Directed flow from parton spin-orbit coupling in pp and pA collisions
We point out a novel mechanism to generate cosϕ two-particle azimuthal correlation (‘directed flow’) in unpolarized proton-proton and proton-nucleus collisions in the forward rapidity region of the projectile proton. This is a direct consequence of the recently discovered strong spin-orbit coupling...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325004708 |
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| _version_ | 1849319484973645824 |
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| author | Sanjin Benić Yoshitaka Hatta |
| author_facet | Sanjin Benić Yoshitaka Hatta |
| author_sort | Sanjin Benić |
| collection | DOAJ |
| description | We point out a novel mechanism to generate cosϕ two-particle azimuthal correlation (‘directed flow’) in unpolarized proton-proton and proton-nucleus collisions in the forward rapidity region of the projectile proton. This is a direct consequence of the recently discovered strong spin-orbit coupling in gluons at small-x. The observable simultaneously serves as a unique probe into the double helicity parton distribution functions of the proton. |
| format | Article |
| id | doaj-art-3cdaa0e7833c458196985c3cd10fdf42 |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-3cdaa0e7833c458196985c3cd10fdf422025-08-20T03:50:26ZengElsevierPhysics Letters B0370-26932025-09-0186813970910.1016/j.physletb.2025.139709Directed flow from parton spin-orbit coupling in pp and pA collisionsSanjin Benić0Yoshitaka Hatta1Department of Physics, Faculty of Science, University of Zagreb, Bijenička c. 32, 10000 Zagreb, Croatia; Corresponding author.Physics Department, Brookhaven National Laboratory, Upton, NY 11973, USA; RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, NY 11973, USAWe point out a novel mechanism to generate cosϕ two-particle azimuthal correlation (‘directed flow’) in unpolarized proton-proton and proton-nucleus collisions in the forward rapidity region of the projectile proton. This is a direct consequence of the recently discovered strong spin-orbit coupling in gluons at small-x. The observable simultaneously serves as a unique probe into the double helicity parton distribution functions of the proton.http://www.sciencedirect.com/science/article/pii/S0370269325004708 |
| spellingShingle | Sanjin Benić Yoshitaka Hatta Directed flow from parton spin-orbit coupling in pp and pA collisions Physics Letters B |
| title | Directed flow from parton spin-orbit coupling in pp and pA collisions |
| title_full | Directed flow from parton spin-orbit coupling in pp and pA collisions |
| title_fullStr | Directed flow from parton spin-orbit coupling in pp and pA collisions |
| title_full_unstemmed | Directed flow from parton spin-orbit coupling in pp and pA collisions |
| title_short | Directed flow from parton spin-orbit coupling in pp and pA collisions |
| title_sort | directed flow from parton spin orbit coupling in pp and pa collisions |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325004708 |
| work_keys_str_mv | AT sanjinbenic directedflowfrompartonspinorbitcouplinginppandpacollisions AT yoshitakahatta directedflowfrompartonspinorbitcouplinginppandpacollisions |