Heavy-quark box-loop corrections to $q\bar q \to Zγ$ at two loops in QCD
Fuente:
arXiv
Guardado en:
| Autores principales: | , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2026
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866912940473450496 |
|---|---|
| author | Kermanschah, Dario Vicini, Matilde |
| author_facet | Kermanschah, Dario Vicini, Matilde |
| contents | We numerically compute the two-loop QCD corrections to $Zγ$ production at the LHC mediated by light- and heavy-quark box loops. The calculation employs the pipeline of refs. arXiv:2407.18051 and arXiv:2510.18801, which performs Monte Carlo integration over spatial loop momenta after local subtraction of infrared, ultraviolet, and threshold singularities. We validate our results for partonic squared matrix elements with massless-quark loops against known benchmarks, extend them to include heavy-quark contributions, and compute the double-virtual corrections to $pp\to Zγ$ by performing the loop and phase space integrations simultaneously. This computation demonstrates the flexibility of the approach in handling both massless and massive final-state bosons, as well as additional mass scales in the loop. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03169 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Heavy-quark box-loop corrections to $q\bar q \to Zγ$ at two loops in QCD Kermanschah, Dario Vicini, Matilde High Energy Physics - Phenomenology We numerically compute the two-loop QCD corrections to $Zγ$ production at the LHC mediated by light- and heavy-quark box loops. The calculation employs the pipeline of refs. arXiv:2407.18051 and arXiv:2510.18801, which performs Monte Carlo integration over spatial loop momenta after local subtraction of infrared, ultraviolet, and threshold singularities. We validate our results for partonic squared matrix elements with massless-quark loops against known benchmarks, extend them to include heavy-quark contributions, and compute the double-virtual corrections to $pp\to Zγ$ by performing the loop and phase space integrations simultaneously. This computation demonstrates the flexibility of the approach in handling both massless and massive final-state bosons, as well as additional mass scales in the loop. |
| title | Heavy-quark box-loop corrections to $q\bar q \to Zγ$ at two loops in QCD |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.03169 |