Difference between revisions of "Mattione Kaon PID Studies h2Prime(2600)"
From GlueXWiki
(Created page with "== Reaction == * γ p → h'<sub>2</sub>(2600), p ** h'<sub>2</sub>(2600) → K<sub>1</sub>(1400)<sup>+</sup>, K<sup>-</sup> *** K<sub>1</sub>(1400)<sup>+</sup> →...") |
|||
| Line 6: | Line 6: | ||
* Final State: p, K<sup>-</sup>, π<sup>+</sup>, K<sup>+</sup>, π<sup>-</sup> | * Final State: p, K<sup>-</sup>, π<sup>+</sup>, K<sup>+</sup>, π<sup>-</sup> | ||
* Events generated with: Γ<sub>h'<sub>2</sub>(2600)</sub> = 100 MeV/c<sup>2</sup>, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0 | * Events generated with: Γ<sub>h'<sub>2</sub>(2600)</sub> = 100 MeV/c<sup>2</sup>, 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<sup>+</sup> & K<sup>+</sup>: 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 (χ<sup>2</sup> 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% | ||
Revision as of 17:22, 13 September 2012
Reaction
- γ p → h'2(2600), p
- h'2(2600) → K1(1400)+, K-
- K1(1400)+ → K*(892)0, π+
- K*(892)0 → K+, π-
- K1(1400)+ → K*(892)0, π+
- h'2(2600) → K1(1400)+, K-
- Final State: p, K-, π+, K+, π-
- Events generated with: Γh'2(2600) = 100 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%
