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Evaluating multi-loop Feynman diagrams with infrared and threshold singularities numerically
We present a method to evaluate numerically Feynman diagrams directly from their Feynman parameters representation. We first disentangle overlapping singularities using sector decomposition. Threshold singularities are treated with an appropriate contour deformation. We have validated our technique...
| Autores principales: | , , |
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| Lenguaje: | eng |
| Publicado: |
2007
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1088/1126-6708/2007/05/071 http://cds.cern.ch/record/1026199 |
| _version_ | 1780912213616230400 |
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| author | Anastasiou, Charalampos Beerli, Stefan Daleo, Alejandro |
| author_facet | Anastasiou, Charalampos Beerli, Stefan Daleo, Alejandro |
| author_sort | Anastasiou, Charalampos |
| collection | CERN |
| description | We present a method to evaluate numerically Feynman diagrams directly from their Feynman parameters representation. We first disentangle overlapping singularities using sector decomposition. Threshold singularities are treated with an appropriate contour deformation. We have validated our technique comparing with recent analytic results for the gg->h two-loop amplitudes with heavy quarks and scalar quarks. |
| id | cern-1026199 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2007 |
| record_format | invenio |
| spelling | cern-10261992023-10-04T08:58:17Zdoi:10.1088/1126-6708/2007/05/071http://cds.cern.ch/record/1026199engAnastasiou, CharalamposBeerli, StefanDaleo, AlejandroEvaluating multi-loop Feynman diagrams with infrared and threshold singularities numericallyParticle Physics - PhenomenologyWe present a method to evaluate numerically Feynman diagrams directly from their Feynman parameters representation. We first disentangle overlapping singularities using sector decomposition. Threshold singularities are treated with an appropriate contour deformation. We have validated our technique comparing with recent analytic results for the gg->h two-loop amplitudes with heavy quarks and scalar quarks.We present a method to evaluate numerically Feynman diagrams directly from their Feynman parameters representation. We first disentangle overlapping singularities using sector decomposition. Threshold singularities are treated with an appropriate contour deformation. We have validated our technique comparing with recent analytic results for the gg->h two-loop amplitudes with heavy quarks and scalar quarks.hep-ph/0703282CERN-PH-TH-2007-058CERN-PH-TH-2007-058oai:cds.cern.ch:10261992007-03-27 |
| spellingShingle | Particle Physics - Phenomenology Anastasiou, Charalampos Beerli, Stefan Daleo, Alejandro Evaluating multi-loop Feynman diagrams with infrared and threshold singularities numerically |
| title | Evaluating multi-loop Feynman diagrams with infrared and threshold singularities numerically |
| title_full | Evaluating multi-loop Feynman diagrams with infrared and threshold singularities numerically |
| title_fullStr | Evaluating multi-loop Feynman diagrams with infrared and threshold singularities numerically |
| title_full_unstemmed | Evaluating multi-loop Feynman diagrams with infrared and threshold singularities numerically |
| title_short | Evaluating multi-loop Feynman diagrams with infrared and threshold singularities numerically |
| title_sort | evaluating multi-loop feynman diagrams with infrared and threshold singularities numerically |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1088/1126-6708/2007/05/071 http://cds.cern.ch/record/1026199 |
| work_keys_str_mv | AT anastasioucharalampos evaluatingmultiloopfeynmandiagramswithinfraredandthresholdsingularitiesnumerically AT beerlistefan evaluatingmultiloopfeynmandiagramswithinfraredandthresholdsingularitiesnumerically AT daleoalejandro evaluatingmultiloopfeynmandiagramswithinfraredandthresholdsingularitiesnumerically |