Difference between revisions of "Mattione Update 07092012"
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== Y(2175) Study Statistics == | == Y(2175) Study Statistics == | ||
+ | * % of events & track combinations that survive cuts and are near the signal peak. | ||
+ | ** NOTE: Final column is "rough" because I assumed that the track combination / event ratio is mass-independent (I just multiplied columns 2 & 4) | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="50"| Reaction | ||
+ | !width="200"| # Generated Events | ||
+ | !width="200"| % Events Survive Cuts | ||
+ | !width="200"| # Surviving Track Combos / Surviving Event | ||
+ | !width="200"| % Surviving Track Combos within +/- 2Γ (84.4%) of Y(2175) mass peak | ||
+ | !width="200"| Rough % Generated Events within +/- 2Γ (84.4%) of Y(2175) mass peak | ||
+ | |- | ||
+ | ! Y(2175) | ||
+ | | 323196 || 7.4% || 1.17 || 73.8% || 5.5% | ||
+ | |- | ||
+ | ! f<sub>1</sub>(1285) | ||
+ | | 503125 || 1.6% || 1.13 || 40.4% || 0.65% | ||
+ | |- | ||
+ | ! bggen | ||
+ | | 1047972 || 0.044% || 1.31 || 27.8% || 0.012% | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | == &phi<sub>3</sub>(1850) Study Overview == | ||
+ | === Reaction === | ||
+ | * γ p → Y(2175), p | ||
+ | ** Y(2175) → π<sup>+</sup>, π<sup>-</sup>, φ | ||
+ | *** φ → K<sup>+</sup>, K<sup>-</sup> | ||
+ | * Final State: p, π<sup>+</sup>, π<sup>-</sup>, K<sup>+</sup>, K<sup>-</sup> | ||
+ | * ~530,000 Events Generated using genr8 with: 9 GeV Photons, Γ<sub>Y(2175)</sub> = 61 MeV/c<sup>2</sup>, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0 | ||
+ | |||
+ | === Background Channel === | ||
+ | * γ p → f<sub>1</sub>(1285), p | ||
+ | ** f<sub>1</sub>(1285) → π<sup>+</sup>, π<sup>-</sup>, π<sup>+</sup>, π<sup>-</sup> | ||
+ | * NOTE: had to trick genr8 by having the f<sub>1</sub>(1285) decay to η, η, and then each decaying to π<sup>+</sup>, π<sup>-</sup> | ||
+ | * Final State: p, π<sup>+</sup>, π<sup>-</sup>, π<sup>+</sup>, π<sup>-</sup> | ||
+ | * ~530,000 Events Generated using genr8 with: 9 GeV Photons, Γf<sub>1</sub>(1285) = 24 MeV/c<sup>2</sup>, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0 | ||
+ | |||
+ | === bggen === | ||
+ | * Generated entire photon energy region | ||
+ | |||
+ | === 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!) | ||
+ | * 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 reconstruction of 2-to-3 + Tracks, 2 - Tracks (proton is treated as missing) | ||
+ | ** Required 45.0 < Track-Vertex-Z (cm) < 85.0 | ||
+ | ** Required DOCA between tracks < 5.0 cm | ||
+ | ** Require the combined FOM for PID (π<sup>+</sup>, π<sup>-</sup>, K<sup>+</sup>, K<sup>-</sup>) be > 1% | ||
+ | ** Place very loose cuts on the φ invariant mass (0.8 - 1.3) and p missing mass (0.5 - 1.4): reduces # of bogus track combinations to save time / cleanup histograms | ||
+ | ** Phi mass cut: 1.004 < K<sup>+</sup>K<sup>-</sup> Invariant Mass (GeV/c<sup>2</sup>) < 1.04 | ||
+ | ** Kinematic Fit: 4-momentum conservation: p missing mass | ||
+ | ** Require that the confidence level from the kinematic fit be > 1% | ||
+ | |||
+ | == &phi<sub>3</sub>(1850) Study Analysis == | ||
+ | * First Analysis Step: | ||
+ | ** Require reconstruction of 2-to-3 + Tracks, 2 - Tracks (proton is treated as missing) | ||
+ | |||
+ | === Thrown Track Parameters === | ||
