Difference between revisions of "Mattione Kaon PID Studies Y2175"

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(→‎Mass Peaks & Kinematic Fitting)
(→‎Yield %'s & Signal / Background Ratios)
 
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Line 1: Line 1:
 
== Reaction ==
 
== Reaction ==
 
* γ p → Y(2175), p
 
* γ p → Y(2175), p
−
** Y(2175) &rarr; &pi;<sup>+</sup>, &pi;<sup>-</sup>, &phi;
+
** Y(2175) &rarr; f<sub>0</sub>(980)<sup>0</sup>, &phi;
−
*** &phi; &rarr; K<sup>+</sup>, K<sup>-</sup>
+
*** f<sub>0</sub>(980)<sup>0</sup> &rarr; &pi;<sup>+</sup>, &pi;<sup>-</sup>
 +
**** &phi; &rarr; K<sup>+</sup>, K<sup>-</sup>
 
* Final State: p, &pi;<sup>+</sup>, &pi;<sup>-</sup>, K<sup>+</sup>, K<sup>-</sup>
 
* Final State: p, &pi;<sup>+</sup>, &pi;<sup>-</sup>, K<sup>+</sup>, K<sup>-</sup>
 
* Events generated with: &Gamma;<sub>Y(2175)</sub> = 61 MeV/c<sup>2</sup>, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
 
* Events generated with: &Gamma;<sub>Y(2175)</sub> = 61 MeV/c<sup>2</sup>, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
Line 19: Line 20:
 
== Mass Peaks & Kinematic Fitting ==
 
== Mass Peaks & Kinematic Fitting ==
  
−
=== genr8 Y(2175) Signal ===
+
* NOTES:
 +
** Plots are shown for "Missing p, VertexP4 KinFit" only.
 +
** Mass Plots: Pre-KinFit is Magenta, Post-KinFit is Teal
 +
** Kinematic Fit Confidence Level is zoomed in: spike at 0 confidence is well off the top of the plot
 +
** For the genr8 background, It wasn't possible to lineup every mass peak (without generating the recoil proton at a bogus mass), so the missing mass peak is a little off-center.
 +
** If a cut is shown, then all "Post-KinFit" plots after that cut include it.
 +
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 +
!width="75"| Plot
 +
!width="350"| genr8 Y(2175) Signal
 +
!width="350"| genr8 Y(2175) Background
 +
!width="350"| bggen Background
 +
|-
 +
! Confidence Level
 +
| [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
 +
|-
 +
! Missing Mass
 +
| [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
 +
|-
 +
! &phi; Mass
 +
| [[Image:Mattione_Update_09132012_PhiMass_MissingP_VertexP4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_PhiMass_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PhiMass_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
 +
|-
 +
! Y(2175) Mass
 +
| [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_VertexP4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
 +
|}
 +
<br style="clear:both;"/>
  
−
* Kinematic Fit Confidence Level (Zoomed in; spike at 0 confidence is well off the top of the plot)
+
== Cherenkov Detector Comparison ==
−
** NOTE: &phi; mass is not constrained by kinematic fit.  
+
 
 +
=== genr8 Y(2175) Background ===
 +
 
 +
* P vs. &theta; of &pi;<sup>+</sup>'s as K<sup>+</sup> candidates ("All" means all post-analysis cuts, pre-Cherenkov cuts)
 +
** &pi;<sup>-</sup>'s as K<sup>-</sup> not shown: identical due to symmetry.
 +
** Plots are shown for "Missing p, VertexP4 KinFit" only.
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="75"| Detector
−
!width="350"| P4 KinFit
+
!width="350"| % of Pions That Fail Kaon Cut
−
!width="350"| VertexP4 KinFit
+
!width="350"| Pions That Fail Kaon Cut
−
|-
+
!width="350"| Pions That Survive Kaon Cut
−
! Missing
+
|-  
−
| [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_P4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Y2175.png|left|350px]]
+
! No CKOV
−
|-
+
| [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_All_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || NA || NA
−
! Not Missing
+
|-
−
| [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_P4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_VertexP4KinFit_Y2175.png|left|350px]]
+
! He DC
 +
| 23.57% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedHeDC_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedHeDC_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]]
 +
|-  
 +
! Gas Threshold
 +
| 10.24% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedGasThresh_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedGasThresh_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]]
 +
|-
 +
! HBRICH
 +
| <span style="color:blue">98.40%</span> || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedRICH_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedRICH_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]]
 +
|-
 +
! LHCb RICH
 +
| <span style="color:blue">98.01%</span> || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedLHCbRICH_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedLHCbRICH_MissingP_VertexP4KinFit_Y2175bkgnd.png|left|350px]]
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
* &phi; Invariant Mass (Before/after KinFit where present)
+
=== bggen Background ===
−
** NOTE: &phi; mass is not constrained by kinematic fit.  
+
 
