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Showing 1 to 20 of 25 for “"parton distributions"”.

  1. Exclusive Production of Quarkonia and Generalized Parton Distributions

    Koempel, John PaulTemple University. Libraries2015

    … Utilizing the framework of Generalized Parton Distributions enables predictions to be made if some information on them is known. We investigated exclusive photo and electroproduction of heavy vector mesons (the quarkonia J/ψ and ϒ), which can give access to the currently poorly …

    temple Repository record

  2. Parton Distributions in Beyond the Standard Model Theories

    Moore, JamesUniversity of Cambridge2023

    Parton distributions are a key ingredient of precise predictions for collider experiments. They are usually determined from fits to experimental data under the assumption that the Standard Model (SM) of particle physics is complete; however, this can bias studies of beyond the Standard Model (BSM) …

    cambridge Repository record

  3. Measurement of polarized parton distributions with spin-dependent deep-inelastic scattering

    Tipton, Bryan EMassachusetts Institute of Technology1999

    Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.

    mit Repository record

  4. Probing parton distributions in proton using Drell-Yan and charmonium production in p + p and p + d interactions with 120 GeV proton beam at Fermilab

    Leung, Ching HimUniversity of Illinois at Urbana-Champaign2024

    Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms

    uiuc Repository record

  5. Probing parton distributions in proton using Drell-Yan and charmonium production in p + p and p + d interactions with 120 GeV proton beam at Fermilab

    Leung, Ching HimUniversity of Illinois at Urbana-Champaign2024

    Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms

    uiuc Repository record

  6. Exploring proton structure using lattice QCD

    Renner, Dru Bryant, 1977-Massachusetts Institute of Technology2004

    We calculate moments of the generalized parton distributions of the nucleon using lattice QCD. The generalized parton distributions determine the angular momentum decomposition of the nucleon and the transverse distributions of partons within the nucleon. Additionally, the generalized parton …

    mit Repository record

  7. Inclusive and Exclusive Compton Processes in Quantum Chromodynamics

    Psaker, A.2019

    … analyze the process in the framework of the QCD parton model, in which the usual parton distributions emerge as a tool to describe the nucleon in terms of quark and gluonic degrees of freedom. To study its exclusive version, a new class of phenomenological functions is required, namely, …

    odu Repository record

  8. Virtual Compton Scattering Processes in Quantum Chromodynamics

    Musatov, Igor V.2019

    … processes require a generalization of usual Parton distributions for the case when long-distance information is accumulated in nonforward matrix elements [special characters omitted] of quark and gluon light-cone operators. We consider different aspects of the investigation of the virtual …

    odu Repository record

  9. Some Aspects of Deeply Virtual Compton Scattering

    Kuchina, Elena2019

    … in the description of DVCS through the general parton distributions. Using this model, we give an estimate for the cross section of deeply virtual Compton scattering for the kinematics of CEBAF at Jefferson Lab.</p>

    odu Repository record

  10. A Measurement of Nucleon Quark Spin Distributions at HERMES

    Bains, Balijeet SinghUniversity of Illinois at Urbana-Champaign2015

    … From the quark polarizations, polarized parton distributions are extracted, and first and second moments calculated.

    uiuc Repository record

  11. Measurement of the Deeply Virtual Neutral Pion Electroproduction Cross Section off the Proton at 10.6 GeV using the CLAS12 Detector

    Johnston, RobertMassachusetts Institute of Technology2023

    … has unique access to the chiral odd Generalized Parton Distributions, and is also a background for other exclusive processes such as Deeply Virtual Compton Scattering, making the determination of this cross section crucial for other exclusive analyses.

    mit Repository record

  12. Charge Symmetry Violation Quark Distributions via Precise Measurement of π+/π− Ratios in Semi-inclusive Deep Inelastic Scattering

    Jia, ShuoTemple University. Libraries2022

    Charge symmetry in the nucleon parton distributions assumes the distribution of quarks in the proton are related to those in the neutron. Indirect experimental evidence constrains Charge Symmetry Violation (CSV) to be less than 9%. In Quantum Chromo-Dynamics (QCD), charge symmetry is broken by the …

    temple Repository record

  13. Measurements of Dijet Cross Sections in Diffractive Photoproduction and Deep-Inelastic Scattering at HERA

    Schätzel, SebastianUniversität Heidelberg

    … by model predictions based on diffractive parton distributions obtained in inclusive diffractive DIS. The measurements are compatible with QCD and Regge factorisation. The gap survival probability in diffractive dijet photoproduction relative to the same process in DIS is determined to be …

    heid-diss Repository record

  14. Perturbative renormalization of proton observables in lattice QCD using domain wall fermions

    BistroviÄ , BojanMassachusetts Institute of Technology2005

    … elements determine form factors and general parton distributions. Due to the Minkowskian nature of these matrix elements, they cannot be evaluated on a Euclidean lattice so one uses the operator product expansion to calculate matrix elements ... which specify moments of these distributions. …

    mit Repository record

  15. Triple Coincidence Beam Spin Asymmetry Measurements in Deeply Virtual Compton Scattering

    Canan, Mustafa2019

    <p>The Generalized Parton Distributions (GPDs) provides hitherto the most complete information about the quark structure of hadron. GPDs are accessible through hard-exclusive reactions, among which Deeply Virtual Compton Scattering (DVCS) is the cleanest reaction. A dedicated DVCS experiment on …

    odu Repository record

  16. Finite-temperature quantum field theory and the structure functions of the nucleon

    Joubert, JeanDepartment of Physics1992

    … of features which are absent in the parton model. These include the presence of identical quarks and gluons in initial and final states and of quantum statistical correlations which have a role to play in the propagation of particles when considering Feynman diagrams containing …

    cape-town Repository record

  17. Electroproduction of Phi(1020) Mesons at High Q² with CLAS

    Santoro, Joseph PeterVirginia Tech2004

    … model described by Generalized Parton Distributions of 1/Q⁶. The differential cross section dσ/dφ was used to determine that the s-channel helicity conservation (SCHC) assumption is valid within the precision of the current data. SCHC leads to a simple expression for the decay …

    vt Repository record

  18. Deeply Virtual Compton Scattering at Hall A, Jefferson Lab

    Hashir Rashad, Mohamed Nuhman2021

    … hence help fill in the gaps of QCD. Generalized Parton Distributions (GPDs) provide simultaneous information of both spacial and longitudinal momentum distributions of constituents of a quark-gluon system. Deeply Virtual Compton Scattering (DVCS) is understood to be the simplest and cleanest …

    odu Repository record

  19. Measurement of the Deeply Virtual Compton Scattering Cross Section from the Proton at 10.6 GeV using the CLAS12 Detector

    Lee, SangbaekMassachusetts Institute of Technology2022

    … section enables the study of the Generalized Parton Distributions (GPD), which plays a central role in understanding the QCD dynamics inside a hadron. Thus, the quark and gluon origin of the nucleon spin and mass can be probed and three-dimensional images of the target nucleon or nucleus can …

    mit Repository record

  20. Photoproduction of π0 on Hydrogen With CLAS From 1.1 GeV - 5.45 GeV Using e+e –γ Decay

    Kunkel, Michael C.2019

    … and <em>dσ</em>/<em>dt</em>. The angular distributions agree well with the SAID parametrization for incident beam energies below 3 GeV. As a result with this new data, the χ<sup>2</sup>/<em>p.d.f.</em> of the global fit in the SAID parametrization improved to 3.1 from 3.7. For incident …

    odu Repository record

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