نتایج جستجو برای: fragmentation measurement
تعداد نتایج: 474775 فیلتر نتایج به سال:
We have developed a new technique for inclusive reconstruction of the energy of B hadrons. The excellent efficiency and resolution of this technique allow us to make the most precise determination of the b-quark fragmentation function, using e(+)e(-)-->Z0 decays recorded in the SLAC Large Detector experiment. We compared our measurement with the predictions of a number of fragmentation models. ...
We present the first measurement of the cross section and the double longitudinal spin asymmetry of inclusive π0 production in polarized p+p collisions at √ s = 200 GeV at mid-rapidity with the STAR detector, using the barrel electromagnetic calorimeter. The measured cross section is compared to NLO pQCD calculations and can provide constraints on the pion fragmentation functions. Fragmentation...
Land fragmentation, which implies a defective land tenure structure, is a major problem at various spatial scales, and may hinder effective agricultural production and sustainable rural development. Policy decisions to reduce land fragmentation require reliable measurement indices. However, current indices present significant weaknesses since they do not take all of the relevant factors into ac...
We consider the growth-fragmentation equation and we address the problem of finding the division rate from the stable size distribution of the population, which is easily measured, but non-smooth. We propose a method based on the Mellin transform for growth-fragmentation equations with self-similar kernels. We build a sequence of functions which converges to the density of the population in div...
Image segmentations have been performed to identify the surface fragmentation of rock piles using 3D surface data, and quantified. The advantages for fragmentation measurement using image analysis are significant and include: quantifying image segmentation performance in isolation of the downstream processes of fragment classification and size distribution calculation, utilisation of 3D data to...
Gluon fragmentation to χcJ(1P ) followed by single photon emission represents the dominant source of prompt J/Ψ’s at the Tevatron for p⊥>∼6 GeV. Since fragmenting gluons are approximately transverse, their products are significantly polarized. We find that gluon fragmentation populates the helicity levels of χc1, χc2 and J/Ψ according to D χ (h=0) c1 : D χ (|h|=1) c1 ≃ 1 : 1, D χ (h=0) c2 : D χ...
This paper analyses the case of the Theme Teams, i.e. one of the instruments used within the STELLAR Network of Excellence to develop human capital and support research capacity in the Technology Enhanced Learning (TEL) field. Qualitative and quantitative data about how this instrument worked are presented in the paper, with the aim to demonstrate its ability to promote integration of researche...
The pathogenesis of equine grass sickness (EGS) has not fully understood. A better understanding of the exact pathogenesis of diseases can help to make an accurate diagnosis. Previous studies reported some pathological damage of neuronal cells in EGS patients. In this study, primarily cytotoxicity of serum from three clinically EGS-diagnosed horses on PC12 Tet-off (PTO) cells was assessed. Subs...
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