منابع مشابه
Rare Kaon
Recent experiments on rare kaon decays are described, with emphasis on the program at the Brookhaven National Laboratory Alternating Gradient Synchrotron. New limits on the modes KL + pe and Kr, -v ee and a preliminary new measurement of the Kr. + pp branching ratio are presented from AGS Experiment 791. Other modes, including K+ + x+p’+e-, K+ + r+ + nothing, and KL -+ r’e+e-, which have been t...
متن کاملTranscription factories
There is considerable evidence that transcription does not occur homogeneously or diffusely throughout the nucleus, but rather at a number of specialized, discrete sites termed transcription factories. The factories are composed of ~4-30 RNA polymerase molecules, and are associated with many other molecules involved in transcriptional activation and mRNA processing. Some data suggest that the p...
متن کاملB - Factories
The evolution of B-Factories is discussed, and comments are made about the common features of present-day asymmetric storage ring collider designs. * Work supported by Department of Energy contract DE-AC03-76SF00515. Presented at the 4th International Symposium on Heavy E’lavour Physics, Orsay, France, June 25-29, 1991 There was a symposium Progress on B-Factories the day before the Heavy Flavo...
متن کاملTranscription factories.
There is increasing evidence that different transcription units are transcribed together in discrete nuclear structures known as transcription factories. Various new techniques enable us to detect and characterize these structures. We review the latest findings and discuss how they support a model for transcription and chromosome organization.
متن کاملKaon Physics
The most recent progress and future prospects in kaon physics are reviewed. Main results are the first observation of the rare decays KS → π ee and KS → π μμ by NA48, newK → πνν event observed by E949 and new precision measurements of KS,L → πeν decays by KTeV, KLOE and NA48 made in an effort to resolve the slight deviation from the unitarity in the CKM matrix, involving the |Vus| coupling.
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ژورنال
عنوان ژورنال: Europhysics News
سال: 1992
ISSN: 0531-7479,1432-1092
DOI: 10.1051/epn/19922301007