Odderon mechanism for transverse single spin asymmetry in the Wandzura-Wilczek approximation

Scientific paper - Original scientific paper

• Author: Sanjin Benić
• Author: Davor Horvatić
• Author: Abhiram Kaushik
• Author: Eric Andreas Vivoda
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We compute the transverse single spin asymmetry in forward 𝑝↑𝑝→ℎ𝑋 and 𝑝↑𝐴→ℎ𝑋 collisions from the odderon mechanism originally suggested by Kovchegov and Sievert [Phys. Rev. D 86, 034028 (2012)]. Working in the hybrid approach of the color glass condensate effective theory, we first identify the relevant collinear parton distribution function (PDF) of the transversely polarized proton 𝑝↑ as the intrinsic twist-3 𝑔𝑇(𝑥) distribution. We further argue that the complete polarized cross section also contains contributions from the kinematical and the dynamical twist-3 PDFs, in addition to the intrinsic twist-3 PDF. By restricting to the Wandzura-Wilczek approximation, where the dynamical twist-3 PDFs are dropped, we find that the odderon contribution to the polarized cross section for inclusive hadron production is exactly zero at the next-to-leading order in the strong coupling.

• Keywords (english): transverse single spin asymmetry; Wandzura-Wilczek approximation
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review
• Publication version: Published version
• Journal title: Physical Review D
• Numbering: vol. 106, no. 11, 114025
• p-ISSN: 2470-0010
• e-ISSN: 2470-0029
• DOI: https://doi.org/10.1103/PhysRevD.106.114025
• URN:NBN: urn:nbn:hr:217:335415
• Publication: 2022-12-26
• Project: Number: UIP-2019-04-5332; Title (croatian): Gluonsko zasićenje u visoko energetskim proton-jezgra sudarima - istraživanje novih fenomenoloških smjernica; Title (english): Gluon saturation in high energy proton-nucleus collisions - exploring new phenomenological directions; Acronym: SAT-PHENO; Leader: Sanjin Benić; Jurisdiction: Croatia; Funding stream: Installation Research Projects
• Document URL: https://link.aps.org/doi/10.1103/PhysRevD.106.114025
• Type of resource: Text
• Access conditions: Open access
• Public note: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Received 24 October 2022; accepted 5 December 2022; published 26 December 2022. .
• Created on: 2024-08-03 10:35:40