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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2505.05963 |
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| _version_ | 1866912367694053376 |
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| author | Li, Yanli She, Keyang Li, Hui Wang, Xiaoyu Li, De-Min Lu, Zhun |
| author_facet | Li, Yanli She, Keyang Li, Hui Wang, Xiaoyu Li, De-Min Lu, Zhun |
| contents | We study the longitudinal beam single-spin asymmetry $A_{LU}^{\sin ϕ_R}$ of dihadron production in semi-inclusive deep inelastic scattering process with a polarized electron beam scattering off an unpolarized proton target. The asymmetry arises from the convolutions of twist-3 PDF $e(x)$ and twist-2 DiFF $H_1^\sphericalangle$ as well as twist-2 PDF $f_1(x)$ and twist-3 DiFF $\widetilde{G}^{\sphericalangle}$. Using the spectator model calculations for the twist-3 PDF $e(x)$, the DiFFs $D_1 , H_1^\sphericalangle$, and $\widetilde{G}^{\sphericalangle}$, we estimate the BSA $A^{\sin ϕ_R}_{LU}$ at the kinematical configuration of CLAS and CLAS12. We find good agreement with $z$- and $M_h$-dependencies data, though $x$- and $Q^2$- dependencies show discrepancies. We include DGLAP evolution of $e(x)$ and provide predictions for COMPASS, EIC, and EicC. The negligible contribution from $f_1(x) \otimes \widetilde{G}^{\sphericalangle}$ supports the Wandzura-Wilczek approximation, while our results highlight the importance of QCD evolution in twist-3 PDF analyses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_05963 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Beam single spin asymmetry $A_{LU}^{\sin ϕ_R}$ of the dihadron production in SIDIS process Li, Yanli She, Keyang Li, Hui Wang, Xiaoyu Li, De-Min Lu, Zhun High Energy Physics - Phenomenology We study the longitudinal beam single-spin asymmetry $A_{LU}^{\sin ϕ_R}$ of dihadron production in semi-inclusive deep inelastic scattering process with a polarized electron beam scattering off an unpolarized proton target. The asymmetry arises from the convolutions of twist-3 PDF $e(x)$ and twist-2 DiFF $H_1^\sphericalangle$ as well as twist-2 PDF $f_1(x)$ and twist-3 DiFF $\widetilde{G}^{\sphericalangle}$. Using the spectator model calculations for the twist-3 PDF $e(x)$, the DiFFs $D_1 , H_1^\sphericalangle$, and $\widetilde{G}^{\sphericalangle}$, we estimate the BSA $A^{\sin ϕ_R}_{LU}$ at the kinematical configuration of CLAS and CLAS12. We find good agreement with $z$- and $M_h$-dependencies data, though $x$- and $Q^2$- dependencies show discrepancies. We include DGLAP evolution of $e(x)$ and provide predictions for COMPASS, EIC, and EicC. The negligible contribution from $f_1(x) \otimes \widetilde{G}^{\sphericalangle}$ supports the Wandzura-Wilczek approximation, while our results highlight the importance of QCD evolution in twist-3 PDF analyses. |
| title | Beam single spin asymmetry $A_{LU}^{\sin ϕ_R}$ of the dihadron production in SIDIS process |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2505.05963 |