Charming Worms: Crawling Between Natures

Penguin Amplitudes: Charming Contributions *

We briefly introduce the Wick-contraction parametrization of hadronic matrix elements and discuss some applications to B and K physics. In spite of the progresses in non-perturbative techniques, the computation of hadronic matrix elements is still an open problem, particularly when the final state contains more than one meson. In this case, methods based on Euclidean field theory, such as QCD s...

The Natures of Nonconfigurationality

Population, development, and human natures

At the dawn of this new millennium, the human enterprise is quickly becoming a globally unified one. Yet numerous obstacles and pitfalls remain in the path of a full and fair unification. A substantial fraction of the world’s population is well-off and increasingly connected through trade and communications systems. But an even larger fraction is struggling to make ends meet and is only sketchi...

Charming Penguins in B Decays

Full expressions of the B0 d → π+π− and B0 d → π0π0 amplitudes, given in terms of matrix elements of operators of the effective weak Hamiltonian, are used to study the dependence of the relevant branching ratios on the different contributions. The uncertainty in the extraction of the weak phase α from the measurement of the timedependent asymmetry in B0 d → π+π− decays is also analyzed. We find...

Natures and Perspectives

“Nature” and “Perspective” have similar meaning for Eclipse developers and for personnel in a software product line organization. The nature of product line work differs from one part of the organization to another. A developer using Eclipse switches among perspectives to have ready access to the specific tools needed for the nature of the current work such as testing, modeling, or plug-in deve...