 +
* P vs. &theta; of &pi;<sup>+</sup>'s as K<sup>+</sup> candidates ("All" means all post-analysis cuts, pre-Cherenkov cuts)
 +
** &pi;<sup>-</sup>'s as K<sup>-</sup> not shown: identical due to symmetry.
 +
** Plots are shown for "Missing p, VertexP4 KinFit" only.
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="75"| Detector
−
!width="350"| No KinFit
+
!width="350"| % of Pions That Fail Kaon Cut
−
!width="350"| P4 KinFit
+
!width="350"| Pions That Fail Kaon Cut
−
!width="350"| VertexP4 KinFit
+
!width="350"| Pions That Survive Kaon Cut
−
|-
+
|-  
−
! Missing
+
! No CKOV
−
| [[Image:Mattione_Update_09132012_PhiMass_MissingP_NoKinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_PhiMass_MissingP_P4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_PhiMass_MissingP_VertexP4KinFit_Y2175.png|left|350px]]
+
| [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_All_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]] || NA || NA
−
|-
+
|-
−
! Not Missing
+
! He DC
−
| [[Image:Mattione_Update_09132012_PhiMass_NoMissing_NoKinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_PhiMass_NoMissing_P4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_PhiMass_NoMissing_VertexP4KinFit_Y2175.png|left|350px]]
+
| 22.92% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedHeDC_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedHeDC_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
 +
|-  
 +
! Gas Threshold
 +
| 7.55% || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedGasThresh_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedGasThresh_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
 +
|-
 +
! HBRICH
 +
| <span style="color:blue">56.77%</span> || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedRICH_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedRICH_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
 +
|-
 +
! LHCb RICH
 +
| <span style="color:blue">60.42%</span> || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_FailedLHCbRICH_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_PVsTheta_PiPlusPassKPlus_PassedLHCbRICH_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
* Missing Mass & Missing Mass Squared (Before/after KinFit where present)
+
== Yield %'s & Signal / Background Ratios ==
 +
* ALL data are determined in the signal region (track combinations with invariant mass outside of the signal region are ignored), and from E<sub>&gamma;</sub> = 8.5 - 9.0 GeV
 +
 
 +
=== Yield %'s ===
 +
* % of generated events remaining after all cuts (including a final cut requiring that all tracks have the correct THROWN PID)
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="200"| Detector / PID Cut
−
!width="350"| No KinFit
+
!width="300"| Missing p, No Fit
−
!width="350"| P4 KinFit
+
!width="300"| Missing p, P4 Fit
−
!width="350"| VertexP4 KinFit
+
!width="300"| Missing p, VertexP4 Fit
 +
!width="300"| No Missing, No Fit
 +
!width="300"| No Missing, P4 Fit
 +
!width="300"| No Missing, VertexP4 Fit
 
|-
 
|-
−
! Missing
+
! No CKOV
−
| [[Image:Mattione_Update_09132012_MissingMass_MissingP_NoKinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_P4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Y2175.png|left|350px]]
+
| 9.66363% || 9.91859% || 7.50864% || 5.08872% || 3.3008% || 2.64085%
 
