Intrinsic $k_T$ and soft gluons in Monte Carlo event generators
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866918222614233088 |
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| author | Moureaux, Louis Lelek, Aleksandra Hautmann, Francesco Favart, Laurent |
| author_facet | Moureaux, Louis Lelek, Aleksandra Hautmann, Francesco Favart, Laurent |
| contents | Experimental measurements of the transverse momentum of Drell-Yan lepton pairs are sensitive to non-perturbative physics associated with the intrinsic parton transverse momentum $k_T$. We discuss recent determinations of intrinsic $k_T$ in the context of transverse momentum dependent (TMD) parton branching calculations and collinear parton-shower Monte Carlo generators. We illustrate the influence of the soft-gluon resolution scale and the non-perturbative Sudakov region on the intrinsic $k_T$ extraction. We emphasize the relevance of the correct treatment of correlated uncertainties between different transverse momentum bins in TMD fits and present an application to the determination of the intrinsic $k_T$ in the forward rapidity region. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_23291 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Intrinsic $k_T$ and soft gluons in Monte Carlo event generators Moureaux, Louis Lelek, Aleksandra Hautmann, Francesco Favart, Laurent High Energy Physics - Phenomenology Experimental measurements of the transverse momentum of Drell-Yan lepton pairs are sensitive to non-perturbative physics associated with the intrinsic parton transverse momentum $k_T$. We discuss recent determinations of intrinsic $k_T$ in the context of transverse momentum dependent (TMD) parton branching calculations and collinear parton-shower Monte Carlo generators. We illustrate the influence of the soft-gluon resolution scale and the non-perturbative Sudakov region on the intrinsic $k_T$ extraction. We emphasize the relevance of the correct treatment of correlated uncertainties between different transverse momentum bins in TMD fits and present an application to the determination of the intrinsic $k_T$ in the forward rapidity region. |
| title | Intrinsic $k_T$ and soft gluons in Monte Carlo event generators |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.23291 |