Difference between revisions of "Mattione Update 06012011"
From GlueXWiki
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== 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>. | ||
| − | * 10000 generated events: ~63% reconstruction efficiency, was ~52% on b1pi wiki page. | + | * 10000 generated events: ~63% reconstruction efficiency, was ~52% on the [http://www.jlab.org/Hall-D/software/wiki/index.php/HOWTO_simulate_and_analyze_b1pi_events b1pi wiki page]. |
* However, very significant high-mass tail. | * However, very significant high-mass tail. | ||
[[Image:Mattione_Update_06012011_InvMass_X2000.gif|thumb|left|600px|Code as of 06/01/2011]] | [[Image:Mattione_Update_06012011_InvMass_X2000.gif|thumb|left|600px|Code as of 06/01/2011]] | ||
Revision as of 13:19, 1 June 2011
Overview
- Generated and analyzed 10000 X(2000) -> b1π-; events following the instructions here.
- Run using the latest build from this morning.
- Decay chain:
gamma p -> p X(2000)0
|
|-> b1(1235)+ π-
|
|-> ω π+
|
|-> ρ0 π0
| |-> γ γ
|
|-> π+ π-
X(2000)0 Mass
- X(2000)0: The combination of tracks yielding a mass closest to the X(2000)0.
- 10000 generated events: ~63% reconstruction efficiency, was ~52% on the 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:
Track Multiplicity
# 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
- # Photons per Event
- # π+'s per Event
- # π-'s per Event
- # Protons per Event
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:
