Solid Background
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Single particle inclusive production
Single particle inclusive production can be signal or background depends on what the studied physics is. But it always add into radiation dose taken by detectors.
How it has been done in the proposals
current study
approach
result of SIDIS for BaBar configuration
| eDIS Cut | eDIS NoCut | pi- Cut | pi- NoCut | pi+ Cut | pi+ NoCut | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| rate at forward angle EC (Hz) | 63k | 63k | 4.9M | 11M | 5.7M | 13M | |||||||
| rate at large angle EC (Hz) | 3.3k | 19k | 9.6k | 20M | 9.1k | 24M | |||||||
| Energy Flux at forward angle EC (GeV/10cm2/s) | 3.3k | 19k | 9.6k | 20M | 9.1k | 24M | Energy Flux at large angle EC (GeV/10cm2/s) | 3.3k | 19k | 9.6k | 20M | 9.1k | 24M |
result of PVDIS for BaBar configuration
EM energy flux on EC (outdated)
- geant3 has EM process total energy cut at 1MeV
- Both SIDIS and PVDIS have confirmed energy flux on EC by the genat3 simulation in the proposals.
- geant4 geometry and materiel checked, no simple mistake found.
- with energy cut on 1MeV, SIDIS geant4 result is close SIDIS geant3, but PVDIS geant4 is still one order larger than PVDIS geant3.
- More careful study like particle type, hit processing under way.
rate on GEM
- rate on GEM need more study, particular from photon-induced rate, SBS has more mature simulation tested with data, their photon-induced rate is about twice of electron rate, need to learn from them.
