Tensor-polarized structure function $b_1$ by convolution picture for deuteron

Understand

There are polarized structure functions $b_{1-4}$ for the spin-1 deuteron.

• We calculated the leading-twist tensor structure function $b_1$ by using convolution description for the deuteron.
• We found large differences between our theoretical functions and HERMES experimental data on $b_1$.
• Although higher-twist effects should be considered in obtaining experimental $b_1$, it suggests a possible existence of new hadron physics mechanism for spin-1 hadrons.