+ | * Thrown Track Parameters | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="50"| Track | ||
+ | !width="350"| Y(2175) | ||
+ | !width="350"| f<sub>1</sub>(1285) | ||
+ | !width="350"| bggen | ||
+ | |- | ||
+ | ! γ | ||
+ | | Spike at E = 9.0 GeV || Spike at E = 9.0 GeV || [[Image:Mattione_Update_07092012_ThrownP_Photon_Y2175_Pythia.png|left|350px]] | ||
+ | |- | ||
+ | ! K<sup>+</sup> | ||
+ | | [[Image:Mattione_Update_06252012_ThrownPVsTheta_KPlus.png|left|350px]] || NA || [[Image:Mattione_Update_07092012_ThrownPVsTheta_KPlus_Y2175_Pythia.png|left|350px]] | ||
+ | |- | ||
+ | ! K<sup>-</sup> | ||
+ | | [[Image:Mattione_Update_06252012_ThrownPVsTheta_KMinus.png|left|350px]] || NA || [[Image:Mattione_Update_07092012_ThrownPVsTheta_KMinus_Y2175_Pythia.png|left|350px]] | ||
+ | |- | ||
+ | ! π<sup>+</sup> | ||
+ | | [[Image:Mattione_Update_06252012_ThrownPVsTheta_PiPlus.png|left|350px]] || [[Image:Mattione_Update_07092012_ThrownPVsTheta_PiPlus_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_ThrownPVsTheta_PiPlus_Y2175_Pythia.png|left|350px]] | ||
+ | |- | ||
+ | ! π<sup>-</sup> | ||
+ | | [[Image:Mattione_Update_06252012_ThrownPVsTheta_PiMinus.png|left|350px]] || [[Image:Mattione_Update_07092012_ThrownPVsTheta_PiMinus_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_ThrownPVsTheta_PiMinus_Y2175_Pythia.png|left|350px]] | ||
+ | |- | ||
+ | ! p | ||
+ | | [[Image:Mattione_Update_06252012_ThrownPVsTheta_Proton.png|left|350px]] || [[Image:Mattione_Update_07092012_ThrownPVsTheta_Proton_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_ThrownPVsTheta_Proton_Y2175_Pythia.png|left|350px]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === Initial Mass Peaks === | ||
+ | * Next Analysis Steps: | ||
+ | ** Required 45.0 < Track-Vertex-Z (cm) < 85.0 | ||
+ | ** Required DOCA between tracks < 5.0 cm | ||
+ | ** Require the combined FOM for PID (π<sup>+</sup>, π<sup>-</sup>, K<sup>+</sup>, K<sup>-</sup>) be > 1% | ||
+ | |||
+ | * Initial Mass Peaks | ||
+ | ** Note: The peak in the f<sub>1</sub>(1285) φ-mass plot is due to my forcing the f<sub>1</sub>(1285) to decay to ηη, with each η decaying to π<sup>+</sup>π<sup>-</sup>. | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="50"| Mass Peak | ||
+ | !width="350"| Y(2175) | ||
+ | !width="350"| f<sub>1</sub>(1285) | ||
+ | !width="350"| bggen | ||
+ | |- | ||
+ | ! φ | ||
+ | | [[Image:Mattione_Update_07092012_Mass_Phi_Y2175.png|left|350px]] || [[Image:Mattione_Update_07092012_Mass_Phi_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_Mass_Phi_Y2175_Pythia.png|left|350px]] | ||
+ | |- | ||
+ | ! p | ||
+ | | [[Image:Mattione_Update_07092012_Mass_Proton_Y2175.png|left|350px]] || [[Image:Mattione_Update_07092012_Mass_Proton_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_Mass_Proton_Y2175_Pythia.png|left|350px]] | ||
+ | |- | ||
+ | ! Y(2175) | ||
+ | | [[Image:Mattione_Update_07092012_Mass_Y2175_Y2175.png|left|350px]] || [[Image:Mattione_Update_07092012_Mass_Y2175_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_Mass_Y2175_Y2175_Pythia.png|left|350px]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === Kinematic Fitting === | ||
+ | * Next Analysis Steps: | ||
+ | ** Place very loose cuts on the φ invariant mass (0.8 - 1.3) and p missing mass (0.5 - 1.4): reduces # of bogus track combinations to save time / cleanup histograms | ||