|-
 
|-
−
! Not Missing
+
! He DC <br style="clear:both;"/> K: 1 Exclusive
−
| [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_NoKinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_P4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_VertexP4KinFit_Y2175.png|left|350px]]
+
| 7.6393% || 7.75866% || 5.92137% || 4.00075% || 2.58191% || 2.06825%
 +
|-
 +
! Gas Threshold <br style="clear:both;"/> K: 1 Exclusive
 +
| 9.34382% || 9.60139% || 7.32316% || 4.92314% || 3.2149% || 2.57775%
 +
|-
 +
! HBRICH <br style="clear:both;"/> K: 1 Exclusive
 +
| 9.17437% || 9.41574% || 7.18456% || 4.83356% || 3.15836% || 2.53028%
 +
|-
 +
! LHCb RICH <br style="clear:both;"/> K: 1 Exclusive
 +
| 9.25765% || 9.51254% || 7.2575% || 4.87959% || 3.19227% || 2.55721%
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
* Y(2175) Invariant Mass (Before/after KinFit where present)
+
=== Exclusive Kaon Cut Signal Yield Loss ===
 +
* % of pre-CKOV signal events LOST due to exclusive Kaon cut
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="200"| Detector / PID Cut
−
!width="350"| No KinFit
+
!width="300"| Missing p, No Fit
−
!width="350"| P4 KinFit
+
!width="300"| Missing p, P4 Fit
−
!width="350"| VertexP4 KinFit
+
!width="300"| Missing p, VertexP4 Fit
 +
!width="300"| No Missing, No Fit
 +
!width="300"| No Missing, P4 Fit
 +
!width="300"| No Missing, VertexP4 Fit
 +
|-
 +
! He DC <br style="clear:both;"/> K: 1 Exclusive
 +
| 20.9479% || 21.7766% || 21.1393% || 21.38% || 21.7791% || 21.6826%
 +
|-
 +
! Gas Threshold <br style="clear:both;"/> K: 1 Exclusive
 +
| 3.30938% || 3.19803% || 2.47022% || 3.25377% || 2.60219% || 2.38949%
 
|-
 
|-
−
! Missing
+
! HBRICH <br style="clear:both;"/> K: 1 Exclusive
−
| [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_NoKinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_P4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_VertexP4KinFit_Y2175.png|left|350px]]
+
| 5.06284% || 5.06975% || 4.31607% || 5.01412% || 4.31516% || 4.18701%
 
|-
 
|-
−
! Not Missing
+
! LHCb RICH <br style="clear:both;"/> K: 1 Exclusive
−
| [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_NoKinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_P4KinFit_Y2175.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_VertexP4KinFit_Y2175.png|left|350px]]
+
| 4.20113% || 4.09389% || 3.34465% || 4.10968% || 3.28807% || 3.16726%
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
=== genr8 Y(2175) Background ===
+
=== Signal / Background Ratios ===
−
* Generate pions instead of kaons, shift generated mass peaks so that when the kaon mass is assigned to the kaon candidates (pions), the mass peaks shift to the original signal masses.
+
* Signal / Background Ratios
−
** Note that it is impossible to get every peak to line up without generated a recoil proton with a bogus mass.  Therefore, the missing mass peak is slightly off. 
+
−
 
+
−
* Kinematic Fit Confidence Level (Zoomed in; spike at 0 confidence is well off the top of the plot)
+
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="200"| Detector / PID Cut
−
!width="350"| P4 KinFit
+
!width="300"| Missing p, No Fit
−
!width="350"| VertexP4 KinFit
+
!width="300"| Missing p, P4 Fit
 +
!width="300"| Missing p, VertexP4 Fit
 +
!width="300"| No Missing, No Fit
 +
!width="300"| No Missing, P4 Fit
 +
!width="300"| No Missing, VertexP4 Fit
 
|-
 
|-
−
! Missing
+
! No CKOV
−
| [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_P4KinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Y2175Bkgnd.png|left|350px]]
+
| 0.00106212 || 0.00136379 || 0.0250697 || 0.0135034 ||  ||  
 
