Multijet merging in a variable flavor number scheme

A Variable - Flavour Number Scheme for NNLO

At NNLO it is particularly important to have a Variable-Flavour Number Scheme (VFNS) to deal with heavy quarks because there are major problems with both the zero mass variable-flavour number scheme and the fixed-flavour number scheme. I illustrate these problems and present a general formulation of a Variable-Flavour Number Scheme (VFNS) for heavy quarks that is explicitly implemented up to NN...

Inclusive photoproduction of D mesons at next-to-leading order in the General-Mass Variable-Flavor-Number Scheme

We discuss the inclusive production of D mesons in γp collisions at DESY HERA, based on a calculation at next-to-leading order in the general-mass variable-flavornumber scheme. In this approach, MS subtraction is applied in such a way that large logarithmic corrections are resummed in universal parton distribution and fragmentation functions and finite mass terms are taken into account. We pres...

The massive 3 - loop operator matrix elements with two masses and the generalized variable flavor number scheme ∗

Charged-Current Leptoproduction of D-Mesons in the Variable Flavor Scheme

We present formulae for the momentum (z) distributions of D-mesons produced in neutrino deep-inelastic scattering off strange partons. The expressions are derived within the variable flavor scheme of Aivazis et al. (ACOT-scheme), which is extended from its fully inclusive formulation to one-hadron inclusive leptoproduction. The dependence of the results on the assumed strange quark mass ms is i...

medical x-ray image hierarchical classification using a merging and splitting scheme in feature space

abstract— due to the daily mass production and the widespread variation of medical x-ray images, it is necessary to classify these for searching and retrieving proposes, especially for content-based medical image retrieval systems. in this paper, a medical x-ray image hierarchical classification structure based on a novel merging and splitting scheme and using shape and texture features is prop...