950 resultados para IND-CCA


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We use the QCD sum rules to study the recently observed charmonium-like structure Z+ c (3900) as a tetraquark state. We evaluate the three-point function and extract the coupling constants of the Z+ c J/ψ π+, Z+ c ηc ρ+ and Z+ c D+ ¯D∗0 vertices and the corresponding decay widths in these channels. The results obtained are in good agreement with the experimental data and supports to the tetraquark picture of this state.

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Questo studio mira ad affinare modelli numerici a fibre che siano in grado di valutare il comportamento differito viscoso fessurato di elementi in conglomerato cementizio armato. Il modello numerico iterativo a fibre è stato calibrato e raffrontato con due campagne sperimentali che hanno studiato il fenomeno del creep in due travi in ca gettate in due fasi. E' in grado di valutare le deformzioni differite di sezioni e travi gettate e caricate in più fasi.

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Chronic hepatitis C infection is a major cause of end-stage liver disease. Therapy outcome is influenced by 25-OH vitamin D deficiency. To further address this observation, our study investigates the impact of the vitamin D receptor (NR1I1) haplotype and combined effects of plasma vitamin D levels in a well-described cohort of hepatitis C patients.

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