Difference between revisions of "November 23, 2009 (11AM), Physics Working Group"
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== Agenda == | == Agenda == | ||
| − | + | Plan of action for evaluating the effects of a smaller magnetic field: | |
| − | *1. Scale the charged particle momentum resolution in HDParSim. | + | *1. Scale the charged particle momentum resolution in HDParSim. Confirm that delta_p/p scales with the magnetic field as it should. (David) |
| − | *2. Update the acceptance tables in HDParSim to account for changes in geometrical acceptance. | + | *2. Update the acceptance tables in HDParSim to account for any changes in geometrical acceptance. (David) |
| − | *3. Study the EM background levels in the FCAL, TOF, and FDC. | + | *3. Study the EM background levels in the FCAL, TOF, and FDC. (Sasha) |
| − | + | ::The increased backgrounds will require either (a) running at lower luminosity (how much lower?), or (b) increasing the dead area of the FDC or widening the holes in the TOF and FCAL (how much wider?). Choose (a). We should assume we will get the full magnetic field so the detectors will remain as they currently are (i.e. no increased hole sizes). Increased backgrounds would then require running at lower luminosity. | |
| − | *5. | + | *4. Get the kinematic fitter back in a state that it can be used in simulations. (Curtis got the code from Matt Bellis. David is putting it into the repository.) |
| + | |||
| + | *5. Perhaps study missing mass resolution using the kinematic fitter. | ||
::One possible study would be to see how much the background from: | ::One possible study would be to see how much the background from: | ||
| Line 32: | Line 34: | ||
::for different missing mass resolutions. The size of the background could be used as a measure of our sensitivity to an exotic wave (e.g. if the background from the Delta reaction is 10%, it becomes pretty dubious to fish out a 5% signal from the pi+ pi+ pi- n reaction). | ::for different missing mass resolutions. The size of the background could be used as a measure of our sensitivity to an exotic wave (e.g. if the background from the Delta reaction is 10%, it becomes pretty dubious to fish out a 5% signal from the pi+ pi+ pi- n reaction). | ||
| − | *6. Study the | + | *6. Study the effect of increased momentum resolution on PID using the TOF. (Simon) |
| − | + | ||
| − | + | ||
| − | * | + | *7. Look at the omega mass resolution from b1 pi, and the eta (pi+pi-pi0) resolution from eta pi. How much do the backgrounds below the eta and omega increase with increased resolution? (Matt and Ryan) |
* (work done by Pawel: [[Image:eta-sim-at-gluex-prot.pdf]]) | * (work done by Pawel: [[Image:eta-sim-at-gluex-prot.pdf]]) | ||
Latest revision as of 12:19, 24 November 2009
Connect Information
ESNET and EVO will be available:
1. ESNET: 85-42553 (85-HALLD)
2. An EVO room under GlueX will be reserved
Agenda
Plan of action for evaluating the effects of a smaller magnetic field:
- 1. Scale the charged particle momentum resolution in HDParSim. Confirm that delta_p/p scales with the magnetic field as it should. (David)
- 2. Update the acceptance tables in HDParSim to account for any changes in geometrical acceptance. (David)
- 3. Study the EM background levels in the FCAL, TOF, and FDC. (Sasha)
- The increased backgrounds will require either (a) running at lower luminosity (how much lower?), or (b) increasing the dead area of the FDC or widening the holes in the TOF and FCAL (how much wider?). Choose (a). We should assume we will get the full magnetic field so the detectors will remain as they currently are (i.e. no increased hole sizes). Increased backgrounds would then require running at lower luminosity.
- 4. Get the kinematic fitter back in a state that it can be used in simulations. (Curtis got the code from Matt Bellis. David is putting it into the repository.)
- 5. Perhaps study missing mass resolution using the kinematic fitter.
- One possible study would be to see how much the background from:
- gamma p --> pi+ pi+ pi- Delta0; Delta0 --> pi0 n
- leaks into
- gamma p --> pi+ pi+ pi- n
- for different missing mass resolutions. The size of the background could be used as a measure of our sensitivity to an exotic wave (e.g. if the background from the Delta reaction is 10%, it becomes pretty dubious to fish out a 5% signal from the pi+ pi+ pi- n reaction).
- 6. Study the effect of increased momentum resolution on PID using the TOF. (Simon)
- 7. Look at the omega mass resolution from b1 pi, and the eta (pi+pi-pi0) resolution from eta pi. How much do the backgrounds below the eta and omega increase with increased resolution? (Matt and Ryan)
- (work done by Pawel: File:Eta-sim-at-gluex-prot.pdf)
