Two-loop renormalisation of quark and gluon fields in the SMEFT
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866910857042067456 |
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| author | Duhr, Claude Vasquez, Andres Ventura, Giuseppe Vryonidou, Eleni |
| author_facet | Duhr, Claude Vasquez, Andres Ventura, Giuseppe Vryonidou, Eleni |
| contents | We compute the contributions of CP-conserving operators in the dimension-six SMEFT to the two-loop renormalisation constants of quark and gluon fields in the $\overline{\textrm{MS}}$-scheme. Specifically, we consider the top-quark chromomagnetic operator and the triple gluon operator. We work with the background-field method, which allows us to extract the contribution of these operators to the two-loop running of the top mass and the strong coupling constant. We discuss in detail the mixing with the unphysical operators required for the renormalisation, and we present analytic results for the renormalisation constants of all relevant operators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01954 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two-loop renormalisation of quark and gluon fields in the SMEFT Duhr, Claude Vasquez, Andres Ventura, Giuseppe Vryonidou, Eleni High Energy Physics - Phenomenology We compute the contributions of CP-conserving operators in the dimension-six SMEFT to the two-loop renormalisation constants of quark and gluon fields in the $\overline{\textrm{MS}}$-scheme. Specifically, we consider the top-quark chromomagnetic operator and the triple gluon operator. We work with the background-field method, which allows us to extract the contribution of these operators to the two-loop running of the top mass and the strong coupling constant. We discuss in detail the mixing with the unphysical operators required for the renormalisation, and we present analytic results for the renormalisation constants of all relevant operators. |
| title | Two-loop renormalisation of quark and gluon fields in the SMEFT |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.01954 |