Speaker
Christoph Mayer
(Polish Academy of Sciences (PL))
Description
The strong electro-magnetic fields produced by ultra-relativistic heavy ions allow for the study of gamma-gamma and gamma-nucleus processes at the CERN Large Hadron Collider. Here, we report first results obtained by ALICE on the J/psi photo-production cross section in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV, both at forward rapidities (-3.6 < y < -2.6) in the mu+mu- channel, and at central rapidities (-0.9 < y < 0.9) in e+e- and mu+mu- channels. The obtained cross sections are compared with predictions from several models.
In addition, we have measured the cross section of the process gamma-gamma -> e+e- in central rapidity and compared it to the STARLIGHT Monte-Carlo prediction.
Author
Christoph Mayer
(Polish Academy of Sciences (PL))
