A5077582232- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Advanced Measurement and Detection Methods
- Astrophysical Phenomena and Observations
- Optical Systems and Laser Technology
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Advanced Optical Sensing Technologies
- Radiation Detection and Scintillator Technologies
- Simulation and Modeling Applications
- Infrared Target Detection Methodologies
- Galaxies: Formation, Evolution, Phenomena
- Dark Matter and Cosmic Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Distributed and Parallel Computing Systems
- Heat Transfer Mechanisms
- Quantum and electron transport phenomena
- Particle Accelerators and Free-Electron Lasers
Lawrence Berkeley National Laboratory
2016-2025
Beijing University of Technology
2025
Nanjing Foreign Language School
2025
University of Tübingen
2024-2025
Shandong University
2009-2024
Tsinghua University
2015-2024
Xi'an Jiaotong University
2024
Hubei University of Technology
2024
China Jiliang University
2023-2024
University of Bonn
2024
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 argue a factorization formula for semi-inclusive deep-inelastic scattering with hadrons in the current fragmentation region detected at low transverse momentum. To facilitate factorization, we introduce transverse-momentum dependent parton distributions and functions gauge links slightly off light cone, soft-gluon radiations subtracted. verify to one-loop order perturbative quantum chromodynamics that it is valid all orders perturbation theory.
We systematically study dijet production in various processes the small-$x$ limit and establish an effective ${k}_{t}$-factorization for hard a system with dilute probes scattering on dense target. find that well-known Weizs\"acker-Williams gluon distribution can be directly probed quark-antiquark jet correlation deep inelastic dipole measured direct photon-jet $pA$ collisions. In large-${N}_{c}$ limit, unintegrated distributions involved other different channels collisions are shown to...
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)...
We study the transverse momentum dependent (TMD) evolution of Collins azimuthal asymmetries in $e^+e^-$ annihilations and semi-inclusive hadron production deep inelastic scattering (SIDIS) processes. All relevant coefficients are calculated up to next-to-leading logarithmic (NLL) order accuracy. By applying TMD at approximate NLL Collins-Soper-Sterman (CSS) formalism, we extract transversity distributions for $u$ $d$ quarks fragmentation functions from current experimental data by a global...
This paper presents a comprehensive review of both the theory and experimental successes Quantum Chromodynamics, starting with its emergence as well defined in 1972-73 following developments results up to present day. Topics include earliest theoretical foundations; fundamental constants QCD; an introductory discussion lattice QCD, only known method for obtaining exact predictions from methods approximating special focus on effective field theories; QCD under extreme conditions; measurements...
Abstract Polymer dielectrics with high breakdown strength ( E b ) and efficiency are urgently demanded in advanced electrical electronic systems, yet their energy density U e is limited due to low dielectric constant (ε r loss at elevated temperatures. Conventional inorganic fillers diameters from nano micrometers can only increase ε the cost of compromised poor compatibility polymer matrix. Herein, hydroxyapatite (HAP) sub‐nanowires a diameter ≈0.9 nm incorporated polyetherimide (PEI)...
Based on a recent work the quantum chromodynamic (QCD) factorization for semi-inclusive deep-inelastic scattering (DIS), we present set of formulas spin-dependent DIS and Drell-Yan cross sections at low transverse momentum.
We develop the concept of quantum phase-space (Wigner) distributions for quarks and gluons in proton. To appreciate their physical content, we analyze contraints from special relativity on interpretation elastic form factors, examine physics Feynman parton proton's rest frame. relate quark Wigner functions to transverse-momentum dependent generalized distributions, emphasizing role skewness parameter. show that allow visualize using language classical phase space. present two examples point...
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 calculate inclusive hadron productions in pA collisions the small-x saturation formalism at one-loop order. The differential cross section is written into a factorization form coordinate space next-to-leading order, while naive of convolution transverse momentum does not hold. rapidity divergence with dipole gluon distribution nucleus factorized energy evolution function, which known as Balitsky-Kovchegov equation. Furthermore, collinear divergences associated incoming parton nucleon and...
