Polarized DIS and Spin Puzzle in AdS/CFT

Bowen Xiao
LBNL

AdS/CFT is a powerful tool to investigate gauge theories in strong 
coupling regime.  Recently, we have been able to extend apply AdS/CFT 
to polarized deep-inelastic scattering and calculate polarized 
structure functions both in finite Bjorken-x and small Bjorken-x 
regimes.  In this talk, I will start with introductions to AdS/CFT, 
explain how DIS is modeled in AdS/CFT, then show the results for 
polarized structure functions of a spin-1/2 fermion. In the end, 
I will discuss the spin puzzle in AdS/CFT, and compare with the 
well-known spin puzzle in QCD.