Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-06-29
Nucl.Phys.Proc.Suppl. 82 (2000) 409-413
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, to be published in the proceedings of the Photon'99 conference
Scientific paper
10.1016/S0920-5632(00)00186-9
Due to the coherence of all the protons in a nucleus, there are very strong electromagnetic fields of short duration in relativistic heavy ion collisions. They give rise to quasireal photon-photon and photon-nucleus collisions with a large flux. RHIC will begin its experimental program this year and such types of collisions will be studied experimentally at the STAR detector. RHIC will have the highest flux of (quasireal) photons up to now in the GeV region. At the LHC the invariant mass range available in gamma-gamma-interactions will be of the order of 100 GeV, i.e., in the range currently available at LEP2, but with a higher gamma-gamma-luminosity. Therefore one has there also the potential to study new physics. (Quasireal) photon-hadron (i.e., photon-nucleus) interactions can be studied as well, similar to HERA, at higher invariant masses. Vector mesons can be produced coherently through photon-Pomeron and photon-meson interactions in exclusive reactions such as A+A -> A+A+V, where A is the heavy ion and V=rho,omega,phi or J/Psi.
Baur Gerhard
Hencken Kai
Stagnoli P.
Trautmann Dirk
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