Using lepton-pair production in hadron-hadron collisions as an example, we explore the relation between two well-known mechanisms for single-transverse-spin asymmetries hard processes: twist-three quark-gluon correlations when pair's transverse momentum is large, q perpendicular >> Lambda QCD, and time-reversal-odd transverse-momentum-dependent parton distributions much less than mass. We find that, although each have their own domain of validity, they describe same physics kinematic region...
We study the single-spin (left-right) asymmetry in single-inclusive pion production hadronic scattering. This is power-suppressed transverse momentum of produced and can be analyzed terms twist-three parton correlation functions proton. present new calculations corresponding partonic hard-scattering that include so-called ``nonderivative'' contributions not previously considered literature. find a remarkably simple structure results. also brief phenomenological spin asymmetry, taking into...
We demonstrate the QCD factorization for inclusive hadron production in p-A collisions saturation formalism at one-loop order, with explicit calculation of both real and virtual gluon radiation diagrams. In particular, we find that cross section can be written into a form coordinate space next-to-leading while naive convolution transverse momentum does not hold. The collinear divergences associated incoming parton distribution nucleon outgoing fragmentation function final-state hadron, as...
We study single-spin asymmetries in semi-inclusive deep inelastic scattering with transversely polarized target. Based on the QCD factorization approach, we consider Sivers and Collins contributions to asymmetries. fit simple parameterizations for functions recent HERMES data, compare results from COMPASS. Using fitted functions, predict single transverse spin various processes $pp$ collisions at RHIC, including Drell-Yan process angular correlations dijet jet-plus-photon production. These...
Two widely proposed kt-dependent gluon distributions in the small-x saturation regime are investigated using two particle back-to-back correlations high energy scattering processes. The Weizsacker-Williams distribution, interpreted as number density of inside nucleus, is studied quark-antiquark jet correlation deep inelastic scattering. On other hand, unintegrated defined Fourier transform color-dipole cross section, probed direct photon-jet pA collisions. Dijet-correlation collisions...
In this manuscript, we present a complete study of the Sudakov double logarithms resummation for various hard processes in $eA$ and $pA$ collisions small-$x$ saturation formalism. We first employ couple slightly different formalisms to perform one-loop analysis Higgs boson production process collisions, demonstrate that Sudakov-type arise as leading correction they can be systematically resummed addition usual resummation. further other such heavy quark pair back-to-back dijet through...
We investigate the quark orbital angular momentum of nucleon in absence gauge-field degrees freedom, by using concept Wigner distribution and light-cone wave functions Fock-state expansion nucleon. The is obtained from phase-space average operator weighted with unpolarized quarks a longitudinally polarized also derive wave-function representation momentum. In particular, we perform an space decompose into $N$-parton state contributions. Explicit expressions are presented terms three-quark...
We investigate the close connection between quantum phase space Wigner distribution of small-$x$ gluons and color dipole scattering amplitude, propose to study it experimentally in hard diffractive dijet production at planned electron-ion collider. The angular correlation nucleon recoiled momentum transverse will probe nontrivial distribution. This experimental not only provide us with three-dimensional tomographic pictures inside high energy proton, but also give a unique interesting signal...
We show that the linearly polarized gluon distributions appear in color dipole model as we derive full cross sections of DIS dijet production and Drell-Yan ($\gamma^*$ jet correlation) process. Together with normal Weizs\"acker-Williams distribution, one will contribute to section coefficient $\cos(2 \Delta \phi) $ term correlation limit. also exact results for process, find distribution which is identical involves section. The obtained this paper agree previous transverse momentum dependent...
Leading and subleading-twist transverse momentum dependent parton distribution functions (TMDs) are studied in a quark-model framework provided by the bag model. A complete set of relations among different TMDs is derived, question discussed how model (in)dependent such are. connection pretzelosity quark orbital angular derived. Numerical results presented, applications for phenomenology discussed. In particular, it shown that valence-$x$ region supports Gaussian Ansatz dependence TMDs.