Difference between revisions of "Mattione Update 06012011"
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| + | == Overview == | ||
| + | |||
| + | * Generated 100000 X(2000) -> b<sub>1</sub>π<sup>-</sup>; events following the instructions [http://www.jlab.org/Hall-D/software/wiki/index.php/HOWTO_simulate_and_analyze_b1pi_events here]. | ||
| + | ** Except ran by linking against the sim-recon-2011-03-31 build. All plots & statistics are from this build unless indicated otherwise. | ||
| + | * Decay chain: | ||
| + | <pre> | ||
| + | gamma p -> p X(2000)0 | ||
| + | | | ||
| + | |-> b1(1235)+ π- | ||
| + | | | ||
| + | |-> ω π+ | ||
| + | | | ||
| + | |-> ρ0 π0 | ||
| + | | |-> γ γ | ||
| + | | | ||
| + | |-> π+ π- | ||
| + | </pre> | ||
| + | |||
| + | === Event Count === | ||
| + | <pre> | ||
| + | # Generated events = 10000 | ||
| + | |||
| + | # Events with 2+ photons = 9669 | ||
| + | # Events with 2+ π+'s = 7749 | ||
| + | # Events with 2+ π-'s = 8248 | ||
| + | # Events with 2+ protons = 1040 (should only be 1 !!) | ||
| + | # Events with enough tracks for the X (2+ photons, 2+ π+'s, 2+ π-'s) = 6259 | ||
| + | </pre> | ||
| + | |||
| + | |||
== X(2000)<sup>0</sup> Mass == | == X(2000)<sup>0</sup> Mass == | ||
* X(2000)<sup>0</sup>: The combination of tracks yielding a mass closest to the X(2000)<sup>0</sup>. | * X(2000)<sup>0</sup>: The combination of tracks yielding a mass closest to the X(2000)<sup>0</sup>. | ||
Revision as of 11:38, 1 June 2011
Overview
- Generated 100000 X(2000) -> b1π-; events following the instructions here.
- Except ran by linking against the sim-recon-2011-03-31 build. All plots & statistics are from this build unless indicated otherwise.
- Decay chain:
gamma p -> p X(2000)0
|
|-> b1(1235)+ π-
|
|-> ω π+
|
|-> ρ0 π0
| |-> γ γ
|
|-> π+ π-
Event Count
# Generated events = 10000 # Events with 2+ photons = 9669 # Events with 2+ π+'s = 7749 # Events with 2+ π-'s = 8248 # Events with 2+ protons = 1040 (should only be 1 !!) # Events with enough tracks for the X (2+ photons, 2+ π+'s, 2+ π-'s) = 6259
X(2000)0 Mass
- X(2000)0: The combination of tracks yielding a mass closest to the X(2000)0.
- 10000 generated events: ~49% reconstruction efficiency, was ~52% on b1pi wiki page.
- However, very significant high-mass tail.
π0 Mass
- π0: The combination of tracks yielding a mass closest to the π0.
- Significantly worse resolution than originally.
- π0: Original version on b1pi wiki page:
γ Reconstruction
- γ's were reconstructed with p & E = 0 until a fix by David Lawrence this morning.
- For each of the generated photons that were matched with reconstructed photons, Δp (generated - reconstructed) vs generated p:
