoded both most recent global fits parton densities next-to-leading order (nCTEQ15 EPPS16) provide a good overall description data. interpret this as hint...
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...
Fits to the final combined HERA deep-inelastic scattering cross-section data within conventional DGLAP framework of QCD have shown some tension at low x and $$Q^2$$ . A resolution this incorporating $$\ln (1/x)$$ -resummation terms into HERAPDF fits is investigated using xFitter program. The kinematic region where resummation important delineated. Such high-energy not only gives a better description data, particularly longitudinal structure function $$F_L$$ , it also results in gluon PDF...
We present the first open-source analysis of parton distribution functions (PDFs) charged pions using xFitter, an QCD fit framework to facilitate PDF extraction and analyses. Our calculations are implemented at next-to-leading order (NLO) APPLgrids generated by MCFM generator. Using currently available Drell-Yan photon production data, we find valence is well constrained; however, considered data not sensitive enough unambiguously determine sea gluon distributions. Fractions momentum carried...
A common library, TMDlib2, for Transverse-Momentum-Dependent distributions (TMDs) and unintegrated parton (uPDFs) is described, which allows easy access of commonly used TMDs uPDFs, providing a three-dimensional (3D) picture the partonic structure hadrons. The tool TMDplotter web-based plotting implemented in together with collinear pdfs as available LHAPDF.
The 2011 Les Houches workshop was the first to confront LHC data. In two years since previous there have been significant advances in both soft and hard QCD, particularly areas of multi-leg NLO calculations, inclusion those calculations into parton shower Monte Carlos, tuning non-perturbative parameters Carlos. These proceedings describe theoretical that taken place, impact early data, for future development.
HERAFitter is an open-source package that provides a framework for the determination of parton distribution functions (PDFs) proton and many different kinds analyses in Quantum Chromodynamics (QCD). It encodes results from wide range experimental measurements lepton-proton deep inelastic scattering proton-proton (proton-antiproton) collisions at hadron colliders. These are complemented with variety theoretical options calculating PDF-dependent cross section predictions corresponding to...
We provide a comprehensive comparison of $$W^\pm / Z$$ vector boson production data in pPb and PbPb collisions at the LHC with predictions obtained using nCTEQ15 PDFs. identify measurements which have largest potential impact on PDFs, estimate effect including these Bayesian reweighting method. find this set can information as regards both nuclear corrections heavy flavor (strange quark) PDF components. As for proton, parton determination/separation is dependent (from target DIS, example),...
The extraction of the strange quark parton distribution function (PDF) poses a long-standing puzzle. Measurements from neutrino-nucleus deep inelastic scattering (DIS) experiments suggest is suppressed compared to light sea quarks, while recent studies W/Z boson production at LHC imply larger component small x values. As flavor determination in proton depends on nuclear corrections, e.g. heavy-target DIS, heavy ion measurements can provide distinct perspective help clarify this situation. In...
A clear understanding of nuclear parton distribution functions (nPDFs) plays a crucial role in the interpretation collider data taken at Relativistic Heavy Ion Collider, Large Hadron Collider (LHC), and near future Electron-Ion Collider. Even with recent inclusions vector boson light meson production data, uncertainty gluon PDF remains substantial limits heavy ion collision data. To obtain new constraints on PDF, we extend our $\mathrm{nCTEQ}15\mathrm{WZ}+\mathrm{SIH}$ analysis to inclusive...
Beyond leading-order, perturbative QCD requires a choice of factorisation scheme to define the parton distribution functions (PDFs) and hard-process cross-section. The modified minimal-subtraction ($\overline{\mathrm{MS}}$) has long been adopted as default due its simplicity. Alternative schemes have proposed with specific purposes, including, recently, PDF positivity NLO parton-shower matching. In this paper we assemble these in common notation for first time. We perform detailed comparison...
Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that charm bottom PDFs are generated perturbatively by gluon splitting do not involve any non-perturbative degrees of freedom. It is clearly necessary to test this hypothesis with suitable QCD Conversely, a non-perturbative, intrinsic heavy has been predicted literature. We demonstrate very good approximation scale-evolution content...
We calculate the transverse momentum dependent gluon-to-gluon splitting function within $$k_T$$ -factorization, generalizing framework employed in calculation of quark functions Hautmann et al. (Nucl Phys B 865:54-66, arXiv:1205.1759 , 2012), Gituliar (JHEP 01:181, arXiv:1511.08439 2016), Hentschinski (Phys Rev D 94(11):114013, arXiv:1607.01507 2016) and demonstrate at same time consistency extended formalism with previous results. While existing versions factorized evolution equations...
A precise knowledge of nuclear parton distribution functions (nPDFs) is -- among other things important for the unambiguous interpretation hard process data taken in pA and AA collisions at Relativistic Heavy Ion Collider (RHIC) Large Hadron (LHC). The available fixed target deep inelastic scattering (DIS) Drell-Yan (DY) lepton pair production mainly constrain light quark distributions. It hence crucial to include more collider global analyses nPDFs order better pin down different flavors,...
We present the reweighting of two sets nuclear PDFs, nCTEQ15 and EPPS16, using a selection experimental data on heavy-flavor meson [D0, J/psi, J/psi from B Upsilon(1S)] production in proton-lead collisions at LHC which were not used original determination these PDFs. The reweighted PDFs exhibit significantly smaller uncertainties thanks to new constraints. comparison with another RHIC included our procedure. is overall very good serves as validation PDF sets, we dub nCTEQ15_rwHF &...
Global analyses of parton distribution functions (PDFs) have provided incisive constraints on the up and down quark components proton, but constraining other flavor degrees freedom is more challenging. Higher-order theory predictions new data sets contributed to recent improvements. Despite these efforts, strange function has a sizable uncertainty, particularly in small $x$ region. We examine from experiment theory, investigate impact this uncertainty LHC observables. In particular, we study...