111,459 research outputs found
A Mathematica Interface for FormCalc-generated Code
This note describes a Mathematica interface for Fortran code generated by
FormCalc. The interfacing code is set up automatically so that only minuscule
changes in the driver files are required. The interface makes a function to
compute the cross-section or decay rate available in Mathematica. This function
depends on the model parameters chosen for interfacing in the Fortran code.Comment: 6 page
New Features in FormCalc 4
FormCalc is a Mathematica package for the automatic computation of tree-level
and one-loop Feynman amplitudes. It accepts diagrams generated by FeynArts,
simplifies them, and generates a complete Fortran code for their numerical
evaluation. Version 4 includes new features which enhance performance,
convenience of use, and modularity/code reusability.Comment: 5 pages, Talk given at the 7th DESY Workshop On Elementary Particle
Theory: Loops And Legs In Quantum Field Theory, Zinnowitz, Germany, 25-30 Apr
200
Excursions into FeynArts and FormCalc
Programming techniques which extend the capabilities of FeynArts and FormCalc
are introduced and explained using examples from real applications.Comment: 5 pages, proceedings contribution to Loops and Legs 2006, Eisenach,
German
News from FormCalc and LoopTools
The FormCalc package automates the computation of FeynArts amplitudes up to
one loop including the generation of a Fortran code for the numerical
evaluation of the squared matrix element. Major new or enhanced features in
Version 5 are: iterative build-up of essentially arbitrary phase-spaces
including cuts, convolution with density functions, and uniform treatment of
kinematical variables. The LoopTools library supplies the one-loop integrals
necessary for evaluating the squared matrix element. Its most significant
extensions in Version 2.2 are the five-point family of integrals, and complex
and alternate versions.Comment: 5 pages, to appear in the proceedings of the 7th International
Symposium on Radiative Corrections (RADCOR05), Shonan Village, Japan, 200
Genetic diversity and pathogenicity of the grey mould fungus Botrytis
Genetic diversity and pathogenicity of the grey mould fungus Botrytis
Botrytis spp., causes pre- and postharvest decay on strawberry crops. Botrytis spp. isolates from several German strawberry-growing fields, which received several fungicide treatments against Botrytis per season, were analyzed to determine their sensitivity against botryticides.Universidad de Malaga. Campus de Excelencia Internacional Andalucia Tec
Core inflation in the Euro area: an application of the generalized dynamic factor model
Since the second half of the nineties the euro area has been subject to a considerable accumulation of temporary and idiosyncratic price shocks. Core inflation indicators for the euro area are thus of utmost interest. Based on euro area-wide data core inflation in this paper is analyzed by means of an indicator derived from the generalized dynamic factor model. This indicator reveals that HICP inflation strongly exaggerated both the decline as well as the increase in the price trend in 1999 and 2000/2001. Our results reinforce those achieved by Cristadoro, Forni, Reichlin and Versonese (2001) based on euro area country data which indicates the robustness of the indicator. Klassifikation: C33, E3
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