A5021876499- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Nuclear physics research studies
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Advanced Data Storage Technologies
- Nuclear Physics and Applications
- Asymmetric Hydrogenation and Catalysis
- Atomic and Subatomic Physics Research
- Luminescence and Fluorescent Materials
- Cold Atom Physics and Bose-Einstein Condensates
- Catalytic C–H Functionalization Methods
- Advanced biosensing and bioanalysis techniques
- Advanced X-ray Imaging Techniques
- Nuclear reactor physics and engineering
- Carbon dioxide utilization in catalysis
- Dark Matter and Cosmic Phenomena
- Molecular Sensors and Ion Detection
- Atomic and Molecular Physics
- Context-Aware Activity Recognition Systems
- Seismic Waves and Analysis
National Centre for Nuclear Research
2015-2024
Pennsylvania State University
2023
University of Warsaw
2007-2023
AGH University of Krakow
2023
Institute of Nuclear Physics, Polish Academy of Sciences
2023
University of Kansas
2023
Jagiellonian University
2023
Lawrence Berkeley National Laboratory
2022
Université Paris-Saclay
2017-2019
Centre National de la Recherche Scientifique
2013-2019
We describe the architecture and functionalities of a C++ software framework, coined PARTONS, dedicated to phenomenology Generalized Parton Distributions. These distributions three-dimensional structure hadrons in terms quarks gluons, can be accessed deeply exclusive lepto- or photo-production mesons photons. PARTONS provides necessary bridge between models Distributions experimental data collected various production channels. outline specification framework practical needs, physical content...
We study timelike and spacelike virtual Compton scattering in the generalized Bjorken scaling regime at next-to-leading order strong coupling constant, medium energy range which will be studied intensely JLab12 COMPASS-II experiment CERN. show that Born amplitudes get sizeable $O({\ensuremath{\alpha}}_{s})$ corrections and, even moderate energies, gluonic contributions are by no means negligible. stress cases complementary their difference deserves much special attention.
We revisit the phenomenology of deep exclusive electroproduction a lepton pair, i.e. double deeply virtual Compton scattering (DDVCS), in view new experiments planned near future. The importance DDVCS reconstruction generalized parton distributions (GPDs) their full kinematic domain is emphasized. Using Kleiss-Stirling spinor techniques, we provide leading order complex amplitudes for both and Bethe-Heithler sub-processes. Such formulation turns out to be convenient practical implementation...
We calculate the O(alpha_s) corrections to timelike, spacelike and double deeply virtual Compton scattering amplitudes in generalized Bjorken scaling region. Special attention is devoted studies of difference between next leading order timelike coefficient functions, which plays for this process a role analogous large K factor was much discussed analysis inclusive Drell Yan cross sections. Also present nature hard scale gives rise new absorptive part amplitude presence characteristic pi^2...
We show to next-to-leading order accuracy in the strong coupling ${\ensuremath{\alpha}}_{s}$ how collinear factorization properties of QCD generalized Bjorken regime relate exclusive amplitudes for spacelike and timelike hadronic processes. This yields simple space-to-timelike relations linking electroproduction a photon or meson those photo- mesoproduction lepton pair. These constitute new test relevance leading twist analyses experimental data.
We propose new parameterizations for the border and skewness functions appearing in description of 3D nucleon structure language generalized parton distributions (GPDs). These are constructed a way to fulfill basic properties GPDs, like their reduction density elastic form factors. They also rely on power behavior GPDs $$x \rightarrow 1$$ limit propounded analyticity property Mellin moments GPDs. evaluate compton factors (CFFs), sub-amplitudes deeply virtual scattering (DVCS) process, at...
We develop the analysis of diphoton exclusive photoproduction in kinematics where a collinear QCD factorization framework applies, namely nearly forward large invariant mass production. work at leading twist level and next-to-leading order (NLO) strong coupling constant $\alpha_S$. compare our predictions for cross-sections with Born calculations experimental conditions accessible to JLab experiments show interesting sensitivity results various models generalized parton distributions (GPDs)....
The electromagnetic probe has proven to be a very efficient way access the $3-$dimensional structure of nucleon, particularly thanks exclusive Compton processes. We explore hard photoproduction large invariant mass diphoton in kinematical regime where is nearly forward and its scale enabling factorize scattering amplitude terms generalized parton distributions. This peculiar interesting analytic structure. calculate unpolarized cross sections angular asymmetry triggered by linearly polarized...
Exclusive photoproduction of dileptons, $\ensuremath{\gamma}N\ensuremath{\rightarrow}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}N$, is and will be measured in ultraperipheral collisions at hadron colliders, such as the Tevatron, Relativistic Heavy Ion Collider, LHC. We demonstrate that timelike deeply virtual Compton scattering mechanism $\ensuremath{\gamma}q\ensuremath{\rightarrow}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}q$ where lepton pair comes from...
