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 10 of 10 for “"scattering lengths"”.
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A quantum field theory for the interaction of pions and rhos
… using the generalized class of Rɛ gauges. Tree scattering lengths were calculated for pion-pion scattering and the values for the a₀⁰ and a₀² scattering lengths are found to be comparable with experiment. The one particle irreducible diagrams that contribute to the one loop corrections to the …
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Hadron -hadron scattering in lattice quantum chromodynamics
<p>Hadron-hadron and multi-hadron scattering calculations in fully dynamical, mixed-action Lattice Quantum Chromodynamics using the MILC gauge ensembles in a non-perturbative simulation are discussed. In particular, calculations of the pi+sum+, pi+xi 0, K+p, K+n, and K¯ 0xi0 scattering lengths …
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semiconducting carbon nanotube transistors: electron and spin transport properties
… at room temperature, and possibly very long spin-scattering lengths. This thesis will describe experiments to probe the charge-and spin-transport properties of long, clean individual SWNTs prepared by chemical vapor deposition and contacted by metal electrodes. A SWNT field-effect transistor …
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Quantum Monte Carlo simulations of electrons and holes
… covering three related areas: (1) elastic scattering of excitons, (2) thermodynamics of electron-hole plasmas, and (3) electrons confined in a quantum dot. Excitons are bound states of an electron and a hole, and obey Bose statistics. A low density exciton gas is an experimentally …
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Electronic transport in ropes of single wall carbon nanotubes
… no longer affected by the contacts. The dominant scattering mechanisms in the nanotubes could be identified to be impurity scattering (temperature independent, Limp » 10 mm) and electron-phonon scattering (linear in temperature, Lel-ph » 10 mm at 250 K). The enormous scattering lengths proof the …
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Adaptive wavefront correction in two-photon microscopy using Coherence-Gated Wavefront Sensing
… distortions can be sensed up to several scattering lengths deep within the specimen. Fast wavefront correction can be realized, allowing the measurement of a wavefront in less than 1 microsecond with an accuracy of lambda/50, even in strongly scattering samples. Furthermore, CGWS is …
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An analysis of K⁺-nucleon scattering
A partial-wave analysis of K⁺-nucleon scattering has been performed. Energy-dependent and energy-independent solutions for the isoscalar and isovector amplitudes are generated by fitting data with a chi-squared minimization technique. The isoscalar amplitudes extend to a K⁺ incident lab kinetic …
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Linear Sigma Models in QCD and S3 Symmetry for Neutrinos
… It is shown that the tree amplitude for ππ scattering in the minimal linear sigma model has an exact expression which induces an infinite geometric series in which the pattern for both the I = 0 and I = 2 s-wave scattering lengths to orders $p^2$, $p^4$ and $p^6$ seems to agree with chiral …
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Applications of two focus fluorescence correlation spectroscopy in colloid and polymer science
… Therefore, it is necessary to generate scattering contrast between the observed particles and the surrounding liquid phase. In static- and dynamic light scattering (SLS/DLS) experiments this contrast is usually created by the different refractive indices of sample and solvent, whereas in …
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Advancing Optical Lattice Clocks: Accurate Measurements on a Bosonic System and Development of a Hybrid Cavity-Lattice Clock
L'abstract è presente nell'allegato / the abstract is in the attachment