Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"Short-range correlations"”.
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Two-nucleon short-range correlations in light nuclei
… predict significantly different behaviors at short distances and high momenta (scale-and-scheme dependence), where two-nucleon Short-Range Correlations (SRCs) dominate the nuclear wave function. Thus, SRCs are a unique tool to constrain the NN interaction and vice versa. SRCs are …
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Searching for short range correlations using (e,e'NN) reactions
… (MEC) dominate the cross sections and the short range properties of the NN pair were substantially undermined. However, the node of the S state wave function of the pp pair at around 400 MeV/c initial momentum starts to be recognizable in the 4.461 GeV data. The data and the theory suggest …
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Across the Scales of the Nucleus: Understanding Short Range Correlations from Medium Modification to Probe Independence
… (QCD) that govern its structure. The range of scales involved is remarkable; the most massive nuclei weigh approximately five orders of magnitude more than the quarks that compose them. The nucleus can be analyzed at various levels, from quarks to hadrons to the nucleus as a whole. …
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Measurements of Correlated Pair Momentum Distributions in -3He(e,e',p,p)n with CLAS
<p>Nucleon-Nucleon (NN) Short Range Correlations (SRC) represent a valuable part of the nuclear wave function. Improved knowledge of SRC will give us a better understanding of nuclear matter and nuclear interactions in extreme conditions. A study of the effects of short-range correlations using the …
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Theory of Alpha-Nucleus Collisions at High Energies
… are developed and used to study the effects of short-range correlations in nuclear scattering. The Jastrow method is used to model the two-particle density for <sup>4</sup>He and to construct one and two particle form factors. Excellent agreement with experimental data for angular distributions, …
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Disentangling the EMC effect: from free to bound nucleon structure
… nucleon-nucleon systems, referred to as short-range correlations. The BAND experiment at the Thomas Jefferson National Accelerator Facility seeks to probe the bound proton structure when in a strongly-interacting state, using spectator-tagged deep inelastic scattering. This thesis …
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Spectral properties of strongly correlated electron systems
… broken symmetry. Our method accounts for both short-range correlations and long-range order. Short-range correlations are accurately taken into account via the exact diagonalization of finite clusters. Long-range order is described by variational optimization of a ficticious symmetry-breaking …
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Nucleon structure and Its modification in nuclei
… that the EMC effect may arise due to nucleon Short Range Correlations (SRC). This thesis describes studies of the elastic proton form factor measured in the GMp experiment at Hall A of JLab and studies of the EMC effect in nuclei relative to deuterium using data collected at the CLAS detector …
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Cluster mean-field dynamics of the long-range interacting Ising chain
In this thesis we study the dynamics of the long-range interacting Ising chain using a cluster mean-field approach, a mean-field theory that accounts for short range correlations. The principal result is that, if the system is isolated from an external environment, the model exhibits two different …
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Two body rapidity correlations in pi-p interactions at 147 GeV/c
… inclusive and semi-inclusive two body rapidity correlations for 11 p interactions at 147 GeV/c. Strong short range correlations are seen for particles of opposite sign, while a ""Bose-Einstein"" effect is seen for like sign particles. It is found that the opposite sign correlations are …
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Improving the Dispersive Optical Model toward a Dispersive Self-energy Method
… be improved. For example, a better treatment of short-range correlations is needed, and explicitly including the nonlocality of the imaginary potential appears to be necessary for particle number conservation. Comparison of the dispersive optical potential with microscopic calculations of the …
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Exploring the limits of a hadronic picture of nuclei through pion and nucleon removal reactions
… for the color transparency (CT) phenomenon and short-range correlations (SRC) in the nucleus. Results are presented for kinematics corresponding to completed experiments for A(gamma,pi -p), A(e, e’ pi+) and A(gamma, pp). The influence of CT and SRC on the nuclear transparency is studied. Both …
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An Exploration of Bonding in V_1−x Mo_x O_2 (x ≤ 0.53) and Other Compounds
… that strong metal--metal bonding enhances short-range correlations in the rutile phase while suppressing long-range correlations in the low-temperature phases, which is also accompanied by the suppression of the transition temperature and magnitude of the lattice anomaly. Together, these …
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Investigation of structural changes in vanadium containing transition metal oxides
… to a 2D variant of the M2 phase results in long-range structural correlations along symmetry-equivalent (11L) planes of the tetragonal rutile structure, yet extremely short-range correlations transverse to these planes. Additionally, we report a combined study using single crystal X-ray …
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Localization and spreading of matter waves in disordered potentials
… model is characterized by the presence of both short and long range correlations. We study the localization properties of the model and highlight the role played by short and long range correlations in the determination of those properties. In particular we show that when short-range …
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Application of the Statistical Energy Landscape Theory to Protein Structure Prediction
… and Wolynes by taking into account correlations in the energy landscape. For the self-consistent energy function used in threading, alignments are comparable to those obtain by evolutionary distance-based alignments and consistently appear to be more accurate for sequences that have …
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Study of the ¹²C(e,e'p) reaction in a correlations dominant regime with Q² = 2.0 (GeV/c)² and XB̳ > 1
This experiment was motivated by studying short-range nucleon-nucleon correlations via multinucleon knockout reactions -- (e, e'pN). The data were taken in Hall A at Jefferson Lab using the pair of high resolution spectrometers to detect the (e, e'p) reaction data, and using a third large …
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Enhanced light-atom interaction in an optical resonator
… conditional signal power changes over a large range of 30 (by factor between 0.1 and 3.2), and phase shift up to [pi]/2, induced by measurements in different ancilla bases. The highest power gain of 3.2 is achieved with a success probability of 3%. The method allows one to modify or boost a …
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Shining a Light on the Nucleus: Photonuclear Measurements from Correlations to Charmonium
… impactful fraction are in configurations called “Short-Range Correlations” (SRCs), in which they pair with another nucleon at very short distance to experience strong interactions, significant binding, and high momentum. Hard, high-energy scattering reactions in which an SRC pair is broken apart, …
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Exploring Quantum Phenomena in 2D Materials: From Valley Topology and Exciton Selection Rules to Tuning Magnetic Correlations
… calculations, we show that monolayer Nb₃Cl₈ has short-range antiferromagnetic correlations among Nb₃ trimers with S = 1/2, and becomes magnetically frustrated due to the underlying effective triangular lattice geometry, and is evidenced by a frustration index of f > 1. The high-temperature …
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