Pick out a penguin
نویسندگان
چکیده
منابع مشابه
بررسی یک مورد بیماری Niemann Pick تیپ A
Niemann Pick type A is a very rare hereditary disease with an incidence 1 in 20000-40000 live birth, which is calassified as a shingolipidoses. The disease is marked by the abnormal accumulation of sphingomyelin in most tissues, secondary to sphingomylinase deficiency. The most clinical manifestations are: Splenohepatomegaly–cherry red maculae-neuropathologic findings . This is a ...
متن کاملPenguin Mediated
We report on preliminary results of searches for penguin mediated B decays based on 20.7 fb −1 of data collected at the Υ (4S) peak with the BABAR detector at PEP-II. The following branching fractions have been measured: B(B + → φK +) = (7.7 −5.6 ± 1.7) × 10 −6 , where the first error is statistical and the second systematic. For several other modes we report upper limits on their branching fra...
متن کاملPenguin 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...
متن کاملGeometry for a penguin-albatross rookery.
We introduce a simple ecological model describing the spatial organization of two interacting populations whose individuals are indifferent to conspecifics and avoid the proximity to heterospecifics. At small population densities Φ a nontrivial structure is observed where clusters of individuals arrange into a rhomboidal bipartite network with an average degree of 4. For Φ → 0 the length scale,...
متن کاملTaking the Pick out of the Bunch - Type-Safe Shrinking of Metamodels
To focus only on those parts of a metamodel that are of interest for a specific task requires techniques to generate metamodel snippets. Current techniques generate strictly structure-preserving snippets, only, although restructuring would facilitate to generate less complex snippets. Therefore, we propose metamodel shrinking to enable type-safe restructuring of snippets that are generated from...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1998
ISSN: 0028-0836,1476-4687
DOI: 10.1038/27075