+ | ** Phi mass cut: 1.004 < K<sup>+</sup>K<sup>-</sup> Invariant Mass (GeV/c<sup>2</sup>) < 1.04 | ||
+ | ** Kinematic Fit: 4-momentum conservation: p missing mass | ||
+ | |||
+ | * Confidence Level | ||
+ | ** NOTE: The pulls had sigmas of ~1.5 - 1.6, and the p_z means were +/- 0.2 (other means were 0). This is possibly due to my having an incorrect variance for the photon energy, and combinatoric background seeping into the distributions. | ||
+ | ** NOTE: the spike at zero for these distributions is way above the top of the plots. | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="50"| Fit Constraint | ||
+ | !width="350"| Y(2175) | ||
+ | !width="350"| f<sub>1</sub>(1285) | ||
+ | !width="350"| bggen | ||
+ | |- | ||
+ | ! (p) | ||
+ | | [[Image:Mattione_Update_07092012_KinFit_ConfidenceLevel_Y2175.png|left|350px]] || [[Image:Mattione_Update_07092012_KinFit_ConfidenceLevel_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_KinFit_ConfidenceLevel_Y2175_Pythia.png|left|350px]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === Final Mass Peaks === | ||
+ | * Final Analysis Step: | ||
+ | ** Require that the confidence level from the kinematic fit be > 1% | ||
+ | |||
+ | * Final Mass Peaks | ||
+ | ** NOTE: proton peak uses pre-kinfit track momentum, Y(2175) peak uses post-kinfit track momentum | ||
+ | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
+ | !width="50"| Mass Peak | ||
+ | !width="350"| Y(2175) | ||
+ | !width="350"| f<sub>1</sub>(1285) | ||
+ | !width="350"| bggen | ||
+ | |- | ||
+ | ! p | ||
+ | | [[Image:Mattione_Update_07092012_FinalMass_Proton_Y2175.png|left|350px]] || [[Image:Mattione_Update_07092012_FinalMass_Proton_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_FinalMass_Proton_Y2175_Pythia.png|left|350px]] | ||
+ | |- | ||
+ | ! Y(2175) | ||
+ | | [[Image:Mattione_Update_07092012_FinalMass_Y2175_Y2175.png|left|350px]] || [[Image:Mattione_Update_07092012_FinalMass_Y2175_Y2175_f11285.png|left|350px]] || [[Image:Mattione_Update_07092012_FinalMass_Y2175_Y2175_Pythia.png|left|350px]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | == &phi<sub>3</sub>(1850) Study Statistics == | ||
* % of events & track combinations that survive cuts and are near the signal peak. | * % of events & track combinations that survive cuts and are near the signal peak. | ||
** NOTE: Final column is "rough" because I assumed that the track combination / event ratio is mass-independent (I just multiplied columns 2 & 4) | ** NOTE: Final column is "rough" because I assumed that the track combination / event ratio is mass-independent (I just multiplied columns 2 & 4) |
Revision as of 23:49, 8 July 2012
Contents
Y(2175) Study Overview
Reaction
- γ p → Y(2175), p
- Y(2175) → π+, π-, φ
- φ → K+, K-
- Y(2175) → π+, π-, φ
- Final State: p, π+, π-, K+, K-
- ~530,000 Events Generated using genr8 with: 9 GeV Photons, ΓY(2175) = 61 MeV/c2, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
Background Channel
- γ p → f1(1285), p
- f1(1285) → π+, π-, π+, π-
- NOTE: had to trick genr8 by having the f1(1285) decay to η, η, and then each decaying to π+, π-
- Final State: p, π+, π-, π+, π-
- ~530,000 Events Generated using genr8 with: 9 GeV Photons, Γf1(1285) = 24 MeV/c2, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
bggen
- Generated entire photon energy region
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!)