We study the exclusive electroproduction of a photon pair in kinematical regime where diphoton invariant mass is large and nucleon flies almost its original direction. discuss relative importance QCD process two photons originate from quark line compared to single (double) Bethe-Heitler processes one (two) lepton line. This turns out be promising tool generalized parton distributions nucleon, both at medium energy JLab high electron ion collider.
In the framework of collinear QCD factorization, leading twist scattering amplitudes for deeply virtual Compton (DVCS) and timelike (TCS) are intimately related thanks to analytic properties next-to-leading order amplitudes. We exploit this welcome feature make data-driven predictions TCS observables be measured in near future experiments. Using a recent extraction DVCS form factors from most existing experimental data that process, we derive calculate only assuming leading-twist dominance....
We calculate in the framework of collinear factorization amplitude for photoproduction a near forward large mass diphoton at leading twist and next to order (NLO) ${\ensuremath{\alpha}}_{s}$. demonstrate validity this order, which was never achieved such reaction where coefficient function describes $2\ensuremath{\rightarrow}3$ hard process. While Born purely imaginary only probed $x=\ifmmode\pm\else\textpm\fi{}\ensuremath{\xi}$ cross-over line generalized parton distributions (GPD) domain,...
The extraction of Compton Form Factors (CFFs) in a global analysis almost all Deeply Virtual Scattering (DVCS) proton data is presented. extracted quantities are DVCS sub-amplitudes and the most basic observables which unambiguously accessible from this process. parameterizations CFFs constructed utilizing artificial neural network technique allowing for an important reduction model dependency. consists such elements as feasibility studies, training networks with genetic algorithm careful...
We investigate the potentialities offered by study of lepton-pair production in ultraperipheral collisions at a fixed-target experiment using proton and ion LHC beams. In these collisions, exclusive or semi-exclusive can be used as luminosity monitor well check equivalent-photon approximation, via measurement Bethe-Heitler cross section. It also serve probe inner hadron structure azimuthal asymmetry which is sensitive to timelike virtual Compton scattering. briefly discuss possibility η c...
We calculate the leading order in $\alpha_s$ QCD amplitude for exclusive neutrino and antineutrino production of a $D$ pseudoscalar charmed meson on an unpolarized nucleon. work framework collinear approach where generalized parton distributions (GPDs) factorize from perturbatively calculable coefficient functions. include both $O(m_c)$ terms functions $O(M_D)$ mass term contributions heavy distribution amplitudes. emphasize sensitivity specific observables transversity quark GPDs.
Transverse momentum distributions and generalized parton provide a comprehensive framework for the three-dimensional imaging of nucleon nucleus experimentally using deeply virtual semi-exclusive exclusive processes.The advent combined high luminosity facilities large acceptance detector capabilities enables experimental investigation partonic structure hadrons with time-like probes, in complement to rich on-going space-like probe program.The merits benefits dilepton production channel...
We describe the architecture and functionalities of a C++ software framework, coined PARTONS, dedicated to phenomenology Generalized Parton Distributions. These distributions three-dimensional structure hadrons in terms quarks gluons, can be accessed deeply exclusive lepto- or photo-production mesons photons. PARTONS provides necessary bridge between models Distributions experimental data collected various production channels. outline specification framework practical needs, physical content...
We investigate the potentialities offered by study of J/psi exclusive photo-production in ultra-peripheral collisions at a fixed-target experiment using proton and lead LHC beams (generically denoted as AFTER@LHC) on hydrogen targets RHIC collider mode. compare expected counting rates both set-ups. Studying Single-Transverse-Spin Asymmetries (A_N) such process provides direct path to Generalised Parton Distribution (GPD) E_g(x,xi,t). evaluate precision A_N for realistic conditions with LHCb...
We update the leading order in $α_s$ QCD amplitude for deep exclusive neutrino and antineutrino production of a light meson on an unpolarized nucleon. The factorization theorems collinear approach allow us to write as convolution generalized parton distributions (GPDs) perturbatively calculable coefficient functions. study both pseudoscalar longitudinally polarized vector cases. It turns out that, contrarily electroproduction case, twist scattering amplitudes $π$ $ρ_L$ productions are...
A unique feature of generalised parton distributions is their relation to the QCD energy-momentum tensor. In particular, they provide access mechanical properties proton i.e. pressure and shear stress induced by its quark gluon structure. principle distribution can be experimentally determined in a model-independent way from dispersive analysis deeply virtual Compton scattering data through measurement subtraction constant. practice kinematic coverage accuracy existing experimental make this...
We calculate the amplitude for exclusive electroweak production of a pseudoscalar ${D}_{s}$ or vector ${D}_{s}^{*}$ charmed strange meson on an unpolarized nucleon, through charged current, in leading order ${\ensuremath{\alpha}}_{s}$. work framework collinear QCD approach where generalized gluon distributions factorize from perturbatively calculable coefficient functions. include both $O({m}_{c})$ terms functions and $O({M}_{D})$ mass term contributions heavy distribution amplitudes. show...