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Author | : |
Publisher | : |
Total Pages | : 217 |
Release | : 2010 |
Genre | : |
ISBN | : |
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The standard model has been highly successful at describing current experimental data. However, extensions of the standard model predict particles that have masses at energy scales that are above the electroweak scale. The flavor-changing neutral current processes of the B meson are sensitive to the influences of these new physics contributions. These processes proceed through loop diagrams, thus allowing new physics to enter at the same order as the standard model. New physics may contribute to the enhancement or suppression of rate asymmetries or the decay rates of these processes. The transition B → V[gamma] (V = K*(892), [rho](770), [omega](782), [phi](1020)) represents radiative decays of the B meson that proceed through penguin processes. Hadronic uncertainties limit the theoretical accuracy of the prediction of the branching fractions. However, uncertainties, both theoretical and experimental, are much reduced when considering quantities involving ratios of branching fractions, such as CP or isospin asymmetries. The most dominant exclusive radiative b → s transition is B → K*[gamma]. We present the best measurements of the branching fractions, direct CP, and isospin asymmetries of B → K*[gamma]. The analogous b → d transitions are B → [rho][gamma] and B → [omega][gamma], which are suppressed by a factor of.
Author | : Aaron Kevin Yarritu |
Publisher | : |
Total Pages | : |
Release | : 2010 |
Genre | : |
ISBN | : |
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Observational evidence and theoretical motivation have led us to the conclusion that our current understanding of the universe is incomplete. While new physics is expected to exist above the electroweak scale, its influence can be detected by experiments that operate below this scale. The Babar experiment has recorded approximately 432 fb-1 of data at the center of mass energy of 10.58 GeV, which corresponds to the Y(4S) mass. One of the physics programs is studying radiative decays of the B meson. These decays primarily proceed through loop diagrams, and thus influences of new particles may be detectable. In this thesis, I present results of the measurements of the branching fractions, CP asymmetry, and isospin asymmetry of B -> K* gamma. Results are also presented for the measurements of the branching fractions of B -> rho(omega) gamma. Finally, a search for the decay of B -> phi gamma is given.
Author | : Doug Reilly |
Publisher | : |
Total Pages | : 700 |
Release | : 1991 |
Genre | : Non-destructive testing |
ISBN | : 9780160327247 |
Download Passive Nondestructive Assay of Nuclear Materials Book in PDF, ePub and Kindle
Author | : Symposium on Standardization of Radionuclides (1966, Wien) |
Publisher | : |
Total Pages | : 744 |
Release | : 1967 |
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Total Pages | : 612 |
Release | : 1976 |
Genre | : Nuclear energy |
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Total Pages | : 484 |
Release | : 1994-02 |
Genre | : Power resources |
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Author | : United States. Energy Research and Development Administration |
Publisher | : |
Total Pages | : 600 |
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Genre | : Medicine |
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Release | : 1992-06 |
Genre | : Aeronautics |
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Author | : Ron Jenkins |
Publisher | : CRC Press |
Total Pages | : 512 |
Release | : 1995-04-26 |
Genre | : Science |
ISBN | : 9780824795542 |
Download Quantitative X-Ray Spectrometry, Second Edition, Book in PDF, ePub and Kindle
This work covers important aspects of X-ray spectrometry, from basic principles to the selection of instrument parameters and sample preparation. This edition explicates the use of combined X-ray fluorescence and X-ray diffraction data, and features new applications in environmental studies, forensic science, archeometry and the analysis of metals and alloys, minerals and ore, ceramic materials, catalysts and trace metals.;This work is intended for spectroscopists, analytical chemists, materials scientists, experimental physicists, mineralogists, biologists, geologists and graduate-level students in these disciplines.
Author | : World Health Organization |
Publisher | : World Health Organization |
Total Pages | : 111 |
Release | : 2009 |
Genre | : Medical |
ISBN | : 9241547677 |
Download WHO Handbook on Indoor Radon Book in PDF, ePub and Kindle
This handbook focuses on residential radon exposure from a public health point of view and provides detailed recommendations on reducing health risks from radon and sound policy options for preventing and mitigating radon exposure. The material in the handbook reflects the epidemiological evidence that indoor radon exposure is responsible for a substantial number of lung cancers in the general population. Information is provided on the selection of devices to measure radon levels and on procedures for the reliable measurement of these levels. Discussed also are control options for radon in new dwellings, radon reduction in existing dwellings as well as assessment of the costs and benefits of different radon prevention and remedial actions. Also covered are radon risk communication strategies and organization of national radon programs.--Publisher's description.