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Two-loop Radiative Corrections to B→Xsγ from the Higgs in the Standard Model

Author: LinLin
Tutor: FengTaiFu
School: Dalian University of Technology
Course: Theoretical Physics
Keywords: Standard Model Higgs mechanism Rare Decay B Physics Two-Loop Electroweak Correction
CLC: O572.2
Type: Master's thesis
Year: 2009
Downloads: 22
Quote: 0
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Abstract


The standard model of the particle physics is the theory that describes the strong force, weak force and electromagnetic force.These basic forces and the basic particles compose of all of the matters.It subjects to the category of fields and particles and compatibles with the quantum mechanics and special theory of relativity.As the key particle in the electroweak symmetry breaking mechanism,Higgs bosons is not discovered in the experiment.In the chaperⅠ,it reviews the correlative knowledge of SM,and discusses the success of the standard model and its limitation.In chaperⅡ,it presents the rare decay of B-meson,In the process of modern physics development,B physics has developed the most important subject in the particle physics.In the following,chaperⅢ,we analyze the corrections to the branch ratio of decay b→sy from the Higgs sector in the standard model using the effective lagrangian method.Through the expanding the self-energy diagrams and the renormalization calculation,we get the Wilson coefficients and the branch ratio of B→X_sγ.The numerical result indicates that corrections from this sector to b→sγis about -2%as m_h~0.5TeV.

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CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > High-energy physics > Particle physics
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