Difference between revisions of "Kinematic fitting of ρ and b1π events"
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(→ρ events) |
(→ρ events) |
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** Use default PID algorithm | ** Use default PID algorithm | ||
* 4C kinematic fit (nothing missing) | * 4C kinematic fit (nothing missing) | ||
| − | [[File:rho_mm2.gif | left | frame | Missing mass squared for the reaction γp | + | [[File:rho_mm2.gif | left | frame | Missing mass squared for the reaction γp→pπ-π+. Red histogram is after a 0.01 CL cut on the result of kinematic fitting]] |
[[File:rho_prob.gif]] | [[File:rho_prob.gif]] | ||
<br style="clear: both" /> | <br style="clear: both" /> | ||
| − | <gallery caption="Pull distributions | + | <gallery caption="Pull distributions"> |
File:rho_pim_pull_px.gif | π- px pull | File:rho_pim_pull_px.gif | π- px pull | ||
File:rho_pim_pull_py.gif | π- py pull | File:rho_pim_pull_py.gif | π- py pull | ||
| Line 19: | Line 19: | ||
</gallery> | </gallery> | ||
<br style="clear: both" /> | <br style="clear: both" /> | ||
| + | |||
| + | In the kinematic fitting code, | ||
| + | <blockquote> | ||
| + | Pull = (ν(fit)-ν(meas)) / √(C(meas)-C(fit)) | ||
| + | </blockquote> | ||
== b1π events == | == b1π events == | ||
Revision as of 10:06, 4 April 2012
ρ events
- Generated 100000 events with genr8
- Require pπ+π-, each with tracking CL>0.001
- Use default PID algorithm
- 4C kinematic fit (nothing missing)
Missing mass squared for the reaction γp→pπ-π+. Red histogram is after a 0.01 CL cut on the result of kinematic fitting
- Pull distributions
π- px pull
π- py pull
π- pz pull
π+ px pull
π+ py pull
π+ pz pull
proton px pull
proton py pull
proton pz pull
In the kinematic fitting code,
Pull = (ν(fit)-ν(meas)) / √(C(meas)-C(fit))
b1π events
- Generated 100000 events with genr8
- Require p2π+2π-, each with tracking CL>0.001
- Use default PID algorithm
- 1C kinematic fit (missing π0)
Missing mass squared for the reaction γp->p2π+π-(X). Red histogram is after cutting on CL from kinematic fitting at 0.01.
Black histogram uses momenta from tracking reconstruction; red histogram uses refined momenta returned by kinematic fitting code