|-
 
|-
−
! Not Missing
+
! He DC <br style="clear:both;"/> K: Inclusive
−
| [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_P4KinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_VertexP4KinFit_Y2175Bkgnd.png|left|350px]]
+
| 0.00117589 || 0.00153125 || 0.0365619 || 0.0171601 ||  ||
 +
|-
 +
! Gas Threshold <br style="clear:both;"/> K: Inclusive
 +
| 0.00109474 || 0.00140526 || 0.0343859 || 0.0150712 ||  ||
 +
|-
 +
! HBRICH <br style="clear:both;"/> K: Inclusive
 +
| 0.00126519 || 0.00166155 || 0.0585217 || 0.0309852 ||  ||
 +
|-
 +
! LHCb RICH <br style="clear:both;"/> K: Inclusive
 +
| 0.00121623 || 0.00160001 || 0.0530719 || 0.0247906 ||  ||
 +
|-
 +
! He DC <br style="clear:both;"/> K: 1 Exclusive
 +
| 0.00312333 || 0.00395292 || 0.0658157 || 0.0337837 ||  ||
 +
|-
 +
! Gas Threshold <br style="clear:both;"/> K: 1 Exclusive
 +
| 0.00343035 || 0.00432616 || 0.0813565 || 0.0311833 ||  ||
 +
|-
 +
! HBRICH <br style="clear:both;"/> K: 1 Exclusive
 +
| 0.00397305 || 0.00518064 || 0.104682 || 0.0524333 ||  ||
 +
|-
 +
! LHCb RICH <br style="clear:both;"/> K: 1 Exclusive
 +
| 0.00385906 || 0.00495419 || 0.105741 || 0.0427721 ||  ||  
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
* Missing Mass & Missing Mass Squared (Before/after KinFit where present)
+
=== Signal / Background Ratios : Improvements Over No CKOV ===
 +
* Detector Signal / Background Ratio (StBR) DIVIDED BY No CKOV StBR
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="200"| Detector / PID Cut
−
!width="350"| No KinFit
+
!width="300"| Missing p, No Fit
−
!width="350"| P4 KinFit
+
!width="300"| Missing p, P4 Fit
−
!width="350"| VertexP4 KinFit
+
!width="300"| Missing p, VertexP4 Fit
 +
!width="300"| No Missing, No Fit
 +
!width="300"| No Missing, P4 Fit
 +
!width="300"| No Missing, VertexP4 Fit
 +
|-
 +
! He DC <br style="clear:both;"/> K: Inclusive
 +
| 1.10711 || 1.1228 || 1.45841 || 1.2708 ||  ||
 +
|-
 +
! Gas Threshold <br style="clear:both;"/> K: Inclusive
 +
| 1.03071 || 1.03041 || 1.37161 || 1.11611 ||  ||
 +
|-
 +
! HBRICH <br style="clear:both;"/> K: Inclusive
 +
| 1.19119 || 1.21834 || 2.33436 || 2.29462 ||  ||
 +
|-
 +
! LHCb RICH <br style="clear:both;"/> K: Inclusive
 +
| 1.14509 || 1.17321 || 2.11697 || 1.83588 ||  ||
 +
|-
 +
! He DC <br style="clear:both;"/> K: 1 Exclusive
 +
| 2.94065 || 2.89849 || 2.6253 || 2.50187 ||  ||
 +
|-
 +
! Gas Threshold <br style="clear:both;"/> K: 1 Exclusive
 +
| 3.22971 || 3.17217 || 3.24521 || 2.30929 ||  ||
 
|-
 
|-
−
! Missing
+
! HBRICH <br style="clear:both;"/> K: 1 Exclusive
−
| [[Image:Mattione_Update_09132012_MissingMass_MissingP_NoKinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_P4KinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Y2175Bkgnd.png|left|350px]]
+
| 3.74067 || 3.79871 || 4.17563 || 3.88297 || ||  
 
|-
 
|-
−
! Not Missing
+
! LHCb RICH <br style="clear:both;"/> K: 1 Exclusive
−
| [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_NoKinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_P4KinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_VertexP4KinFit_Y2175Bkgnd.png|left|350px]]
+
| 3.63334 || 3.63267 || 4.21788 || 3.16751 || ||  
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
* Y(2175) Invariant Mass (Before/after KinFit where present)
+
<!--
 +
== Yields %'s ==
 +
* ALL yield %'s are determined in the signal region (track combinations with invariant mass outside of the signal region are ignored)
 +
 
