Compare ZDC Signals
Ultra Peripheral Trigger Minimum Bias Trigger
- Pedestal peak at ADC sum = 4
- Higher ADC values usually in east or west only (beam gas events)
- Single neutron peak around ADC =9
coincident in east and west
hadronic peripheral events
Au+Au -> Au+Au + r0 and Au+Au --> Au*+Au* + r0
Observe two different processes !