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Showing 1 to 20 of 23 for “"nucleon structure"”.
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Spin dependent nucleon structure at intermediate Q²
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
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Nucleon structure and Its modification in nuclei
… targets are an important tool for studying the structure of the nucleons. The electromagnetic structure of the proton, as encapsulated by its elastic form factors, can be extracted through measurements of the elastic electron-proton scattering cross-section. The GMp experiment in Hall A at the …
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An experimental study of the nucleon structure functions.
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1973. Ph.D.
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Exploration of nucleon structure in lattice QCD with chiral quarks
In this work, we calculate various nucleon structure observables using the fundamental theory of quarks and gluons, QCD, simulated on a lattice. In our simulations, we use the full QCD action including Nf = 2+ 1 dynamical quarks in the SU(2) isospin limit. We compute the nucleon vector and axial …
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Disentangling the EMC effect: from free to bound nucleon structure
… on fixed targets allow for the study of the structure of nucleons. While the structure of the free proton has been well measured, the free neutron structure and the modification of nucleon structure in the nuclear environment, the EMC effect, remain open questions. Studies suggest that the …
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Fragmentation and nucleon structure in semi-inclusive deep-inelastic scattering at the HERMES experiment
… enhance our understanding of the proton structure, as well as the fragmentation process in deep-inelastic scattering. Furthermore, the 3D binning at an unprecedented level of precision provides a handle to help disentangle the transverse momentum structure of both. The high level of …
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Transverse momentum dependent nucleon structure from pions impinged on a transversely polarized proton target
The transverse momentum structure of the nucleon generalizes the 1-dimensional parton distribution functions (PDFs) to a 3-dimensional description. The extended distributions are called transverse momentum dependent (TMD) parton distribution functions. TMD functions include transverse quark and …
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On Extracting Hadron Multiplicities and Unpolarized Nucleon Structure Ratios From SIDIS Data at the HERMES Experiment
… distribution functions (PDFs) inside the nucleon via the flavor tagging technique within the quark-parton model. In particular, one can exploit certain factorization assumptions and fragmentation symmetries to extract the valence quark ratio dv/ uv and the light sea asymmetry d -- u/(u -- …
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Field Theoretic Models of Deep Inelastic Lepton-Nucleon Scattering
… asymptotic behavior of the inelastic electron-nucleon structure functions within the framework of ladder models of the virtual Compton amplitude in the limit |q<sup>2</sup>|→ ∞ with w=2q·p/|q<sup>2</sup>| large and fixed. (q is the electron four-momentum transfer and p the target nucleon …
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High precision measurement of the proton elastic form factor ratio at low Q²
… at this region. Beyond the intrinsic interest in nucleon structure, the new results also have implications in determining the proton Zemach radius and the strangeness form factors from parity violation experiments.
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Neutron Structure Functions Measured with Spectator Tagging
… fraction <em>x.</em> The Barely Off-shell NUcleon Structure (BONUS) experiment at Jefferson Lab addressed this problem by tagging spectator protons in coincidence with inelastic electron scattering from deuterium. A novel compact radial time projection chamber was built to detect …
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Exclusive π- Electro-Production From the Neutron in the Resonance Region
… resonances is crucial to our understanding of nucleon structure. Although the excited states of the proton have been studied in great detail, there are very few data available for the neutron resonances because of the difficulty inherent in obtaining a free neutron target. To overcome this …
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Proton Compton scattering with polarized γ rays
… Compton scattering is an important probe of the nucleon structure and its excited states. Polarization degrees of freedom reveal more information than unpolarized observables. This experiment measured, for the first time, the polarized cross sections of proton Compton scattering up to the Δ …
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Exploring QCD Factorization at Moderate Energy Scales
… much experimental research in areas such as nucleon structure and quark-hadron duality occur at more moderate energy scales where that basic assumption may not be true but perturbative calculations should still be useful. Thus, an exploration of the limits of factorization at more moderate …
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Simulation and Development of the Radial Time Projection Chamber for the BONuS12 Experiment in CLAS12
<p>Knowledge of the structure of nucleons (i:e: protons and neutrons) is a central topic of interest to nuclear/particle physicists. Much more is known about the structure of the proton than the neutron due to the lack of high-density free neutron targets. The Barely Off-shell Nucleon Structure …
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Spectator Proton Detection and Reconstruction in Deep Inelastic <i>D(E,EP<sub>S</sub>)</i> Scattering
… Hall B as part of the BONuS12 (Barely Off-shell Nucleon Structure) experiment. The goal of BONuS12 is to accurately measure the structure function of the neutron by scattering 11 GeV electrons and detecting them with the CLAS12 spectrometer. Deuterium gas was used as an effective neutron target, …
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Neutrino-nucleus neutral current elastic interactions measurement in MiniBooNE
… in turn, allow to improve the knowledge of nucleon structure. This thesis is devoted to the study of NCE interactions. Neutrino-nucleus neutral current elastic scattering accounts for about 18% of all neutrino interactions in MiniBooNE. Using a high-statistics, high purity sample of NCE …
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Exclusive Backward-Angle Omega Meson Electroproduction
… forward-angle meson electroproduction studies on nucleon structure. This work is a pioneering study of backward-angle omega cross sections through the exclusive 1H(e, e′ p)omega reaction using the missing mass reconstruction technique. The extracted cross sections are separated into the transverse …
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Exploring the quark-gluon content of hadrons: from mesons to nuclear matters
… state of the art lattice QCD calculations of nucleon form factors to the physical regime using phenomenological models of nucleon structure. Finally, we further developed the Quark Meson Coupling model for describing atomic nuclei and nuclear matter, where the quark-gluon structure of nucleons …
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Measurement of Generalized GDH Integrand for the Neutron and 3He at Low Q2
… quarks and gluons, the nuclear forces, and the nucleon mass and structure, still remain in the non-perturbative regime. Dispersive sum rules, based on universal principles, provide a data-driven approach to study the nucleon structure without model-dependencies. Among those sum rules, the well …
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