 +
=== genr8 Y(2175) Signal Events ===
 +
 
 +
* % of generated events remaining after all cuts (including a final cut requiring that all tracks have the correct THROWN PID)  
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="350"| Missing p, No KinFit
−
!width="350"| No KinFit
+
!width="350"| Missing p, P4 KinFit
−
!width="350"| P4 KinFit
+
!width="350"| Missing p, VertexP4 KinFit
−
!width="350"| VertexP4 KinFit
+
!width="350"| No Missing, No KinFit
−
|-
+
!width="350"| No Missing, P4 KinFit
−
! Missing
+
!width="350"| No Missing, VertexP4 KinFit
−
| [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_NoKinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_P4KinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_VertexP4KinFit_Y2175Bkgnd.png|left|350px]]
+
 
|-
 
|-
−
! Not Missing
+
| || 8.37% || 7.55% || || ||  
−
| [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_NoKinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_P4KinFit_Y2175Bkgnd.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_VertexP4KinFit_Y2175Bkgnd.png|left|350px]]
+
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
=== bggen Background ===
+
* % of BAD reconstructed combos remaining (BAD combo: a combo where at least one track has the wrong THROWN PID)  
−
 
+
−
* Kinematic Fit Confidence Level (Zoomed in; spike at 0 confidence is well off the top of the plot)
+
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="75"| Detector
−
!width="350"| P4 KinFit
+
!width="350"| Missing p, No KinFit
−
!width="350"| VertexP4 KinFit
+
!width="350"| Missing p, P4 KinFit
 +
!width="350"| Missing p, VertexP4 KinFit
 +
!width="350"| No Missing, No KinFit
 +
!width="350"| No Missing, P4 KinFit
 +
!width="350"| No Missing, VertexP4 KinFit
 +
|-
 +
! No CKOV
 +
|  || <span style="color:red">3.09%</span> || <span style="color:green">1.61%</span> ||  ||  ||
 +
|-
 +
! He DC
 +
|  || 2.85% || 1.41% ||  ||  ||
 +
|-
 +
! Gas Thresh.
 +
|  || 3.01% || 1.55% ||  ||  ||
 
|-
 
|-
−
! Missing
+
! HBRICH
−
| [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_P4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
+
| || 2.61% || <span style="color:blue">1.23%</span> ||  ||  ||  
 
|-
 
|-
−
! Not Missing
+
! LHCb RICH
−
| [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_P4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_VertexP4KinFit_Y2175bggen.png|left|350px]]
+
| || 2.58% || <span style="color:blue">1.21%</span> ||  ||  ||  
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
* Missing Mass & Missing Mass Squared (Before/after KinFit where present)
+
=== genr8 Y(2175) Background Events ===
 +
 
 +
* % of reconstructed combos remaining
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="75"| Detector
−
!width="350"| No KinFit
+
!width="350"| Missing p, No KinFit
−
!width="350"| P4 KinFit
+
!width="350"| Missing p, P4 KinFit
−
!width="350"| VertexP4 KinFit
+
!width="350"| Missing p, VertexP4 KinFit
 +
!width="350"| No Missing, No KinFit
 +
!width="350"| No Missing, P4 KinFit
 +
!width="350"| No Missing, VertexP4 KinFit
 
|-
 
|-
−
! Missing
+
! No CKOV
−
| [[Image:Mattione_Update_09132012_MissingMass_MissingP_NoKinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_P4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
+
| || 0.85% || 0.65% || || ||  
 
|-
 
|-
−
! Not Missing
+
! He DC
−
| [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_NoKinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_P4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_VertexP4KinFit_Y2175bggen.png|left|350px]]
+
| || 0.51% || 0.37% || ||  ||
 +
|-
 +
! Gas Thresh.
 +
|  || 0.76% || 0.59% ||  ||  ||
 +
|-
 +
! HBRICH
 +
|  || 0.034% || <span style="color:blue">0.0014%</span> || || ||
 +
|-
 +
! LHCb RICH
 +
|  || 0.034% || <span style="color:blue">0.0014%</span> ||  ||  ||  
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
−
* Y(2175) Invariant Mass (Before/after KinFit where present)
+
=== bggen Background Events ===
 +
 
