Year: 2018
Type: article
Abstract: We suggest inclusive hadron production in ultraperipheral proton-nucleus collisions (UPCs) ${p}^{\ensuremath{\uparrow}}A\ensuremath{\rightarrow}hAX$ as a new channel to investigate single spin asymmetries, in particular, to test the assumed dominance of the contribution from twist-3 fragmentation functions. The UPC cross sections are obtained by considering the photoproduction limit of semi-inclusive deep inelastic scattering. In particular, we find simple formulas for the polarized UPC cross sections in the collinear twist-3 framework. We then numerically calculate the fragmentation contribution to single spin asymmetry in ${p}^{\ensuremath{\uparrow}}A\ensuremath{\rightarrow}\ensuremath{\pi}AX$ at $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$ and find a few percent asymmetry in the forward region.
Authors: Sanjin Benić, Yoshitaka Hatta
Institutions: Kyoto University, Yukawa Institute for Theoretical Physics
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2810217751