Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.19300 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911696932569088 |
|---|---|
| author | Chen, Longjie Yoshida, Shinsuke |
| author_facet | Chen, Longjie Yoshida, Shinsuke |
| contents | We present our results for the twist-3 gluon contribution to the single transverse-spin asymmetry(SSA) in $J/ψ$ production in proton-proton collisions. Although the data were reported by the RHIC experiment more than a decade ago, a theoretical calculation based on rigorous collinear factorization has remained unavailable for the dominant gluonic contribution. Our results show that only the $C$-even type twist-3 gluon distribution, which has a direct relationship with the gluon TMD distribution function, contributes to the $J/ψ$ SSA. Therefore, this observable serves as a key probe to understand the three-dimensional motion of gluons inside the proton. We also perform numerical simulations of the $J/ψ$ SSA at RHIC and LHC energies. Our simulations indicate that a sizable SSA could be generated through a mechanism different from that responsible for the SSA in light hadron and $D$-meson production. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_19300 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The twist-3 gluon contribution to $A_N$ in $J/ψ$ production in $pp$ collisions Chen, Longjie Yoshida, Shinsuke High Energy Physics - Phenomenology We present our results for the twist-3 gluon contribution to the single transverse-spin asymmetry(SSA) in $J/ψ$ production in proton-proton collisions. Although the data were reported by the RHIC experiment more than a decade ago, a theoretical calculation based on rigorous collinear factorization has remained unavailable for the dominant gluonic contribution. Our results show that only the $C$-even type twist-3 gluon distribution, which has a direct relationship with the gluon TMD distribution function, contributes to the $J/ψ$ SSA. Therefore, this observable serves as a key probe to understand the three-dimensional motion of gluons inside the proton. We also perform numerical simulations of the $J/ψ$ SSA at RHIC and LHC energies. Our simulations indicate that a sizable SSA could be generated through a mechanism different from that responsible for the SSA in light hadron and $D$-meson production. |
| title | The twist-3 gluon contribution to $A_N$ in $J/ψ$ production in $pp$ collisions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2605.19300 |