Loop Calculations With
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Initial studies of the effects of halogenated dispersions on the amount of NICS of rings for C8H12XNO2
In this research at the first complex and its halogenated derivatives were optimized. NBO calculations and NMR for the complexes were carried out at the B3LYP/6-31G*quantum chemistry level. In the 1- (4-fluorophenyl) -2, 3-dihydro-1 H-naphto- [1, 2-e] [1, 3] oxazine-3-n, there are 4 rings, respectively, rings from the side attached to the halogen They are named C, B, A, and D. Calculations and ...
متن کاملModern Techniques for One-Loop Calculations
We review the techniques used for one-loop calculations with emphasis on practical applications. QED is used as an example but the methods can be used in any theory. The aim is to teach how to use modern techniques, like the symbolic package FeynCalc for Mathematica and the numerical package LoopTools for Fortran or C++, in one-loop calculations.
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The method introduced in a previous paper to simplify the tensorial reduction in multi-leg loop calculations is extended to generic one-loop integrals, with arbitrary internal masses and external momenta. CERN-TH/97-372 December 1997
متن کاملAutomatic Loop Calculations with FeynArts, FormCalc, and LoopTools
This article describes three Mathematica packages for the automatic calculation of one-loop Feynman diagrams: the diagrams are generated with FeynArts, algebraically simplified with FormCalc, and finally evaluated numerically using the LoopTools package. The calculations are performed analytically as far as possible, with results given in a form well suited for numerical evaluation. The latter ...
متن کاملTwo–loop Calculations in the Mssm
Recent results on two–loop calculations in the MSSM are reviewed. The computation of the QCD corrections to ∆ρ, ∆r and to the mass of the lightest Higgs boson in the MSSM are presented. Talk given at the workshop “Quantum Effects in the MSSM”, Sept. 1997, Barcelona, Spain TWO–LOOP CALCULATIONS IN THE MSSM S. HEINEMEYER Institut für theoretische Physik, Universität Karlsruhe, 76128 Karlsruhe, Ge...
متن کاملStatus of Eikonal Two-Loop Calculations with Massive Quarks
The calculation of threshold corrections to hard scattering cross sections beyond leading logarithms requires the calculation of loop diagrams in the eikonal approximation [1]. One-loop calculations have been performed for all 2 → 2 partonic processes in heavy quark [2] and jet [3] production. The soft anomalous dimension matrix ΓS at one-loop allows the resummation of soft-gluon corrections at...
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تاریخ انتشار 2007