# What's the potential of the LHC's heavy ion experiment?

RHIC has been the dominant player in heavy ion physics, producing tantalizing evidence in support of the entropy/viscocity formula from AdS/CFT. What's the potential of the LHC's Pb ion collsions? What can it achieve which RHIC can't? What measurements will be improved?

-

• The kinematic range of high-energy nucleon-nucleus collisions extends down to values of Björken $x$ as small as $10^{-6}$ (compared to $10^{-3}$ for RHIC), which expands our knowledge of the nuclear parton distributions (e.g. whether and how well they factorize into individual nucleon PDFs)