Programs in Physics & Physical Chemistry
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Programs in Physics & Physical Chemistry |
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| Manuscript Title: Precise numerical evaluation of the two loop sunrise graph Master Integrals in the equal mass case | ||
| Authors: S. Pozzorini, E. Remiddi | ||
| Program title: sunem | ||
| Catalogue identifier: ADYC_v1_0 Distribution format: tar.gz | ||
| Journal reference: Comput. Phys. Commun. 175(2006)381 | ||
| Programming language: Fortran 77. | ||
| Computer: all. | ||
| Operating system: all. | ||
| RAM: 1532k | ||
| Word size: up to 32 | ||
| Keywords: multi-loop Feynman integrals, differential equations. | ||
| PACS: 02.30.Hq, 02.30.Mv, 02.60.-x, 12.15.Lk. | ||
| Classification: 4.4. | ||
Nature of problem: Numerical evaluation of the two Master Integrals of the equal mass two-loop sunrise Feynman graph for arbitrary momentum transfer in d = 2 and d = 4 dimensions. | ||
Solution method: Accelerated power series expansions obtained by solving the differential equations for the MIs at their singular points. With a maximum of 22 terms for the worse case expansion a relative precision of better than a part in 1015 is achieved for arbitrary real values of the momentum transfer. | ||
Restrictions: Limited to real momentum transfer and equal internal masses. | ||
Running time: Approximately 1 μs to evaluate the four Master integrals for a fixed momentum transfer value on a Pentium IV/3 GHz Linux PC. |
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