Mapping color fluctuations in the photon in ultraperipheral heavy ion   collisions at the Large Hadron Collider
  We model effects of color fluctuations (CFs) in the light-cone photon wave function and for the first time make predictions for the distribution over the number of wounded nucleons $\nu$ in the inelastic photon-nucleus scattering. We show that CFs lead to a dramatic enhancement of this distribution at $\nu=1$ and large $\nu > 10$. We also study the implications of different scales and CFs in the photon wave function on the total transverse energy $\Sigma E_T$ and other observables in inelastic $\gamma A$ scattering with different triggers. Our predictions can be tested in proton-nucleus and nucleus-nucleus ultraperipheral collisions at the LHC and will help to map CFs, whose first indications have already been observed at the LHC. 
M. Alvioli (Perugia U.), L. Frankfurt (Tel Aviv U. and Penn State U.),   V. Guzey (PNPI), M. Strikman (Penn State U.), and M...
hep-ph hep-ex nucl-ex