Meson Photoproduction in Ultrarelativistic Heavy Ion Collisions

Figure 1

The invariant cross section of large- meson production from gluon-gluon interaction at midrapidity in p-p collisions ( and ) and Pb-Pb collisions ( and ) at the LHC. The dashed line (red line) is for the initial gluon-gluon interaction (LO), the dotted line (blue line) for the semielastic hard photoproduction g-g processes (semi.), the dashed-dotted line (wine line) for the inelastic hard photoproduction g-g processes (inel.), and the solid line (black line) for the sum of the above processes.

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