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arXiv · 2412.00394

Helicity correlation of neighboring dihadron

Fei Huang·Tianbo Liu·Yu-Kun Song·Shu-Yi Wei
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Abstract

The spin correlation of final-state hadrons provides a novel platform to explore the hadronization mechanism of polarized partons in unpolarized high-energy collisions. In this work, we investigate the helicity correlation of two hadrons originating from the same single parton. The production of such a dihadron system is formally described by the interference dihadron fragmentation function, in which the helicity correlation between the two hadrons arise from both the long-distance nonperturbative physics and the perturbative QCD evolution. Beyond the extraction of the dihadron fragmentation function, we demonstrate that it is also a sensitive observable to the longitudinal spin transfer, characterized by the single hadron fragmentation function $G_{1L}$. This intriguing connection opens up new opportunities for understanding the spin dynamics of hadronization and provides a complementary approach to corresponding studies using polarized beams and targets.

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Fei Huang, Tianbo Liu, Yu-Kun Song, Shu-Yi Wei. 2024-11-30. Helicity correlation of neighboring dihadron. https://arxiv.org/abs/2412.00394

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