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 6 of 6 for “"Feynman Diagram"”.
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Feynman Diagram Models of Daughter Regge Trajectories
The Van Hove model of Regge poles is used to study daughter trajectories of bosons in scalar meson-scalar meson scattering and of fermions in backward pion-nucleon scattering. Both the simple model with bare propagators and a generalized model that includes propagator self-energy insertions are …
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Quark and Gluon Form Factors at Three Loops in Perturbative QCD
… vertex of a Higgs boson and two gluons. We use Feynman diagram methods to derive expressions for the form-factors in terms of tensor loop integrals in $D=4-2\epsilon$ dimensions. We review various methods for relating tensor integrals to a basis set of master integrals and utilize the FIRE …
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Inclusive pion production at large and small transverse momentum in a model of hadrons
… studied in a model of hadrons. The model has the Feynman diagram structure of the multiperipheral model. The off-shell hadron amplitudes are taken from field theoretic ideas, the relationship with electroproduction, factorization of off-shell behavior, a double offshell enhancing effect, and …
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Massive quark self-energy in cavity QCD
… greatest obstacle in calculating the self-energy Feynman diagram is that it is, in principle, linearly divergent. So far the self-energy of a massive quark in cavity quantum chromodynamics has only been calculated for the lowest cavity mode ls1/2. The methods used so far, have been based on the …
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Multidimensional Spectra from Classical trajectories
… through an identification between a double sided Feynman diagram (DSD) and a semiclassical diagram whose evaluation only requires propagation of quantized classical trajectories. Here we have extended the OMT approach to the treatment of two dimensional electronic spectroscopy (2DES) for systems …
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Exploring linear and nonlinear electromagnetic responses in topological materials
This dissertation serves to examine the linear and nonlinear electromagnetic response properties in topological materials.Topological materials tend to produce unique transport signatures that point to the underlying topology of its electronic energy bands.Furthermore, given the recent experimental …