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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.16450 |
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| _version_ | 1866917279414878208 |
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| author | Berg, Dario van den Kolbe, Isobel |
| author_facet | Berg, Dario van den Kolbe, Isobel |
| contents | We present a detailed study of momentum broadening for high-energy partons traversing the Quark-Gluon Plasma (QGP), extending the Gyulassy-Levai-Vitev (GLV) formalism to include both all-path-length (APL) and sub-eikonal corrections. Traditional GLV calculations rely on the large separation distance and large formation time approximations, which are valid for large systems, but whose applicability in small systems such as pp and p/dA may fail. We derive analytic expressions for the momentum broadening distributions to first order in the opacity expansion, and perform a numerical investigation to quantify their impact. Our results show that the APL result reduces the low-momentum broadening and the sub-eikonal correction enhances the high-momentum broadening. The combined APL and sub eikonal correction show that the sub-eikonal correction mitigates the effect of the APL correction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_16450 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | All-path-length and sub-eikonal corrections to momentum broadening in the opacity expansion approach Berg, Dario van den Kolbe, Isobel High Energy Physics - Phenomenology Nuclear Theory We present a detailed study of momentum broadening for high-energy partons traversing the Quark-Gluon Plasma (QGP), extending the Gyulassy-Levai-Vitev (GLV) formalism to include both all-path-length (APL) and sub-eikonal corrections. Traditional GLV calculations rely on the large separation distance and large formation time approximations, which are valid for large systems, but whose applicability in small systems such as pp and p/dA may fail. We derive analytic expressions for the momentum broadening distributions to first order in the opacity expansion, and perform a numerical investigation to quantify their impact. Our results show that the APL result reduces the low-momentum broadening and the sub-eikonal correction enhances the high-momentum broadening. The combined APL and sub eikonal correction show that the sub-eikonal correction mitigates the effect of the APL correction. |
| title | All-path-length and sub-eikonal corrections to momentum broadening in the opacity expansion approach |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2602.16450 |