منابع مشابه
Calculations of penguin diagrams in B decays
We analyze the effects of the space-like penguin diagrams in two body B decays B → KK̄ and B → πK̄. Special attention is paid to the operator Q6, whose contribution is large in the BSW model, but vanishes in the PQCD method in the approximation of neglecting the masses in the final states. Suppressions of the space-like penguin diagrams are found in the PQCD method, which implies that the contrib...
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The computation of higher order processes very often involves a large number of diagrams. In addition, it is in general not possible to solve the occurring integrals explicitly and expansions in small quantities have to be performed. This makes it necessary to automate the calculations as much as possible. A program package will be described which generates automatically the Feynman diagrams, m...
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In theories like SM or MSSM with a complex gauge group structure the complete set of Feynman diagrams contributed to a particular physics process can be splited to exact gauge invariant subsets. Arguments and examples given in the review demonstrate that in many cases computations and analysis of the gauge invariant subsets are important. The increase of collider energies requires computations ...
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In this study, two CCCT diagrams are drawn to be compared with a CCT diagram. The CCCT diagrams represent continuous cooling transformations in stress assisted state. The increased Md and Bd temperatures of CCCT diagrams were also compared with those of the CCT diagrams and the cause was investigated from both thermodynamic and metallurgical viewpoints. Thermodynamic examinations revealed that ...
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ژورنال
عنوان ژورنال: Zpravodaj Československého sdružení uživatelů TeXu
سال: 2004
ISSN: 1211-6661,1213-8185
DOI: 10.5300/2004-2/54