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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2504.19681 |
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| _version_ | 1866913810423480320 |
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| author | Li, Hui Hu, Ting Liu, Liang-Liang Wang, Xiao-Yu Lu, Zhun |
| author_facet | Li, Hui Hu, Ting Liu, Liang-Liang Wang, Xiao-Yu Lu, Zhun |
| contents | We study the $\cos2ϕ$ azimuthal asymmetry in doubly longitudinally polarized proton-proton Drell-Yan collisions within the transverse momentum dependent factorization framework. The asymmetry arises from the convolution of the longitudinal transversity distribution $h_{1L}^{\perp}$ for both protons. Using the Bacchetta-Delcarro-Pisano-Radici-Signori parametrization for the nonperturbative Sudakov form factor and the Wandzura-Wilczek approximation for the collinear $h_{1L}^{\perp}$, we predict the double spin asymmetry $A_{LL}^{\cos2ϕ}$ at RHIC and NICA kinematics. Our results demonstrate sensitivity to sea quark distributions, with the asymmetry reaching up to $25\%$ for maximal sea quark contributions. These predictions highlight the potential of polarized Drell-Yan measurements to probe sea quark dynamics and advance our understanding of nucleon structure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_19681 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The asymmetry $A_{LL}^{\cos2ϕ}$ in the polarized proton-proton Drell-Yan process within TMD factorization Li, Hui Hu, Ting Liu, Liang-Liang Wang, Xiao-Yu Lu, Zhun High Energy Physics - Phenomenology We study the $\cos2ϕ$ azimuthal asymmetry in doubly longitudinally polarized proton-proton Drell-Yan collisions within the transverse momentum dependent factorization framework. The asymmetry arises from the convolution of the longitudinal transversity distribution $h_{1L}^{\perp}$ for both protons. Using the Bacchetta-Delcarro-Pisano-Radici-Signori parametrization for the nonperturbative Sudakov form factor and the Wandzura-Wilczek approximation for the collinear $h_{1L}^{\perp}$, we predict the double spin asymmetry $A_{LL}^{\cos2ϕ}$ at RHIC and NICA kinematics. Our results demonstrate sensitivity to sea quark distributions, with the asymmetry reaching up to $25\%$ for maximal sea quark contributions. These predictions highlight the potential of polarized Drell-Yan measurements to probe sea quark dynamics and advance our understanding of nucleon structure. |
| title | The asymmetry $A_{LL}^{\cos2ϕ}$ in the polarized proton-proton Drell-Yan process within TMD factorization |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2504.19681 |