Difference between revisions of "Mattione Study b1pi"

Revision as of 14:54, 2 June 2011 (view source) Pmatt (Talk | contribs) (→‎Comparison of Generated and Reconstructed Tracks) ← Older edit		Revision as of 15:09, 2 June 2011 (view source) Pmatt (Talk | contribs) (→‎Invariant Masses) Newer edit →
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	== Invariant Masses ==		== Invariant Masses ==
	=== &pi;<sup>0</sup> ===		=== &pi;<sup>0</sup> ===
−	* &pi;<sup>0</sup>: Filled for all events with > 1 photon, filled for all possible photon combinations (so if three photons in an event, will fill 3 times).	+	* &pi;<sup>0</sup>
−	* # Events with at least one &pi;<sup>0</sup> candidate: 57866 with sim-recon-2011-03-31, 31071 with code from 05-24-11 at 16:11 (but photon P & E = 0!!)	+	[[Image:Mattione_Study_b1pi_InvMass_PiZero.gif|thumb|left|400px]]
−	[[Image:Mattione_Study_b1pi_InvMass_PiZero.gif|thumb|left|400px|sim-recon-2011-03-31]]	+
	<br style="clear:both;"/>		<br style="clear:both;"/>
	=== &rho;<sup>0</sup> ===		=== &rho;<sup>0</sup> ===
−	* &rho;<sup>0</sup>: Filled for all events with at least one &pi;<sup>+</sup> and at least one &pi;<sup>-</sup>, filled for all possible pion combinations (so if two &pi;<sup>+</sup>'s and two &pi;<sup>-</sup>'s in an event, will fill 4 times).	+	* &rho;<sup>0</sup>
−	* # Events with at least one &rho;<sup>0</sup> candidate: 58466 with sim-recon-2011-03-31, 59178 with code from 05-24-11 at 16:11	+	[[Image:Mattione_Study_b1pi_InvMass_RhoZero.gif|thumb|left|400px]]
−	[[Image:Mattione_Study_b1pi_InvMass_RhoZero.gif|thumb|left|400px|sim-recon-2011-03-31]]	+
	<br style="clear:both;"/>		<br style="clear:both;"/>
	=== &omega; ===		=== &omega; ===
−	* &omega;: Filled for all events with at least: one &pi;<sup>+</sup>, one &pi;<sup>-</sup>, and two photons.  Filled for all possible &rho;<sup>0</sup> combinations, but for events with multiple &pi;<sup>0</sup> candidates the &pi;<sup>0</sup> with the closest mass was chosen.	+	* &omega;
−	* # Events with at least one &omega; candidate: 31012 with sim-recon-2011-03-31	+	[[Image:Mattione_Study_b1pi_InvMass_Omega.gif|thumb|left|400px]]
−	[[Image:Mattione_Study_b1pi_InvMass_Omega.gif|thumb|left|400px|sim-recon-2011-03-31]]	+
	<br style="clear:both;"/>		<br style="clear:both;"/>
	=== b<sub>1</sub> ===		=== b<sub>1</sub> ===
−	* b<sub>1</sub>: Filled for all events with at least: two &pi;<sup>+</sup>'s, one &pi;<sup>-</sup>, and two photons.  Filled for all possible combinations of these tracks (regardless of which &pi;<sup>+</sup> formed the &rho;<sup>0</sup>).	+	* b<sub>1</sub>
−	* # Events with at least one b<sub>1</sub> candidate: 12163 with sim-recon-2011-03-31	+	[[Image:Mattione_Study_b1pi_InvMass_B1Plus.gif|thumb|left|400px]]
−	[[Image:Mattione_Study_b1pi_InvMass_B1Plus.gif|thumb|left|400px|sim-recon-2011-03-31]]	+
	<br style="clear:both;"/>		<br style="clear:both;"/>
	=== X(2000)<sup>0</sup> ===		=== X(2000)<sup>0</sup> ===
−	* X(2000)<sup>0</sup>: Filled for all events with at least: two &pi;<sup>+</sup>'s, two &pi;<sup>-</sup>'s, and two photons.  Filled for all possible combinations of these tracks (regardless of which &pi;<sup>+</sup> & &pi;<sup>-</sup> formed the Rho0).	+	* X(2000)<sup>0</sup>
−	* # Events with at least one X(2000)<sup>0</sup> candidate: 4760 with sim-recon-2011-03-31	+	[[Image:Mattione_Study_b1pi_InvMass_X2000.gif|thumb|left|400px]]
−	[[Image:Mattione_Study_b1pi_InvMass_X2000.gif|thumb|left|400px|sim-recon-2011-03-31]]	+
	<br style="clear:both;"/>		<br style="clear:both;"/>

---

Revision as of 15:09, 2 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 = 100000

# Events with 2+ photons = 57866
# Events with 2+ π+'s = 29372
# Events with 2+ π-'s = 30634
# Events with enough tracks for the X (2+ photons, 2+ π+'s, 2+ π-'s) = 4760

# Events with at least one π0 candidate: 57866
# Events with at least one ρ0 candidate: 58466
# Events with at least one ω candidate: 31012
# Events with at least one b1 candidate: 12163
# Events with at least one X(2000)0 candidate: 4760

• # Photons per Event

• # π⁺'s per Event

• # π^-'s per Event

• # Protons per Event

Invariant Masses

π⁰

• π⁰

ρ⁰

• ρ⁰

ω

• ω

b₁

• b₁

X(2000)⁰

• X(2000)⁰

Comparison of Generated and Reconstructed Tracks

• NOTE: There was no observed φ-dependence on track reconstruction distributions.

γ's

• p vs θ distributions for the generated & reconstructed photons:

π⁺'s

• p vs θ distributions for the generated & reconstructed π⁺'s:

π^-'s

• p vs θ distributions for the generated & reconstructed π^-'s:

p's

• p vs θ distributions for the generated & reconstructed protons: