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ACAT 2008

3–7 Nov 2008
Ettore Majorana Foundation and Centre for Scientific Culture
Europe/Zurich timezone

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Session

Methodology of Computations in Theoretical Physics - Session 1

5 Nov 2008, 14:00
Ettore Majorana Foundation and Centre for Scientific Culture

Ettore Majorana Foundation and Centre for Scientific Culture

Via Guarnotta, 26 - 91016 ERICE (Sicily) - Italy Tel: +39-0923-869133 Fax: +39-0923-869226 E-mail: hq@ccsem.infn.it

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  1. 39. Current status of FORM parallelization
    Mikhail Tentyukov (Karlsruhe University)
    05/11/2008, 14:00
    3. Computation in Theoretical Physics
    Parallel Talk
    We report on the status of the current development in parallelization of the symbolic manipulation system FORM. Most existing FORM programs will be able to take advantage of the parallel execution, without the need for modifications.
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  2. 196. New implementation of the sector decomposition on FORM
    Dr Takahiro Ueda (KEK)
    05/11/2008, 14:25
    3. Computation in Theoretical Physics
    Parallel Talk
    Nowadays the sector decomposition technique, which can isolate divergences from parametric representations of integrals, becomes quite useful tool for numerical evaluations of the Feynman loop integrals. It is used to verify the analytical results of multi-loop integrals in the Euclidean region, or in some cases practically used in the physical region by combining with other methods handling...
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  3. 216. FormCalc 6
    Thomas Hahn (MPI Munich)
    05/11/2008, 14:50
    3. Computation in Theoretical Physics
    Parallel Talk
    The talk will cover the latest version of the Feynman-diagram calculator FormCalc. The most significant improvement is the communication of intermediate expressions from FORM to Mathematica and back, for the primary purpose of introducing abbreviations at an early stage. Thus, longer expressions can be treated and a severe bottleneck in particular for processes with high multiplicities removed.
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  4. 194. Numerical Evaluation of Feynman Integrals by a Direct Computation Method
    Dr Fukuko YUASA (KEK)
    05/11/2008, 15:15
    3. Computation in Theoretical Physics
    Parallel Talk
    We apply a 'Direct Computation Method', which is purely numerical, to evaluate Feynman integrals. This method is based on the combination of an efficient numerical integration and an efficient extrapolation strategy. In addition, high-precision arithmetic and parallelization techniques can be used if required. We present our recent progress in the development of this method and show...
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