Difference between revisions of "Solid Background"
From Hall A Wiki
| Line 43: | Line 43: | ||
!9.1k | !9.1k | ||
!24M | !24M | ||
| + | |- | ||
!Energy Flux at large angle EC (GeV/10cm2/s) | !Energy Flux at large angle EC (GeV/10cm2/s) | ||
!3.3k | !3.3k | ||
| Line 54: | Line 55: | ||
* note | * note | ||
** the cut (E>0.9GeV for forward angle EC, E>3.5GeV for large angle EC) is to match SIDIS physics and trigger condition, refer to SIDIS rate estimation at page 48 of [http://hallaweb.jlab.org/collab/PAC/PAC35/PR-10-006-SoLID-Transversity.pdf]. | ** the cut (E>0.9GeV for forward angle EC, E>3.5GeV for large angle EC) is to match SIDIS physics and trigger condition, refer to SIDIS rate estimation at page 48 of [http://hallaweb.jlab.org/collab/PAC/PAC35/PR-10-006-SoLID-Transversity.pdf]. | ||
| − | ** When use the result with the cut to compare to SIDIS rate table, please note SIDIS has a correction factor 2 based on data comparison, refer to page 66 of [http://hallaweb.jlab.org/collab/PAC/PAC35/PR-10-006-SoLID-Transversity.pdf]. So assume the correction is good for all pion | + | ** When use the result with the cut to compare to SIDIS rate table in proposal, please note SIDIS has a correction factor 2 based on data comparison, refer to page 66 of [http://hallaweb.jlab.org/collab/PAC/PAC35/PR-10-006-SoLID-Transversity.pdf]. So assume the correction is good for all pion calculated from Wiser, all numbers for pions in the table should divided by 2 |
| − | ** | + | ** both rate and Energy Flux show the total value integrated over full azimuthal angle. |
=== result of PVDIS for BaBar configuration=== | === result of PVDIS for BaBar configuration=== | ||
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!1663,100 | !1663,100 | ||
|} | |} | ||
| − | + | * note | |
| + | ** comparing to PVDIS rate table in proposal at page 40 of [http://hallaweb.jlab.org/collab/PAC/PAC34/PR-09-012-pvdis.pdf] | ||
| + | ** both rate and Energy Flux show the total value integrated over full azimuthal angle. | ||
== EM energy flux on EC (outdated) == | == EM energy flux on EC (outdated) == | ||
Revision as of 01:12, 1 February 2012
Contents
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 |
- note
- the cut (E>0.9GeV for forward angle EC, E>3.5GeV for large angle EC) is to match SIDIS physics and trigger condition, refer to SIDIS rate estimation at page 48 of [1].
- When use the result with the cut to compare to SIDIS rate table in proposal, please note SIDIS has a correction factor 2 based on data comparison, refer to page 66 of [2]. So assume the correction is good for all pion calculated from Wiser, all numbers for pions in the table should divided by 2
- both rate and Energy Flux show the total value integrated over full azimuthal angle.
result of PVDIS for BaBar configuration
| eDIS (Open) | pi- (Open) | pi+ (Open) | eDIS (baffled) | pi- (baffled) | pi+ (baffled) | |
|---|---|---|---|---|---|---|
| rate at forward angle EC (Hz) | 3M | 5775M | 11697M | 350k | 64M | 110M |
| Energy Flux at forward angle EC (GeV/10cm2/s) (total,peak) | 573, 25 | 4e5,1e4 | 7.6e5,2e4 | 120,6 | 6700,300 | 1663,100 |
- note
- comparing to PVDIS rate table in proposal at page 40 of [3]
- both rate and Energy Flux show the total value integrated over full azimuthal angle.
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.
