A5009041224- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Neutrino Physics Research
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Radio Astronomy Observations and Technology
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Atmospheric Ozone and Climate
- Advanced Data Storage Technologies
- Atmospheric aerosols and clouds
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Machine Learning in Materials Science
- International Science and Diplomacy
- Black Holes and Theoretical Physics
- Scientific Computing and Data Management
- Pulsars and Gravitational Waves Research
- Algorithms and Data Compression
National Institute for Subatomic Physics
2017-2024
Vrije Universiteit Amsterdam
2017-2024
Comisión Nacional de Energía Atómica
2007-2024
Radboud University Nijmegen
2023
University of Pittsburgh
2022
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2022
Brookhaven National Laboratory
2022
Deutsches Elektronen-Synchrotron DESY
2022
Lawrence Berkeley National Laboratory
2022
Pierre Auger Observatory
2009-2020
We present NNPDF3.0, the first set of parton distribution functions (PDFs) determined with a methodology validated by closure test. NNPDF3.0 uses global dataset including HERA-II deep-inelastic inclusive cross-sections, combined HERA charm data, jet production from ATLAS and CMS, vector boson rapidity transverse momentum distributions ATLAS, CMS LHCb, W +c data top quark pair total cross sections CMS. Results are based on LO, NLO NNLO QCD theory also include electroweak corrections. To...
We present a new set of parton distributions, NNPDF3.1, which updates NNPDF3.0, the first global PDFs determined using methodology validated by closure test. The update is motivated recent progress in and available data, involves both. On methodological side, we now parametrize determine charm PDF alongside light-quark gluon ones, thereby increasing from seven to eight number independent PDFs. data include D0 electron muon
We provide an updated recommendation for the usage of sets parton distribution functions (PDFs) and assessment PDF PDF+ uncertainties suitable applications at LHC Run II. review developments since previous PDF4LHC recommendation, discuss compare new generation PDFs, which include substantial information from experimental data I LHC. then propose a prescription combination subset available sets, is presented in terms single combined set. finally tools allow delivery this set optimized Hessian...
We present an updated set of parameters for the PYTHIA 8 event generator. reevaluate constraints imposed by LEP and SLD on hadronization, in particular with regard to heavy-quark fragmentation strangeness production. For hadron collisions, we combine a new NNPDF2.3 LO PDF set. use minimum-bias, Drell-Yan, underlying-event data from LHC constrain initial-state-radiation multi-parton-interaction parameters, combined SPS Tevatron energy scaling. Several distributions show significant...
Abstract Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons well nuclei. As a future high energy nuclear physics project, Electron-ion collider in China (EicC) has been proposed. It will be constructed based on upgraded heavy-ion accelerator, High Intensity Accelerator Facility (HIAF) which currently under construction, together with new electron ring. The proposed provide highly polarized electrons (with polarization ∼80%) and...
The discovery by the ATLAS and CMS experiments of a new boson with mass around 125 GeV measured properties compatible those Standard-Model Higgs boson, coupled absence discoveries phenomena beyond Standard Model at TeV scale, has triggered interest in ideas for future factories. A circular e+e- collider hosted 80 to 100 km tunnel, TLEP, is among most attractive solutions proposed so far. It clean experimental environment, produces high luminosity top-quark, W Z studies, accommodates multiple...
We present a first global determination of spin-dependent parton distribution functions (PDFs) and their uncertainties using the NNPDF methodology: NNPDFpol1.1. Longitudinally polarized deep-inelastic scattering data, already used for previous NNPDFpol1.0 PDF set, are supplemented with most recent hadron collider data inclusive jet W boson production from STAR PHENIX experiments at RHIC, open-charm COMPASS experiment, thereby allowing separate quark antiquark PDFs, an improved medium-...
We present a new set of parton distribution functions (PDFs) based on fully global dataset and machine learning techniques: NNPDF4.0. expand the NNPDF3.1 determination with 44 datasets, mostly from LHC. derive novel methodology through hyperparameter optimisation, leading to an efficient fitting algorithm built upon stochastic gradient descent. use NNLO QCD calculations account for NLO electroweak corrections nuclear uncertainties. Theoretical improvements in PDF description include...
This document is intended as a study of benchmark cross sections at the LHC (at 7 TeV) NLO using modern parton distribution functions currently available from 6 PDF fitting groups that have participated in this exercise. It also contains succinct user guide to computation PDFs, uncertainties and correlations sets. A companion note, submitted archive, provides an interim summary current recommendations PDF4LHC working group for use LHC, section uncertainty calculations.
This Report summarizes the proceedings of 2015 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard Model calculations, (II) PDF4LHC parton distributions, (III) issues in theoretical description production Higgs bosons and how to relate experimental measurements, (IV) a host phenomenological studies essential comparing LHC data from Run I predictions projections future measurements II, (V) Monte Carlo event generators.
A bstract We present a global interpretation of Higgs, diboson, and top quark production decay measurements from the LHC in framework Standard Model Effective Field Theory (SMEFT) at dimension six. constrain simultaneously 36 independent directions its parameter space, compare outcome analysis with that individual two-parameter fits. Our results are obtained by means state-of-the-art theoretical calculations for SM EFT cross-sections, account both linear quadratic corrections 1 / Λ 2...
Abstract High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along beam collision axis, outside acceptance existing LHC experiments. The proposed Forward Physics Facility (FPF), to be located several hundred meters from ATLAS interaction point and shielded by concrete rock, will host suite experiments probe standard model (SM) processes search for physics beyond (BSM). In this report, we review status civil engineering plans explore...
The successful operation of the Large Hadron Collider (LHC) and excellent performance ATLAS, CMS, LHCb ALICE detectors in Run-1 Run-2 with $pp$ collisions at center-of-mass energies 7, 8 13 TeV as well giant leap precision calculations modeling fundamental interactions hadron colliders have allowed an extraordinary breadth physics studies including measurements a variety processes. LHC results so far confirmed validity Standard Model particle up to unprecedented energy scales great sectors...
The Forward Physics Facility (FPF) is a proposal to create cavern with the space and infrastructure support suite of far-forward experiments at Large Hadron Collider during High Luminosity era. Located along beam collision axis shielded from interaction point by least 100 m concrete rock, FPF will house that detect particles outside acceptance existing large LHC observe rare exotic processes in an extremely low-background environment. In this work, we summarize current status plans for FPF,...
Abstract A precise knowledge of the quark and gluon structure proton, encoded by parton distribution functions (PDFs), is paramount importance for interpretation high-energy processes at present future lepton–hadron hadron–hadron colliders. Motivated recent progress in PDF determinations carried out CT, MSHT, NNPDF groups, we an updated combination global fits: PDF4LHC21. It based on Monte Carlo CT18, MSHT20, NNPDF3.1 sets followed either its Hessian reduction or replica compression....
Abstract The theory of the strong force, quantum chromodynamics, describes proton in terms quarks and gluons. is a state two up one down quark bound by gluons, but predicts that addition there an infinite number quark–antiquark pairs. Both light heavy quarks, whose mass respectively smaller or bigger than proton, are revealed inside high-energy collisions. However, it unclear whether also exist as part wavefunction, which determined non-perturbative dynamics accordingly unknown: so-called...