Difference between revisions of "Mattione Update 08102011"

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(Invariant Masses)
 
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== Invariant Masses ==
 
== Invariant Masses ==
 
* Pi0 invariant mass:
 
[[Image:Mattione_Update_08102011_InvMass_Pi0.gif|thumb|left|400px|pi0 08/10]]
 
<br style="clear:both;"/>
 
  
 
* X(2000) invariant mass:
 
* X(2000) invariant mass:

Latest revision as of 11:40, 10 August 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-

Counts

  • Significantly fewer pions than from June 12th. However, also significantly fewer protons. This is almost entirely independent of the recent update of the particle class structure (slightly modified PID algorithm resulted in less than 0.2% change in the counts for each particle type).
JUNE 12th COUNTS
# 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


AUGUST 9th COUNTS
# Generated events = 10000

# Events with 2+ photons = 9884
# Events with 2+ π+'s = 6506
# Events with 2+ π-'s = 6026
# Events with 2+ protons = 104 (should only be 1 !!)
# Events with enough tracks for the X (2+ photons, 2+ π+'s, 2+ π-'s) = 3743

Invariant Masses

  • X(2000) invariant mass:
X(2000) 08/10 (Current)
X(2000) 06/20