 +
* % of reconstructed combos remaining
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
 
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;"
−
!width="75"| Recoil p
+
!width="75"| Detector
−
!width="350"| No KinFit
+
!width="350"| Missing p, No KinFit
−
!width="350"| P4 KinFit
+
!width="350"| Missing p, P4 KinFit
−
!width="350"| VertexP4 KinFit
+
!width="350"| Missing p, VertexP4 KinFit
 +
!width="350"| No Missing, No KinFit
 +
!width="350"| No Missing, P4 KinFit
 +
!width="350"| No Missing, VertexP4 KinFit
 +
|-
 +
! No CKOV
 +
|  || <span style="color:red">0.098%</span> || <span style="color:green">0.0085%</span> ||  ||  ||
 +
|-
 +
! He DC
 +
|  || 0.085% || 0.0053% ||  ||  ||
 +
|-
 +
! Gas Thresh.
 +
|  || 0.096% || 0.0080% ||  ||  ||
 
|-
 
|-
−
! Missing
+
! HBRICH
−
| [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_NoKinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_P4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_MissingP_VertexP4KinFit_Y2175bggen.png|left|350px]]
+
| || 0.071% || <span style="color:blue">0.0031%</span> || || ||  
 
|-
 
|-
−
! Not Missing
+
! LHCb RICH
−
| [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_NoKinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_P4KinFit_Y2175bggen.png|left|350px]] || [[Image:Mattione_Update_09132012_Y2175Mass_NoMissing_VertexP4KinFit_Y2175bggen.png|left|350px]]
+
| || 0.071% || <span style="color:blue">0.0029%</span> || || ||  
 
|}
 
|}
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
 +
-->

Latest revision as of 12:07, 26 September 2012

Reaction

  • γ p → Y(2175), p
    • Y(2175) → f0(980)0, φ
      • f0(980)0 → π+, π-
        • φ → K+, K-
  • Final State: p, π+, π-, K+, K-
  • Events generated with: ΓY(2175) = 61 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
    • EXTREMELY loose mass cuts around each mass peak (typically at the histogram edges): saves time by reducing # of kinematic fits to perform
    • Require the combined FOM for PID (χ2 and NDF of all tracks summed together) be > 1%
    • Where kinematic fit: Require that the confidence level from the kinematic fit be > 1%
    • Mass cuts as illustrated.

Mass Peaks & Kinematic Fitting

  • NOTES:
    • Plots are shown for "Missing p, VertexP4 KinFit" only.
    • Mass Plots: Pre-KinFit is Magenta, Post-KinFit is Teal
    • Kinematic Fit Confidence Level is zoomed in: spike at 0 confidence is well off the top of the plot
    • For the genr8 background, It wasn't possible to lineup every mass peak (without generating the recoil proton at a bogus mass), so the missing mass peak is a little off-center.
    • If a cut is shown, then all "Post-KinFit" plots after that cut include it.
Plot genr8 Y(2175) Signal genr8 Y(2175) Background bggen Background
Confidence Level
Mattione Update 09132012 KinFitConLev MissingP VertexP4KinFit Y2175.png
Mattione Update 09132012 KinFitConLev MissingP VertexP4KinFit Y2175bkgnd.png
Mattione Update 09132012 KinFitConLev MissingP VertexP4KinFit Y2175bggen.png
Missing Mass
Mattione Update 09132012 MissingMass MissingP VertexP4KinFit Y2175.png
Mattione Update 09132012 MissingMass MissingP VertexP4KinFit Y2175bkgnd.png
Mattione Update 09132012 MissingMass MissingP VertexP4KinFit Y2175bggen.png
φ Mass
Mattione Update 09132012 PhiMass MissingP VertexP4KinFit Y2175.png
Mattione Update 09132012 PhiMass MissingP VertexP4KinFit Y2175bkgnd.png
Mattione Update 09132012 PhiMass MissingP VertexP4KinFit Y2175bggen.png
Y(2175) Mass
Mattione Update 09132012 Y2175Mass MissingP VertexP4KinFit Y2175.png
Mattione Update 09132012 Y2175Mass MissingP VertexP4KinFit Y2175bkgnd.png
Mattione Update 09132012 Y2175Mass MissingP VertexP4KinFit Y2175bggen.png


