Difference between revisions of "Mattione Kaon PID Studies eta1Prime(2300)"
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== Reaction == | == Reaction == | ||
| − | * γ p → η'(2300), p | + | * γ p → η'<sub>1</sub>(2300), p |
| − | ** η'(2300) → K*(892)<sup>0</sup>, K<sup>0</sup>_bar | + | ** η'<sub>1</sub>(2300) → K*(892)<sup>0</sup>, K<sup>0</sup>_bar |
*** K*(892)<sup>0</sup> → K<sup>+</sup>, π<sup>-</sup> | *** K*(892)<sup>0</sup> → K<sup>+</sup>, π<sup>-</sup> | ||
**** K<sup>0</sup>_bar → π<sup>+</sup>, π<sup>-</sup> | **** K<sup>0</sup>_bar → π<sup>+</sup>, π<sup>-</sup> | ||
Revision as of 17:23, 13 September 2012
Reaction
- γ p → η'1(2300), p
- η'1(2300) → K*(892)0, K0_bar
- K*(892)0 → K+, π-
- K0_bar → π+, π-
- K*(892)0 → K+, π-
- η'1(2300) → K*(892)0, K0_bar
- Final State: p, K+, π-, π+, π-
- Events generated with: Γη'1(2300) = 200 MeV/c2, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
Analysis Overview
- For each q = +/- particle in the reaction, all detected q = +/- tracks are tested as to whether or not they are that particle
- e.g. If a q = + track has PID FOM > 1% for both the π+ & K+: allow both combinations (DO NOT take the best FOM as true!)
- Maximum of 8 tracks per event (to cut down on memory spikes).
- The analysis (cuts/histing/kinfits) is then performed on each possible track combination (events are only cut if every one of their track combinations is cut):
- Required 45.0 < Track-Vertex-Z (cm) < 85.0
- Require the combined FOM for PID (χ2 and NDF of all tracks summed together) be > 1%
- Placed VERY wide cuts on the non-signal invariant mass peaks: reduces # of bogus track combinations to save time / cleanup histograms
- Where kinematic fit: Require that the confidence level from the kinematic fit be > 1%
