Difference between revisions of "Mattione Update 06012011"
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* Generated and analyzed 10000 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]. | * Generated and analyzed 10000 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]. | ||
− | ** Run using the latest build from this morning. | + | ** Run using the latest build from this morning (contains fixes by David Lawrence on how the track vertexes are used to reconstruct events). |
* Decay chain: | * Decay chain: | ||
<pre> | <pre> | ||
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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 original 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]] | ||
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== π<sup>0</sup> Mass == | == π<sup>0</sup> Mass == | ||
* π<sup>0</sup>: The combination of tracks yielding a mass closest to the π<sup>0</sup>. | * π<sup>0</sup>: The combination of tracks yielding a mass closest to the π<sup>0</sup>. | ||
− | * Significantly worse resolution than originally. | + | * Significantly worse resolution than originally: may now be more realistic, because reconstructed vertex is now used instead of the center of the target. |
[[Image:Mattione_Update_06012011_InvMass_Pi0.gif|thumb|left|600px|Code as of 06/01/2011]] | [[Image:Mattione_Update_06012011_InvMass_Pi0.gif|thumb|left|600px|Code as of 06/01/2011]] | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
− | * π<sup>0</sup>: Original version on b1pi wiki page: | + | * π<sup>0</sup>: Original version on the [http://www.jlab.org/Hall-D/software/wiki/index.php/HOWTO_simulate_and_analyze_b1pi_events original b1pi wiki page]: |
[[Image:20100114_mass_pi0.png|thumb|left|600px|Original version on b1pi wiki page]] | [[Image:20100114_mass_pi0.png|thumb|left|600px|Original version on b1pi wiki page]] | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | == Other Particle Masses == | ||
+ | === ρ<sup>0</sup> Mass === | ||
+ | * ρ<sup>0</sup>: | ||
+ | [[Image:Mattione_Update_06012011_InvMass_Rho0.gif|left|600px]] | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === ω Mass === | ||
+ | * ω: | ||
+ | [[Image:Mattione_Update_06012011_InvMass_Omega.gif|left|600px]] | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === b<sub>1</sub> Mass === | ||
+ | * b<sub>1</sub>: | ||
+ | [[Image:Mattione_Update_06012011_InvMass_B1.gif|left|600px]] | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
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== γ Reconstruction == | == γ Reconstruction == | ||
* γ's were reconstructed with p & E = 0 until a fix by David Lawrence this morning. | * γ's were reconstructed with p & E = 0 until a fix by David Lawrence this morning. | ||
− | * For each of the | + | * For each of the reconstructed photons that were matched with generated photons, Δp (reconstructed - generated) vs reconstructed p: |
− | [[Image:Mattione_Update_06012011_PhotonDeltaPVsP.gif|thumb|left|600px|Code as of 06/01/2011, Δp ( | + | [[Image:Mattione_Update_06012011_PhotonDeltaPVsP.gif|thumb|left|600px|Code as of 06/01/2011, Δp (reconstructed - generated) vs reconstructed p]] |
<br style="clear:both;"/> | <br style="clear:both;"/> |
Latest revision as of 15:08, 2 June 2011
Contents
Overview
- Generated and analyzed 10000 X(2000) -> b1π-; events following the instructions here.
- Run using the latest build from this morning (contains fixes by David Lawrence on how the track vertexes are used to reconstruct events).
- 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 original 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: may now be more realistic, because reconstructed vertex is now used instead of the center of the target.
- π0: Original version on the original b1pi wiki page:
Other Particle Masses
ρ0 Mass
- ρ0:
ω Mass
- ω:
b1 Mass
- b1:
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 reconstructed photons that were matched with generated photons, Δp (reconstructed - generated) vs reconstructed p: