Perturbative $T$-odd asymmetries in the Drell-Yan process revisited
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910484453654528 |
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| author | Lyubovitskij, Valery E. Vogelsang, Werner Wunder, Fabian Zhevlakov, Alexey S. |
| author_facet | Lyubovitskij, Valery E. Vogelsang, Werner Wunder, Fabian Zhevlakov, Alexey S. |
| contents | We calculate the perturbative $T$-odd contributions to the lepton angular distribution in the Drell-Yan process. Using collinear factorization, we work at the first order in QCD perturbation theory where these contributions appear, ${\cal O}(α_s^2)$, and address both $W^\pm$ and $γ/Z^0$ boson exchange. A major focus of our calculation is on the regime where the boson's transverse momentum $Q_T$ is much smaller than its mass $Q$. We carefully expand our results up to next-to-next-to-leading power in $Q_T/Q$. Our calculation provides a benchmark for studies of $T$-odd contributions that employ transverse-momentum dependent parton distribution functions. In the neutral-current case we compare our results for the $T$-odd structure functions to available ATLAS data. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_18741 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Perturbative $T$-odd asymmetries in the Drell-Yan process revisited Lyubovitskij, Valery E. Vogelsang, Werner Wunder, Fabian Zhevlakov, Alexey S. High Energy Physics - Phenomenology We calculate the perturbative $T$-odd contributions to the lepton angular distribution in the Drell-Yan process. Using collinear factorization, we work at the first order in QCD perturbation theory where these contributions appear, ${\cal O}(α_s^2)$, and address both $W^\pm$ and $γ/Z^0$ boson exchange. A major focus of our calculation is on the regime where the boson's transverse momentum $Q_T$ is much smaller than its mass $Q$. We carefully expand our results up to next-to-next-to-leading power in $Q_T/Q$. Our calculation provides a benchmark for studies of $T$-odd contributions that employ transverse-momentum dependent parton distribution functions. In the neutral-current case we compare our results for the $T$-odd structure functions to available ATLAS data. |
| title | Perturbative $T$-odd asymmetries in the Drell-Yan process revisited |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2403.18741 |