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AbstractAbstract
[en] In this thesis the two rare decays B _s→μ"+μ"- and anti B→X_sγ are studied. First the decay B _s→μ"+μ"- is studied within the Standard Model. The three-loop corrections in quantum chromodynamics (QCD) are discussed, and precise Standard-Model predictions for the branching ratio are presented. Then the decay B_s→μ"+μ"- is considered in the type-II 2-Higgs-doublet model, whereby also here the determination of the three-loop correction in QCD is discussed. Thereafter the calculation of the Wilson coefficients for anti B→X_sγ within the Standard Model in three-loop order is discussed. Then the same Wilson coefficients are calculated in 2-Higgs-doublet models in three-loop order. From the predicted decay width by comparison with the experimental data a lower limit for the mass of the charged Higgs boson is derived.
Original Title
Seltene B-Meson-Zerfaelle innerhalb und jenseits des Standardmodells
Primary Subject
Source
9 May 2014; 145 p; Available from: https://publikationen.bibliothek.kit.edu/1000041138/3090373; Diss. (Dr.rer.nat.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation; Numerical Data
Country of publication
ANTIMATTER, ANTIMESONS, ANTIPARTICLES, BASIC INTERACTIONS, BEAUTY MESONS, BEAUTY PARTICLES, BOSONS, COMPOSITE MODELS, DATA, DECAY, DIAGRAMS, DIMENSIONLESS NUMBERS, ELEMENTARY PARTICLES, FIELD THEORIES, GRAND UNIFIED THEORY, HADRONS, INFORMATION, INTERACTIONS, MASS, MATHEMATICAL MODELS, MATTER, MESONS, NUMERICAL DATA, PARTICLE DECAY, PARTICLE MODELS, PARTICLE PROPERTIES, PSEUDOSCALAR MESONS, QUANTUM FIELD THEORY, QUARK MODEL, STRANGE MESONS, STRANGE PARTICLES, UNIFIED GAUGE MODELS, WEAK INTERACTIONS, WEAK PARTICLE DECAY
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