- 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 reconstruction of 2-to-3 + Tracks, 2 - Tracks (proton is treated as missing)
- Required 45.0 < Track-Vertex-Z (cm) < 85.0
- Required DOCA between tracks < 5.0 cm
- Require the combined FOM for PID (π+, π-, K+, K-) be > 1%
- Place very loose cuts on the φ invariant mass (0.8 - 1.3) and p missing mass (0.5 - 1.4): reduces # of bogus track combinations to save time / cleanup histograms
- Phi mass cut: 1.004 < K+K- Invariant Mass (GeV/c2) < 1.04
- Kinematic Fit: 4-momentum conservation: p missing mass
- Require that the confidence level from the kinematic fit be > 1%
Y(2175) Study Analysis
- First Analysis Step:
- Require reconstruction of 2-to-3 + Tracks, 2 - Tracks (proton is treated as missing)
Thrown Track Parameters
- Thrown Track Parameters
Track | Y(2175) | f1(1285) | bggen |
---|---|---|---|
γ | Spike at E = 9.0 GeV | Spike at E = 9.0 GeV | |
K+ | NA | ||
K- | NA | ||
π+ | |||
π- | |||
p |
Initial Mass Peaks
- Next Analysis Steps:
- Required 45.0 < Track-Vertex-Z (cm) < 85.0
- Required DOCA between tracks < 5.0 cm
- Require the combined FOM for PID (π+, π-, K+, K-) be > 1%
- Initial Mass Peaks
- Note: The peak in the f1(1285) φ-mass plot is due to my forcing the f1(1285) to decay to ηη, with each η decaying to π+π-.
Mass Peak | Y(2175) | f1(1285) | bggen |
---|---|---|---|
φ | |||
p | |||
Y(2175) |
Kinematic Fitting
- Next Analysis Steps:
- Place very loose cuts on the φ invariant mass (0.8 - 1.3) and p missing mass (0.5 - 1.4): reduces # of bogus track combinations to save time / cleanup histograms
- Phi mass cut: 1.004 < K+K- Invariant Mass (GeV/c2) < 1.04
- Kinematic Fit: 4-momentum conservation: p missing mass
- Confidence Level
- NOTE: The pulls had sigmas of ~1.5 - 1.6, and the p_z means were +/- 0.2 (other means were 0). This is possibly due to my having an incorrect variance for the photon energy, and combinatoric background seeping into the distributions.
- NOTE: the spike at zero for these distributions is way above the top of the plots.
Fit Constraint | Y(2175) | f1(1285) | bggen |
---|---|---|---|
(p) |
Final Mass Peaks
- Final Analysis Step:
- Require that the confidence level from the kinematic fit be > 1%
- Final Mass Peaks
- NOTE: proton peak uses pre-kinfit track momentum, Y(2175) peak uses post-kinfit track momentum
Mass Peak | Y(2175) | f1(1285) | bggen |
---|---|---|---|
p | |||
Y(2175) |
Y(2175) Study Statistics
- % of events & track combinations that survive cuts and are near the signal peak.
- NOTE: Final column is "rough" because I assumed that the track combination / event ratio is mass-independent (I just multiplied columns 2 & 4)
Reaction | # Generated Events | % Events Survive Cuts | # Surviving Track Combos / Surviving Event | % Surviving Track Combos within +/- 2Γ (84.4%) of Y(2175) mass peak | Rough % Generated Events within +/- 2Γ (84.4%) of Y(2175) mass peak |
---|---|---|---|---|---|
Y(2175) | 323196 | 7.4% | 1.17 | 73.8% | 5.5% |
f1(1285) | 503125 | 1.6% | 1.13 | 40.4% | 0.65% |
bggen | 1047972 | 0.044% | 1.31 | 27.8% | 0.012% |
&phi3(1850) Study Overview
Reaction
- γ p → Y(2175), p
- Y(2175) → π+, π-, φ
- φ → K+, K-
- Y(2175) → π+, π-, φ
- Final State: p, π+, π-, K+, K-
- ~530,000 Events Generated using genr8 with: 9 GeV Photons, ΓY(2175) = 61 MeV/c2, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
Background Channel
- γ p → f1(1285), p
- f1(1285) → π+, π-, π+, π-
- NOTE: had to trick genr8 by having the f1(1285) decay to η, η, and then each decaying to π+, π-
- Final State: p, π+, π-, π+, π-
- ~530,000 Events Generated using genr8 with: 9 GeV Photons, Γf1(1285) = 24 MeV/c2, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
bggen
- Generated entire photon energy region
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!)
