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Kabuswa Davy, M.
- D Meson Decays and New Physics
Abstract Views :289 |
PDF Views:6
Authors
Affiliations
1 Institute of Particle Physics, Central China Normal University, CN
1 Institute of Particle Physics, Central China Normal University, CN
Source
Journal of Physics & Astronomy, Vol 5, No 1 (2017), Pagination: 1-20Abstract
On one hand, we investigated the decay rates of meson decays from the basic computations of the Feynman diagrams. Under this approach, we derived analytically expressions for the square amplitudes of leptonic and semileptonic decays and finally used them to determine the analytical and numerical results for the decay rates. With decay rates results at our disposal, we determined the branching ratios of leptonic and semileptonic decays separately within the standard model (SM) compared our results to the latest theoretical and experimental results.
On the other hand, we focused on the effective Lagrangian (EL) under weak interaction from a general approach and used it in our calculation of differential decay rates of mesons. Thereafter, we calculated the total decay rates via integration with respect to. In addition, using the total decay rates results, the branching ratios and the contributions from the new physics (NP) operators were investigated resulting in some phenomenologies of physics beyond the SM.
Keywords
D Meson, Leptonic Decay, Semileptonic Decay, New Physics.Full Text
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- The Future of Theoreticle Particle Physics:A Summary
Abstract Views :180 |
PDF Views:19
Authors
Affiliations
1 Institute of Particle Physics, Central China Normal University, CN
1 Institute of Particle Physics, Central China Normal University, CN
Source
Journal of Physics & Astronomy, Vol 5, No 1 (2017), Pagination: 1-12Abstract
From history, it can be traced that fundamental physics began the twentieth century with the revolution of two great important theories in physics namely: relativity and quantum mechanics. On one hand, a good number of years of the second half of the century was devoted to the construction of a theoretical structure with a view of unifying these radical ideas. On the other hand, this foundation has also led us to a number of paradoxes in our understanding of nature. Many attempts to make sense of quantum mechanics and gravity at the smallest distance scales lead inexorably to the conclusion that space-time is an approximate notion that must emerge from more primitive building blocks. Furthermore, violent short-distance quantum fluctuations in the vacuum seem to make the existence of a macroscopic world wildly implausible, and yet we live comfortably in a huge universe. Now, what, if anything, tames these fluctuations? Why is there a macroscopic universe? These are two of the central theoretical challenges of fundamental physics in the twenty-first century. In this summary, we describe the circle of ideas surrounding these questions, as well as some of the theoretical and experimental fronts on which they are being attacked and predict what the future holds for theoretical particle physics.Keywords
Relativity, Quantum Mechanics, Standard Model.Full Text
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