The interactions will be untagged
Energy of Au nucleus 19.7 TeV
Momentum transfer ? 30 MeV
How separate coherent interactions from background? This is important
for the analysis as well as for triggering.
Detailed simulations have been performed using various MC models for the
– Hadronic interactions (FRITIOF+VENUS)
– Beam-gas events (FRITIOF+VENUS)
– (incoherent) photonuclear interactions (DTUNUC)
– cosmic ray muons (HemiCosm)
– debris from upstream interactions
Separation can be achieved by utilizing the characteristics of
coherent events, particularly the low multiplicity and low ?pT.