2,747 research outputs found
Contribution of matter fields to the Gell-Mann-Low function for N=1 supersymmetric Yang-Mills theory, regularized by higher covariant derivatives
Contribution of matter fields to the Gell-Mann-Low function for N=1
supersymmetric Yang-Mills theory, regularized by higher covariant derivatives,
is obtained using Schwinger-Dyson equations and Slavnov-Tailor identities. A
possible deviation of the result from the corresponding contribution in the
exact Novikov, Shifman, Vainshtein and Zakharov -function is discussed.Comment: 20 pages, 4 figure
Summation of diagrams in N=1 supersymmetric electrodynamics, regularized by higher derivatives
For the massless N=1supersymmetric electrodynamics, regularized by higher
derivatives, the Feynman diagrams, which define the divergent part of the
two-point Green function and can not be found from Schwinger-Dyson equations
and Ward identities, are partially summed. The result can be written as a
special identity for Green functions.Comment: 16 pages, 10 figure
Four-loop verification of algorithm for Feynman diagrams summation in N=1 supersymmetric electrodynamics
A method of Feynman diagrams summation, based on using Schwinger-Dyson
equations and Ward identities, is verified by calculating some four-loop
diagrams in N=1 supersymmetric electrodynamics, regularized by higher
derivatives. In particular, for the considered diagrams correctness of an
additional identity for Green functions, which is not reduced to the gauge Ward
identity, is proved.Comment: 14 pages, 9 figure
Two-loop Gell-Mann-Low function of N=1 supersymmetric Yang-Mills theory, regularized by higher covariant derivatives
Two-loop Gell-Mann-Low function is calculated for N=1 supersymmetric
Yang-Mills theory, regularized by higher covariant derivatives. The integrals,
which define it, are shown to be reduced to total derivatives and can be easily
calculated analytically.Comment: 17 pages, 3 eps figure
Diagnostics and Treatment of Acute Biliary Pancreatitis
The authors have suggested a new diagnostic algorithm to be applied in case of impacted bile duct stone of major duodenal papilla, based on prognosis of acute pancreatitis according to results of analysis of biochemical bile marker
Endoscopic biliary stenting for post-cholecystectomy bile leaks
This paper deals analyzes the treatment experience of 15 patients with bile leakage after laparoscopic cholecystectomy. All patients have undergone endoscopic transpapillary interventions in the bile ducts, including a retrograde cholangiography, papillotomy, biliary stenting, either individually or in combination with traditional surger
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