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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2023
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2312.13687 |
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| _version_ | 1866929299475398656 |
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| author | Ermolaev, B. I. Troyan, S. I. |
| author_facet | Ermolaev, B. I. Troyan, S. I. |
| contents | Dispersion Relations (DR) are known to be a powerful instrument for studying scattering amplitudes. In particular, they often apply to calculations in Perturbative QCD and Standard Model. We argue that applying DR to amplitudes with double-logarithmic (DL) contributions should be done with a proper caution because DL terms are often infrared-divergent. Ignoring this circumstance leads to incorrect results. As an example of such situation, we consider applying DR to decays of on-shell W and Z -bosons into fermion pairs in the Double-Logarithmic Approximation |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_13687 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Comment on applying dispersion relations to amplitudes with infrared singularities Ermolaev, B. I. Troyan, S. I. High Energy Physics - Phenomenology Dispersion Relations (DR) are known to be a powerful instrument for studying scattering amplitudes. In particular, they often apply to calculations in Perturbative QCD and Standard Model. We argue that applying DR to amplitudes with double-logarithmic (DL) contributions should be done with a proper caution because DL terms are often infrared-divergent. Ignoring this circumstance leads to incorrect results. As an example of such situation, we consider applying DR to decays of on-shell W and Z -bosons into fermion pairs in the Double-Logarithmic Approximation |
| title | Comment on applying dispersion relations to amplitudes with infrared singularities |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2312.13687 |