Cherenkov Detector Comparison

genr8 Y(2175) Background

  • P vs. θ of π+'s as K+ candidates ("All" means all post-analysis cuts, pre-Cherenkov cuts)
    • π-'s as K- not shown: identical due to symmetry.
    • Plots are shown for "Missing p, VertexP4 KinFit" only.
Detector  % of Pions That Fail Kaon Cut Pions That Fail Kaon Cut Pions That Survive Kaon Cut
No CKOV
Mattione Update 09132012 PVsTheta PiPlusPassKPlus All MissingP VertexP4KinFit Y2175bkgnd.png
 NA NA
He DC 23.57%
Mattione Update 09132012 PVsTheta PiPlusPassKPlus FailedHeDC MissingP VertexP4KinFit Y2175bkgnd.png
Mattione Update 09132012 PVsTheta PiPlusPassKPlus PassedHeDC MissingP VertexP4KinFit Y2175bkgnd.png
Gas Threshold 10.24%
Mattione Update 09132012 PVsTheta PiPlusPassKPlus FailedGasThresh MissingP VertexP4KinFit Y2175bkgnd.png
Mattione Update 09132012 PVsTheta PiPlusPassKPlus PassedGasThresh MissingP VertexP4KinFit Y2175bkgnd.png
HBRICH 98.40%
Mattione Update 09132012 PVsTheta PiPlusPassKPlus FailedRICH MissingP VertexP4KinFit Y2175bkgnd.png
Mattione Update 09132012 PVsTheta PiPlusPassKPlus PassedRICH MissingP VertexP4KinFit Y2175bkgnd.png
LHCb RICH 98.01%
Mattione Update 09132012 PVsTheta PiPlusPassKPlus FailedLHCbRICH MissingP VertexP4KinFit Y2175bkgnd.png
Mattione Update 09132012 PVsTheta PiPlusPassKPlus PassedLHCbRICH MissingP VertexP4KinFit Y2175bkgnd.png


bggen Background

  • P vs. θ of π+'s as K+ candidates ("All" means all post-analysis cuts, pre-Cherenkov cuts)
    • π-'s as K- not shown: identical due to symmetry.
    • Plots are shown for "Missing p, VertexP4 KinFit" only.
Detector  % of Pions That Fail Kaon Cut Pions That Fail Kaon Cut Pions That Survive Kaon Cut
No CKOV
Mattione Update 09132012 PVsTheta PiPlusPassKPlus All MissingP VertexP4KinFit Y2175bggen.png
 NA NA
He DC 22.92%
Mattione Update 09132012 PVsTheta PiPlusPassKPlus FailedHeDC MissingP VertexP4KinFit Y2175bggen.png
Mattione Update 09132012 PVsTheta PiPlusPassKPlus PassedHeDC MissingP VertexP4KinFit Y2175bggen.png
Gas Threshold 7.55%
Mattione Update 09132012 PVsTheta PiPlusPassKPlus FailedGasThresh MissingP VertexP4KinFit Y2175bggen.png
Mattione Update 09132012 PVsTheta PiPlusPassKPlus PassedGasThresh MissingP VertexP4KinFit Y2175bggen.png
HBRICH 56.77%
Mattione Update 09132012 PVsTheta PiPlusPassKPlus FailedRICH MissingP VertexP4KinFit Y2175bggen.png
Mattione Update 09132012 PVsTheta PiPlusPassKPlus PassedRICH MissingP VertexP4KinFit Y2175bggen.png
LHCb RICH 60.42%
Mattione Update 09132012 PVsTheta PiPlusPassKPlus FailedLHCbRICH MissingP VertexP4KinFit Y2175bggen.png
Mattione Update 09132012 PVsTheta PiPlusPassKPlus PassedLHCbRICH MissingP VertexP4KinFit Y2175bggen.png


Yield %'s & Signal / Background Ratios

  • ALL data are determined in the signal region (track combinations with invariant mass outside of the signal region are ignored), and from Eγ = 8.5 - 9.0 GeV

