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arXiv · 2410.20917

Transverse spin correlation of back-to-back dihadron in unpolarized collisions

Lei Yang·Yu-Kun Song·Shu-Yi Wei
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Abstract

The spin correlation of back-to-back dihadron emerges in unpolarized high-energy collision, empowering unpolarized experiments to shed light on the spin-dependent fragmentation functions. This work investigates the transverse spin correlation of back-to-back dihadron in unpolarized $e^+e^-$, $pp$, and $\gamma p$ collisions, which serves as a novel probe of the chiral-odd fragmentation function $H_{1T}(z)$. We compute the transverse spin correlation at the partonic level and establish a connection with helicity amplitudes. Measuring this observable in future experiments can reveal valuable information on the hadronization of transversely polarized quarks.

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Lei Yang, Yu-Kun Song, Shu-Yi Wei. 2024-10-28. Transverse spin correlation of back-to-back dihadron in unpolarized collisions. https://arxiv.org/abs/2410.20917

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