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 17 of 17 for “"Small-x"”.
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Unintegrated Gluon Distributions at Small-x
… energies has prompted a large interest in the small-x regime of quantum chromodynamics where partons carry a small fraction of the momentum of their parent hadrons. In this regime gluon occupation numbers are believed to be very high leading to saturation of the corresponding parton densities. …
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Small-x QCD Calculations with a Biased Ensemble
<p>In this dissertation, I will argue that we can study functional fluctuations in unintegrated gluon distributions, in the MV model as well as JIMWLK, using reweighting techniques, which will allow me to calculate QCD observables with "biased ensembles". This technique will enable me to study rare …
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Some Aspects of Deeply Virtual Compton Scattering
… Compton amplitude in QCD on two examples: small-x physics accessible in the Regge regime and twist-3 approximation 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 …
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Finite kinematics in radiative energy loss
… model of radiative emissions. We find that the small-x kinematic constraints in the simpler theory are identical to those implemented in sophisticated QCD-based energy loss models, but that the exact large-x kinematics in the toy theory are more complicated than those implemented in those same …
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Measurement of Z Boson Transverse Momentum In Proton-Antiproton Collisions At sqrt(s)=1.96 TeV
… resummed form factor with modifications in the small-x region.
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Human-machine interaction for unmanned surface systems
… role. The human interfaces used by 67 Micro and Small X, Intermediate, Harbor, Fleet, and E,F,G-Class platforms were examined and it was determined that: i) the research literature does not well characterize the human roles present in unmanned surface systems, ii) domain complexity may …
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Gluon propagator in classical color field of colliding hadrons and its implications for hadronic cross sections
… the gg [rightwards arrow] gg sub-process in the small-x region. We show that the pp and pp total cross section from [square root]s = 5 GeV to 30 TeV can be described as a sum of a hard component contributed by the classical field modified minijet model and a soft component due to the exchange of …
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Untersuchung der ln (1/x) -Verteilung mit JADE-Daten bei 22-44 GeV
… this work is the Fong-Webber parametrisation. At small x the Fong-Webber parametrisation was performed by summing all divergences of the NLLA, one of the QCD computing approaches which uses all leading and next-to-leading logarithms in a given expansion parameter, for example in x. In agreement …
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Superior to one of Glass: Natural Gradient index Lenses via Patchy Particle Self-Assembly
… flexibility in bond angles. We conducted small x-ray scattering (SAXS) at different radial positions of the lens, and performed a Monte Carlo simulation to estimate structures consistent with the SAXS result. This analysis suggests that lens proteins may form a gel with gradient density …
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Oxygenates in iron Fischer-Tropsch synthesis : is copper a selectivity promoter?
… precipitated iron catalyst promoted with small amounts of potassium and copper is one of the catalysts used in this reaction. Precipitated iron catalysts are chemically promoted with potassium in order to enhance the product selectivity, while copper is added as a reduction promoter which …
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Nanofocusing Refractive X-Ray Lenses
… those of refractive lenses are given. To achieve small x-ray beams well beyond the 100nm range a small focal length is required. This is achieved in refractive lenses by moving to a compact lens design where several single lenses are stacked behind each other. The, so-called nanofocusing …
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Exploring and exploiting charge-carrier confinement in semiconductor nanostructures : heterodimensionality in sub-monolayer InAs in GaAs and photoelectrolysis using type-II heterojunctions
… oxygen-production potentials (respectively) for small x (x < 0.3), indicating an ability to split water.
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Synthesis and magnetic properties of novel Ln[subscript 2-x]MxCuO[subscript 4+y] compositions (Ln = La,Pr,Nd,Sm,Eu,Gd; M = Ca,Sr,Ba; 0<=x<=0.2; -0.5<=y<=0.5)
… it follows an exponential law with a small x-dependent spin-stiffness constant, where T[subscript]N is the magnetic ordering temperature. It is argued that the spin-lattice relaxation rate arises from fluctuations of the staggered magnetization in locally ordered mesoscopic domains. We …
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Response of Electrified Micro-Jets to Electrohydrodynamic Perturbations
… natural breakup of liquid jets originates from small ambient perturbations, which can grow exponentially until the amplitude as large as the jet radius is reached. For unelectrified inviscid jets, surface energy analysis shows that only the axisymmetric perturbation is possibly unstable, and …
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A Study of Magnetic Reconnection: From 2D Energy Release to 3D Spreading and Localization
… been suggested these structures are formed by a small X-line forming near the sun and spreading as the X-line convects away from the sun. Another possibility is the X-line is localized in a small region and the exhaust expands into the out-of-plane direction. Theoretical arguments and large-scale …
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Formation and characterization of zein-based oleogels
… self-assembly process were monitored by ultra-small x-ray scattering (USAXS). The results showed one to two levels of structures were formed inside zein-based oleogels. The primary level of zein building blocks with radius of gyration Rg1 and shape factor P1 revealed between high q and …
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Monte Carlo Analysis and Physics Characterization of a Novel Nanoparticle Detector for Medical and Micro-dosimetry Applications
… both (i) radiation therapy and (ii) preclinical small animal radio- biology studies are dependent on the delivery of a known quantity of radiation to a specific and intentional location. Adverse effects can result from these procedures if the dose to the target is too high or low, and can also …