The Adler DD-function for N=1{\cal N}=1 SQCD regularized by higher covariant derivatives in the three-loop approximation

We calculate the Adler $D$-function for ${\cal N}=1$ SQCD in the three-loop approximation using the higher covariant derivative regularization and the NSVZ-like subtraction scheme. The recently formulated all-order relation between the Adler function and the anomalous dimension of the matter superfields defined in terms of the bare coupling constant is first considered and generalized to the case of an arbitrary representation for the chiral matter superfields. The correctness of this all-order relation is explicitly verified at the three-loop level. The special renormalization scheme in which this all-order relation remains valid for the $D$-function and the anomalous dimension defined in terms of the renormalized coupling constant is constructed in the case of using the higher derivative regularization. The analytic expression for the Adler function for ${\cal N}=1$ SQCD is found in this scheme to the order $O(\alpha_s^2)$. The problem of scheme-dependence of the $D$-function and the NSVZ-like equation is briefly discussed.Comment: 25 pages, 2 figures; the version accepted for publication in Nuclear Physics

OBLITERATING ATHEROSCLEROSIS OF THE LOWER EXTREMITIES: COURSE PROGNOSIS AND TREATMENT

Objectives - to develop a course prognosis method for obliterating atherosclerosis of femoropopliteal and tibial localization. Material and methods. We studied a group of patients with obliterating atherosclerosis of femoropopliteal and tibial localization. The subjects for analysis were significant prognostic clinical, hemodynamic, hemostasiological, immunological characteristics, markers of endothelial dysfunction, changes in lipid profile. Results. As a result of multivariate analysis the pathogenetically substantiated prediction system with the disease index calculation was developed. The obliterative atherosclerosis course with index less than 13 points is assessed as non progressive, with index 13 points and more - as progressive

Diffraction radiation from a screen of finite conductivity

An exact solution has been found for the problem of diffraction radiation appearing when a charged particle moves perpendicularly to a thin finite screen having arbitrary conductivity and frequency dispersion. Expressions describing the Diffraction and Cherenkov emission mechanisms have been obtained for the spectral-angular forward and backward radiation densities.Comment: 6 pages, 4 figure