- 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 reconstruction of 2-to-3 + Tracks, 2 - Tracks (proton is treated as missing)
- Required 45.0 < Track-Vertex-Z (cm) < 85.0
- Required DOCA between tracks < 5.0 cm
- Require the combined FOM for PID (π+, π-, K+, K-) be > 1%
- Place very loose cuts on the φ invariant mass (0.8 - 1.3) and p missing mass (0.5 - 1.4): reduces # of bogus track combinations to save time / cleanup histograms
- Phi mass cut: 1.004 < K+K- Invariant Mass (GeV/c2) < 1.04
- Kinematic Fit: 4-momentum conservation: p missing mass
- Require that the confidence level from the kinematic fit be > 1%
&phi3(1850) Study Analysis
- First Analysis Step:
- Require reconstruction of 2-to-3 + Tracks, 2 - Tracks (proton is treated as missing)
Thrown Track Parameters
- Thrown Track Parameters
Track | Y(2175) | f1(1285) | bggen |
---|---|---|---|
γ | Spike at E = 9.0 GeV | Spike at E = 9.0 GeV | |
K+ | NA | ||
K- | NA | ||
π+ | |||
π- | |||
p |
Initial Mass Peaks
- Next Analysis Steps:
- Required 45.0 < Track-Vertex-Z (cm) < 85.0
- Required DOCA between tracks < 5.0 cm
- Require the combined FOM for PID (π+, π-, K+, K-) be > 1%
- Initial Mass Peaks
- Note: The peak in the f1(1285) φ-mass plot is due to my forcing the f1(1285) to decay to ηη, with each η decaying to π+π-.
Mass Peak | Y(2175) | f1(1285) | bggen |
---|---|---|---|
φ | |||
p | |||
Y(2175) |
Kinematic Fitting
- Next Analysis Steps:
- Place very loose cuts on the φ invariant mass (0.8 - 1.3) and p missing mass (0.5 - 1.4): reduces # of bogus track combinations to save time / cleanup histograms
- Phi mass cut: 1.004 < K+K- Invariant Mass (GeV/c2) < 1.04
- Kinematic Fit: 4-momentum conservation: p missing mass
- Confidence Level
- NOTE: The pulls had sigmas of ~1.5 - 1.6, and the p_z means were +/- 0.2 (other means were 0). This is possibly due to my having an incorrect variance for the photon energy, and combinatoric background seeping into the distributions.
- NOTE: the spike at zero for these distributions is way above the top of the plots.
Fit Constraint | Y(2175) | f1(1285) | bggen |
---|---|---|---|
(p) |
Final Mass Peaks
- Final Analysis Step:
- Require that the confidence level from the kinematic fit be > 1%
- Final Mass Peaks
- NOTE: proton peak uses pre-kinfit track momentum, Y(2175) peak uses post-kinfit track momentum
Mass Peak | Y(2175) | f1(1285) | bggen |
---|---|---|---|
p | |||
Y(2175) |
&phi3(1850) Study Statistics
- % of events & track combinations that survive cuts and are near the signal peak.
- NOTE: Final column is "rough" because I assumed that the track combination / event ratio is mass-independent (I just multiplied columns 2 & 4)
Reaction | # Generated Events | % Events Survive Cuts | # Surviving Track Combos / Surviving Event | % Surviving Track Combos within +/- 2Γ (84.4%) of Y(2175) mass peak | Rough % Generated Events within +/- 2Γ (84.4%) of Y(2175) mass peak |
---|---|---|---|---|---|
Y(2175) | 323196 | 7.4% | 1.17 | 73.8% | 5.5% |
f1(1285) | 503125 | 1.6% | 1.13 | 40.4% | 0.65% |
bggen | 1047972 | 0.044% | 1.31 | 27.8% | 0.012% |