The integrand form of infrared singularities of two-loop QCD scattering amplitudes
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866908716151865344 |
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| author | Bargiela, Piotr |
| author_facet | Bargiela, Piotr |
| contents | In this work, we express the singular part of a scattering amplitude in terms of Feynman integrals compatible with topologies appearing in the bare amplitude, and we choose a basis of locally finite Master Integrals. In two-loop massless QCD, we find such a representation of the amplitude singularities using a systematic ansatz reconstruction of the integrand from a predicted integrated form. As an example application, we write the finite part of an amplitude for the digluon production in quark annihilation for some helicity configurations as manifestly locally finite. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_03684 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The integrand form of infrared singularities of two-loop QCD scattering amplitudes Bargiela, Piotr High Energy Physics - Phenomenology High Energy Physics - Theory In this work, we express the singular part of a scattering amplitude in terms of Feynman integrals compatible with topologies appearing in the bare amplitude, and we choose a basis of locally finite Master Integrals. In two-loop massless QCD, we find such a representation of the amplitude singularities using a systematic ansatz reconstruction of the integrand from a predicted integrated form. As an example application, we write the finite part of an amplitude for the digluon production in quark annihilation for some helicity configurations as manifestly locally finite. |
| title | The integrand form of infrared singularities of two-loop QCD scattering amplitudes |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2505.03684 |