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.
Results
Showing 1 to 19 of 19 for “"radiative corrections"”.
-
Radiative Corrections to Low Energy Theorems
… a model-independent way, the soft virtual photon radiative corrections to an arbitrary hadronic process. It is shown that all the results concerning infrared divergences obtained within the theory of quantum electrodynamics of the electron-photon system are, in fact, exact in strong interactions. …
-
An Approach to Thermocouple Temperature Measurements that Reduces Uncertainties Associated with Radiative Corrections
… is extremely challenging due to the effects of radiative heat loss. These losses are difficult to quantify and often cannot be corrected for or minimized without sacrificing spatial resolution. In this work, a new experimental methodology is presented that has shown potential to minimize the …
-
Radiative Corrections to and Connections Among Theories With Lorentz Violation and Time-Varying Couplings
… Lagrangian is considered. The leading quantum corrections in this theory are computed, showing the renormalizability of the theory at the leading order. In the pure scalar sector, the calculations can be generalized to higher orders and to include finite terms, because the theory can be solved …
-
Møller scattering at low energy
… energies. In this thesis, existing soft-photon radiative corrections were combined with new hard-photon bremsstrahlung calculations to take into account the effect of photon emission at any photon energy. The electron mass was included at all steps. The radiative corrections were compiled into a …
-
A Measurement of the Proton Weak Magnetic Form Factor (G(m)(z)) at Q(2)=0.1 GeV(2)/c(2)
… uncertainty in theoretical calculations of weak radiative corrections. The strange quark contribution to the proton magnetic form factor GsM has been determined from the weak magnetic form factor. After applying model dependent radiative corrections, the value determined is GsMQ2=0.1G …
-
A precision measurement of the e⁺p/e⁻p elastic scattering cross section ratio at the OLYMPUS experiment
… to elastic electron-proton scattering in the radiative corrections applied to the Rosenbluth separation measurements. Calculations of the hard TPE contribution are highly model dependent, but the effect may be measured experimentally with a precise determination of the ratio of the …
-
Quantum Electrodynamic Bound-State Calculations and Large-Order Perturbation Theory. - (This manuscript is also available - in the form of a book - from Shaker Verlag GmbH, Postfach 101818, 52018 Aachen, Germany world-wide web address: http://www.shaker.de, electronic-mail address: info@shaker.de. It has been posted on the web sites of Dresden University of Technology with the permission of the publisher.)
… calculation of atomic spectra, including radiative corrections, is one of the rather challenging tasks in theoretical physics. The entire formalism of quantum (gauge) field theory, augmented by the difficulties of the bound-state formalism, is needed for an accurate understanding of the …
-
The application of automated perturbation theory to lattice QCD
… and numerical methods to extract the one-loop radiative corrections to the higher order kinetic operators in the NRQCD action. I then employ a fully automated procedure to calculate the heavy quark energy shift at two-loops. I use this result to extract a new prediction of the mass of the b …
-
Three loop corrections to electroweak precision observables in the large Higgs mass limit
… tested at the level <br>of quantum corrections by precise measurement of several observables. <br>The direct observation of the predicted top quark at the proton-antiproton <br>collider Tevatron at Fermilab in 1994 with a mass determination <br>(now at m_t= 174.3+- 3.4 GeV) that …
-
The anomalous magnetic moment of the nucleon in cavity QCD
… to the familiar Feynman rules in free space. All corrections to order eg² in the electromagnetic and strong coupling constants which contribute to the magnetic moment of a baryon are generated using this formalism. The O(eg²) radiative corrections to the magnetic moment of the nucleon are …
-
Precision Measurement of the Spin Structure of the Proton and the Deuteron
… and statistically sound approach to calculating radiative corrections was developed, providing well-defined statistical errors for the E155 data set. Also, a comprehensive fit to the global data set was created which simultaneously describes all existing data on p, d and n ( <sup>3</sup>He) …
-
Measuring the lepton sign asymmetry in elastic electron-proton scattering with OLYMPUS
… The first stage in the simulation was new radiative event generator, which permitted the full simulation of the non-trivial radiative corrections to the measurement. The analysis of the data and simulation showed that the lepton sign asymmetry rises by several percent between a momentum …
-
A measurement of the two-photon exchange effect in elastic electron-proton scattering with OLYMPUS
… is the unaccounted two-photon exchange radiative correction, which could affect the unpolarized measurements. As this effect is currently not possible to calculate in a model-independent way, the OLYMPUS experiment was designed to make a direct measurement of it by measuring the elastic …
-
Precision theory for LHC/FCC : new results for the five point function and interface between KKMC-hh and MG5_aMC@NLO.
… 1% theoretical precision tag, we have to take radiative corrections into account and develop more precise Monte Carlo generators. In this dissertation, we first developed the computer realization of the magic spinor product method in loop integrals proposed by B. F. L. Ward to evaluate the …
-
Monte Carlo simulations using infrared improved DGLAP-CS theory.
… to uncover new physics which may appear through radiative corrections or through new tree level processes with suppressed couplings. In order to reach the 1% attendant theoretical precision tag on processes such as single Z and W production, more precise Monte Carlos need to be developed. As a …
-
Quantum electrodynamics and fundamental constants
… theoretical approaches for the evaluation of QED corrections are presented and discussed. Due to the presence of two energy scales from the binding potential and the radiation field, an overlapping parameter has to be used in both the approaches in order to separate the energy scales. The …
-
Parity-Violating Elastic Electron Nucleon Scattering: Measurement of the Strange Quark Content of the Nucleon and Towards a Measurement of the Weak Charge of the Proton
… theoretical work has shown that higher order radiative effects, such as two photon exchange, may be able to explain discrepancies between experiments which measure the ratio of the electric and magnetic form factors of the proton. The measurement of the transverse or beam normal single spin …
-
Spontaneous CP-Violation in Two Higgs Doublet Supersymmetric Models
An alternative approach to the problem of CP-violation is presented. It is based on the possibility of spontaneous CP-breakdown in models with two Higgs doublets. General features of the phenomenon such as stability of the vacuum and the existence of a light axion are discussed. We investigate the …