Difference between revisions of "Mattione Update 06202011"
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== b1pi Invariant Masses == | == b1pi Invariant Masses == | ||
| − | + | * High mass tails due to incorrect photon reconstruction have been removed. These tails were due to photons in the FCAL being reconstructed with vertex-z = 0, such that they had bogus momentum vectors. This was fixed when Miha Kornicer recently updated the photon reconstruction code. | |
| − | [[Image: | + | |
| − | [[Image: | + | * Pi0 invariant mass: |
| − | [[Image: | + | [[Image:Mattione_Update_06012011_InvMass_Pi0.gif|thumb|left|400px|pi0 06/01]] |
| − | [[Image:Mattione_Study_b1pi_InvMass_X2000.gif|thumb|left|400px]] | + | [[Image:Mattione_Study_b1pi_InvMass_PiZero.gif|thumb|left|400px|pi0 Current]] |
| + | <br style="clear:both;"/> | ||
| + | |||
| + | * X(2000) invariant mass: | ||
| + | [[Image:Mattione_Update_06012011_InvMass_X2000.gif|thumb|left|400px|X(2000) 06/01]] | ||
| + | [[Image:Mattione_Study_b1pi_InvMass_X2000.gif|thumb|left|400px|X(2000) Current]] | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
Revision as of 11:14, 20 June 2011
b1pi Overview
- Generated 10000 X(2000) -> b1π-; events following the instructions here.
- Decay chain:
gamma p -> p X(2000)0
|
|-> b1(1235)+ π-
|
|-> ω π+
|
|-> ρ0 π0
| |-> γ γ
|
|-> π+ π-
b1pi Event Count
# Generated events = 10000 # Events with 2+ photons = 9660 # Events with 2+ π+'s = 7642 # Events with 2+ π-'s = 8156 # Events with 2+ protons = 1040 (should only be 1 !!) # Events with enough tracks for the X (2+ photons, 2+ π+'s, 2+ π-'s) = 6076
b1pi Invariant Masses
- High mass tails due to incorrect photon reconstruction have been removed. These tails were due to photons in the FCAL being reconstructed with vertex-z = 0, such that they had bogus momentum vectors. This was fixed when Miha Kornicer recently updated the photon reconstruction code.
- Pi0 invariant mass:
- X(2000) invariant mass:
