منابع مشابه
Flavor Dependence of Sea Quark Structure Functions
Quark masses are shown to play an important role in the nucleon sea. Our analysis using massive QCD splitting functions demonstrates the existence of two Feynman-x sea regimes. For small x the strange sea is larger while at large x the non-strange light sea is dominant. This crossover effect has been observed in a phenomenological analysis by the CTEQ Collaboration. We also investigate the char...
متن کاملProduction process dependence of neutrino flavor conversion
We perform a covariant wave-packet analysis of neutrino oscillations taking into account the lifetime of the neutrino production process . We find that flavor oscillations in space are washed out when the neutrinos are produced from long lived resonances and what may be observed in appearance/disappearance experiments is a uniform conversion probability independent of distance. The lifetime of ...
متن کاملFlavor dependence of QCD vacuum properties
The values for quark condensate and tensor susceptibility of QCD vacuum are given for different number of flavors. It is shown that, the nonperturbative aspects of QCD vacuum are strongly dependent on the number of flavors. PACS : 11.15.Tk; 11.30.Fs; 12.38.Aw; 12.38.Lg
متن کاملQuark mass dependence of two-flavor QCD
I explore the rich phase diagram of two-flavor QCD as a function of the quark masses. The theory involves three parameters, including one that is CP violating. As the masses vary, regions of both firstand second-order transitions are expected. For nondegenerate quarks, nonperturbative effects cease to be universal, leaving individual quark mass ratios with a renormalization scheme dependence. T...
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there has been a gradual shift of focus from the study of rule systems, which have increasingly been regarded as impoverished, … to the study of systems of principles, which appear to occupy a much more central position in determining the character and variety of possible human languages. there is a set of absolute universals, notions and principles existing in ug which do not vary from one ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2011
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2011.05.008