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| Format: | Preprint |
| Published: |
2024
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| Online Access: | https://arxiv.org/abs/2404.06905 |
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| _version_ | 1866909208833687552 |
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| author | Jung, H. |
| author_facet | Jung, H. |
| contents | The role of soft gluons in inclusive collinear parton densities as well as in Transverse Momentum Dependent (TMD) parton densities is discussed. Applying the Parton-Branching (PBM) method, the so-called non-perturbative Sudakov form factor could be identified with the integration range $z \to 1$, which is neglected in collinear parton shower approaches.
The importance of soft gluons could be shown by investigating the transverse momentum spectrum of Drell-Yan lepton pairs, leading to a width of the intrinsic-$k_T$ distribution which is independent on $\sqrt{s}$ , in contrast to what is observed in parton shower approaches. The reason for this behavior is traced back to the non-perturbative Sudakov form factor. The role of soft gluons for observable hadron spectra is discussed and shown to be negligible.
This talk is dedicated to the memory of S. Jadach. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_06905 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The non-perturbative Sudakov Form Factor and the role of soft gluons Jung, H. High Energy Physics - Phenomenology The role of soft gluons in inclusive collinear parton densities as well as in Transverse Momentum Dependent (TMD) parton densities is discussed. Applying the Parton-Branching (PBM) method, the so-called non-perturbative Sudakov form factor could be identified with the integration range $z \to 1$, which is neglected in collinear parton shower approaches. The importance of soft gluons could be shown by investigating the transverse momentum spectrum of Drell-Yan lepton pairs, leading to a width of the intrinsic-$k_T$ distribution which is independent on $\sqrt{s}$ , in contrast to what is observed in parton shower approaches. The reason for this behavior is traced back to the non-perturbative Sudakov form factor. The role of soft gluons for observable hadron spectra is discussed and shown to be negligible. This talk is dedicated to the memory of S. Jadach. |
| title | The non-perturbative Sudakov Form Factor and the role of soft gluons |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2404.06905 |