A5068125473- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Optical Imaging and Spectroscopy Techniques
- Non-Invasive Vital Sign Monitoring
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Cognitive Abilities and Testing
- Cold Atom Physics and Bose-Einstein Condensates
- Particle accelerators and beam dynamics
- Dark Matter and Cosmic Phenomena
- Cognitive Functions and Memory
- Gas Dynamics and Kinetic Theory
- Advanced NMR Techniques and Applications
- Sleep and Wakefulness Research
- Educational and Psychological Assessments
- Electromagnetic Scattering and Analysis
- Quantum, superfluid, helium dynamics
- Musicology and Musical Analysis
- Hemodynamic Monitoring and Therapy
- Quantum Mechanics and Applications
Temple University
2016-2025
Temple College
2009-2024
Adam Mickiewicz University in Poznań
2022-2023
Brookhaven National Laboratory
2022-2023
University of Bonn
2022-2023
Argonne National Laboratory
2023
University of California, Los Angeles
2022
Center for Theoretical Biological Physics
2022
Stony Brook University
2022
Yale University
2022
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...
Universality in QCD factorization of parton densities, fragmentation functions, and soft factors is endangered by the process dependence directions Wilson lines their definitions. We find a choice that consistent with gives universality between e(+)e(-) annihilation, semi-inclusive deep-inelastic scattering, Drell-Yan process. only modified time-reversal transformation function densities other processes, whose effect known reversal sign for T-odd such as Sivers function. The modifications...
Recent work suggests nontrivial relations between generalized parton distributions on the one hand and (naive time-reversal odd) transverse momentum dependent other. Here we review present knowledge such type of relations. Moreover, as far spectator model calculations are concerned, existing results considerably extended. While various two types can be found in framework models, so no model-independent have been established.
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...
The distribution of linearly polarized gluons inside a large nucleus is studied in the framework color glass condensate. We find that Weizs\"acker-Williams saturates positivity bound at transverse momenta and suppressed small momenta, whereas dipole for any value momentum. also discuss processes which both distributions can be probed.
In this paper we present a comprehensive formalism for dilepton production from the collision of two polarized spin-$\tfrac{1}{2}$ hadrons by identifying general angular distribution cross section in combination with complete set structure functions. The various functions are computed parton model approximation where mainly consider case when transverse momentum pair is much smaller than its invariant mass. kinematical region can be described terms dependent distributions.
We study the transverse single-spin asymmetry for single-hadron production in proton-proton collisions within framework of collinear twist-3 factorization quantum chromodynamics. By taking into account contribution due to parton fragmentation, we obtain a very good description all high transverse-momentum data neutral and charged pion from Relativistic Heavy Ion Collider. Our may provide crucial step toward final solution long-standing problem what causes asymmetries hadronic show first time...
Different decompositions (sum rules) for the proton mass have been proposed in literature. All of them are related to energy-momentum tensor quantum chromodynamics. We review and revisit these by paying special attention recent developments with regard renormalization tensor. The connection between sum rules is discussed as well. present numerical results various terms up 3 loops strong coupling, consider their scheme dependence. also elaborate on role played trace anomaly sigma terms.
Traditionally, lattice QCD computations of generalized parton distributions (GPDs) have been carried out in a symmetric frame, where the transferred momentum is symmetrically distributed between incoming and outgoing hadrons. However, such frames are inconvenient since they require separate calculation for each value transfer, increasing significantly computational cost. In this work, by focusing on quasi-distribution approach, we lay foundation faster more effective calculations GPDs...
For the first time, we present a lattice QCD determination of Mellin moments unpolarized generalized parton distributions (GPDs) proton from an analysis quasi-GPD matrix elements within short-distance factorization framework. We perform our calculation on $N_f$=2+1+1 twisted mass fermions ensemble with clover improvement at spacing $a=0.093$ fm and pion $m_\pi=260$ MeV. Focusing zero-skewness case, iso-vector iso-scalar quasi-GPDs are calculated $\gamma_0$ definition, as well recently...
The feasibility of extracting generalized parton distributions (GPDs) from deeply virtual Compton scattering (DVCS) data has recently been questioned because the existence an infinite set so-called ``shadow GPDs'' (SGPDs). These SGPDs depend on process and manifest as multiple solutions (at a fixed scale ${Q}^{2}$) to inverse problem that needs be solved infer GPDs DVCS data. therefore pose significant challenge for With this motivation we study extent which QCD evolution can provide...
Recently, we made significant advancements in improving the computational efficiency of lattice QCD calculations for generalized parton distributions (GPDs). This progress was achieved by adopting matrix elements asymmetric frames, deviating from computationally-expensive symmetric frame typically used, and allowing freedom choice distribution momentum transfer between initial final states. A crucial aspect this approach involves adoption a Lorentz covariant parametrization elements,...
We perform the first global quantum chromodynamics (QCD) analysis of dihadron production for a comprehensive set data in electron-positron annihilation, semi-inclusive deep-inelastic scattering, and proton-proton collisions, from which we extract simultaneously transversity distributions nucleon π^{+}π^{-} fragmentation functions. incorporate our fits known theoretical constraints on transversity, namely, its small-x asymptotic behavior Soffer bound. furthermore show that lattice-QCD results...
The general parameterization of the quark-quark correlation function for a spin-1/2 hadron is considered. presence Wilson line ensuring color gauge invariance correlator induces structures that were not given explicitly in existing literature. In particular, form transverse momentum dependent entering various hard scattering processes derived. this case two new time-reversal odd parton distributions appear at twist-3 level.
The Sivers function is extracted from HERMES data on single spin asymmetries in semi-inclusive deeply inelastic scattering. Our analysis use a simple Gaussian model for the distribution of transverse parton momenta, together with flavor dependence given by leading $1/{N}_{c}$ approximation and neglect antiquark distribution. We find that within errors these approximations are sufficient.
It is shown that intrinsic transverse parton momenta ${p}_{T}$ in semi-inclusive deep-inelastic scattering (SIDIS) and the Drell-Yan process (DY) are very well consistently described Gauss model with energy-dependent Gaussian widths. Our work solidifies basis for future studies of ${p}_{T}$-effects. We also discuss Cahn Boer-Mulders effect SIDIS DY.
Continuous-wave near-infrared spectroscopy and imaging enable tissue hemodynamics oxygenation to be determined non-invasively. Movements of the investigated subject can cause movement artifacts (MAs) in recorded signals. The strength type MAs induced depend on measurement principle. aim present study was investigate quantitative relationship between different single-distance (SD) multi-distance (MD) methods their susceptibility MAs. We found that each method induces a degree, MD are more...
We investigate the behavior under Lorentz transformations of perturbative coefficient functions in a collinear twist-3 formalism relevant for high-energy observables including transverse polarization hadrons. argue that those can, priori, acquire quite different yet Lorentz-invariant forms various frames. This somewhat surprising difference can be traced back to general dependence on light cone vectors which are introduced by factorization formulas and frame-dependent. One remove this...
Generalized transverse momentum dependent parton distributions (GTMDs) are the most general correlation functions of hadrons. By considering exclusive double Drell-Yan process it is shown for first time how quark GTMDs can be measured. Specific addressed by means polarization observables.