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1	Direct measurement of the top-quark decay width with the ATLAS detector Dado, Tomas 12 June 2019 (has links) No description available. 530 Physik (PPN621336750)
2	Studium časového vývoje metastabilních stavů v kvantové mechanice / Study of time evolution of metastable states in quantum mechanics Gedeonová, Hedvika January 2019 (has links) In this thesis, the metastable states are studied. The work focuses on a theoretical model of one or two metastable states decaying into a continuum of states which is bounded from below. We examine the time evolution of such systems and how it is affected by the energy of the metastable state(s) and by the position of the poles of the scattering matrix in the complex plane. We also look closely at the spectral line shape. Numerical integration of a system of differential equations is used for solving the problem of the time evolution and spectral line shape while Freshbach-Fano projection operator formalism is used for finding the position of the poles. The results are compared with first order perturbation theory and with semi-analytical formula obtained from adiabatic elimination of the continuum. The last part of the thesis is dedicated to an application of the model on neon-helium-neon cluster. 1
3	Direct Top Quark Decay Width Measurement in the tt Lepton+Jets Channel at 8 TeV with the ATLAS Experiment Stolte-Cord to Krax, Philipp 24 October 2017 (has links) No description available. 530 Physik (PPN621336750) Particle Physics ATLAS Experiment Top Quark Physics Top Quark Decay Width
4	Measurement of B_s to D_s^()+D_s^()- and Determination of the B_s-B_sbar Width Difference DeltaGamma_s Using e+e- collisions Esen, Sevda 28 September 2012 (has links) No description available. Particle Physics mixing delta gamma Bs CP eigenstates Ds decay width difference
5	<em>η'</em> Decay to π<sup>+</sup>π<sup>-</sup>π<sup>+</sup>π<sup>−</sup> Jafari, Ehsan 01 January 2018 (has links) With the use of chiral theory of mesons [1], [2] we evaluate the decay rate of η′ → π+π−π+π−. Our theoretical study of this problem is different from the previous theo- retical study [3] and our predicted result is in a good agreement with the experiment. In this chiral theory we evaluate Feynman diagrams up to one loop and the decay rate is calculated with the use of triangle and box diagrams. The ρ0 meson includes in both type of diagrams as a resonance state. Divergent integrals in the loop calculations are regularized with the use of n-dimensional ’t Hooft-Veltman regularization technique. At the last step to obtain the decay rate, the phase space integral has been calculated. Chiral Theory of Mesons Anomaly Decay Width Triangle and Box Feynman Diagrams t'Hooft-Veltman Regularization
6	Measurement of the Partial Z Decay Width into b Quarks with the L3 Detector at LEP Kamrad, Dirk 18 May 1999 (has links) im PostScript-Format b Quark Z Boson Kopplungen Zerfallsbreite b Quark Z Boson Couplings Decay Width 530 Physik 29 Physik, Astronomie UO 5200 ddc:530
7	Lepton Flavor Violation In The Two Higgs Doublet Model Sundu, Hayriye 01 June 2007 (has links) (PDF) The lepton flavor violating interactions are interesting in the sense that they are sensitive the physics beyond the standard model and they ensure considerable information about the restrictions of the free parameters, with the help of the possible accurate measurements. In this work, we investigate the lepton flavor violating H+ ! W+l and the lepton flavor conserving H+ ! W+l decays in the general two Higgs doublet model and we estimate decay widths of these decays. After that, we analyze lepton flavor violating decay ! i in the same model and calculate its branching ratio. We observe that the experimental results of the processes under consideration can give comprehensive information about the physics beyond the standard model and the existing free parameters.

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