منابع مشابه
VC Dimension, ε-nets and ε-approximation
“I’ve never touched the hard stuff, only smoked grass a few times with the boys to be polite, and that’s all, though ten is the age when the big guys come around teaching you all sorts to things. But happiness doesn’t mean much to me, I still think life is better. Happiness is a mean son of a bitch and needs to be put in his place. Him and me aren’t on the same team, and I’m cutting him dead. I...
متن کاملLattice matrix elements confronting the experimental value of ε′/ε
A new lattice estimate of K → 2π transitions claims, contrary to all other computations, that the hadronic matrix element for the gluon penguin operator Q6 has opposite sign and, in addition, is much larger than the vacuum saturation approximation. We comment under what conditions (if any) it is possible to reconcile this lattice result with the experimental value of ε/ε . The dramatic impact o...
متن کاملTheory of Ε ′ /ε
I shortly review the present status of the theoretical estimates of ε/ε . I consider a few aspects of the theoretical calculations which may be relevant in understanding the present experimental results. I discuss the role of higher order chiral corrections and in general of non-factorizable contributions for the explanation of the ∆I = 1/2 selection rule in kaon decays and ε/ε . Lacking reliab...
متن کاملTheoretical status of ε ′ / ε
The present theoretical status of the parameter for direct CP violation ε/ε in the Standard Model is reviewed and compared with most recent experimental measurements of the same quantity. After collecting the basic expressions for ε/ε, the situation of hadronic matrix element calculations is summarised. The matrix elements constitute the dominant source of uncertainty for theoretical determinat...
متن کاملTheory Status of Ε ′ /ε
I shortly review the present status of the theoretical calculations of ε/ε and the comparison with the present experimental results. I discuss the role of higher order chiral corrections and in general of non-factorizable contributions for the explanation of the ∆I = 1/2 selection rule and direct CP violation in kaon decays. Still lacking satisfactory lattice calculations, analytic methods and ...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1903
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19031621903