Yield %'s

  •  % of generated events remaining after all cuts (including a final cut requiring that all tracks have the correct THROWN PID)
Detector / PID Cut Missing p, No Fit Missing p, P4 Fit Missing p, VertexP4 Fit No Missing, No Fit No Missing, P4 Fit No Missing, VertexP4 Fit
No CKOV 9.66363% 9.91859% 7.50864% 5.08872% 3.3008% 2.64085%
He DC
K: 1 Exclusive 		7.6393% 7.75866% 5.92137% 4.00075% 2.58191% 2.06825%
Gas Threshold
K: 1 Exclusive 		9.34382% 9.60139% 7.32316% 4.92314% 3.2149% 2.57775%
HBRICH
K: 1 Exclusive 		9.17437% 9.41574% 7.18456% 4.83356% 3.15836% 2.53028%
LHCb RICH
K: 1 Exclusive 		9.25765% 9.51254% 7.2575% 4.87959% 3.19227% 2.55721%


Exclusive Kaon Cut Signal Yield Loss

  •  % of pre-CKOV signal events LOST due to exclusive Kaon cut
Detector / PID Cut Missing p, No Fit Missing p, P4 Fit Missing p, VertexP4 Fit No Missing, No Fit No Missing, P4 Fit No Missing, VertexP4 Fit
He DC
K: 1 Exclusive 		20.9479% 21.7766% 21.1393% 21.38% 21.7791% 21.6826%
Gas Threshold
K: 1 Exclusive 		3.30938% 3.19803% 2.47022% 3.25377% 2.60219% 2.38949%
HBRICH
K: 1 Exclusive 		5.06284% 5.06975% 4.31607% 5.01412% 4.31516% 4.18701%
LHCb RICH
K: 1 Exclusive 		4.20113% 4.09389% 3.34465% 4.10968% 3.28807% 3.16726%


Signal / Background Ratios

  • Signal / Background Ratios
Detector / PID Cut Missing p, No Fit Missing p, P4 Fit Missing p, VertexP4 Fit No Missing, No Fit No Missing, P4 Fit No Missing, VertexP4 Fit
No CKOV 0.00106212 0.00136379 0.0250697 0.0135034
He DC
K: Inclusive 		0.00117589 0.00153125 0.0365619 0.0171601
Gas Threshold
K: Inclusive 		0.00109474 0.00140526 0.0343859 0.0150712
HBRICH
K: Inclusive 		0.00126519 0.00166155 0.0585217 0.0309852
LHCb RICH
K: Inclusive 		0.00121623 0.00160001 0.0530719 0.0247906
He DC
K: 1 Exclusive 		0.00312333 0.00395292 0.0658157 0.0337837
Gas Threshold
K: 1 Exclusive 		0.00343035 0.00432616 0.0813565 0.0311833
HBRICH
K: 1 Exclusive 		0.00397305 0.00518064 0.104682 0.0524333
LHCb RICH
K: 1 Exclusive 		0.00385906 0.00495419 0.105741 0.0427721


Signal / Background Ratios : Improvements Over No CKOV

  • Detector Signal / Background Ratio (StBR) DIVIDED BY No CKOV StBR
Detector / PID Cut Missing p, No Fit Missing p, P4 Fit Missing p, VertexP4 Fit No Missing, No Fit No Missing, P4 Fit No Missing, VertexP4 Fit
He DC
K: Inclusive 		1.10711 1.1228 1.45841 1.2708
Gas Threshold
K: Inclusive 		1.03071 1.03041 1.37161 1.11611
HBRICH
K: Inclusive 		1.19119 1.21834 2.33436 2.29462
LHCb RICH
K: Inclusive 		1.14509 1.17321 2.11697 1.83588
He DC
K: 1 Exclusive 		2.94065 2.89849 2.6253 2.50187
Gas Threshold
K: 1 Exclusive 		3.22971 3.17217 3.24521 2.30929
HBRICH
K: 1 Exclusive 		3.74067 3.79871 4.17563 3.88297
LHCb RICH
K: 1 Exclusive 		3.63334 3.63267 4.21788 3.16751



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