Charmonium and $e^{+}{e}^{-}$ pair photoproduction at mid-rapidity in ultra-peripheral Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$=2.76 TeV

ALICE Collaboration

The ALICE Collaboration at the LHC has measured the J/$\psi$ and ${\psi }^{{}^{\prime }}$ photoproduction at mid-rapidity in ultra-peripheral Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV. The char…